HomeMy WebLinkAboutLA192028 Approved plans
Wyssling Consulting
76 North Meadowbrook Drive
Alpine, UT 84004
Scott E. Wyssling, PE, PP, CME office (201) 874-3483
swyssling@wysslingconsulting.com
June 1, 2021
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
Re: Engineering Services
Gathaara Residence
4552 168th Street West, Lakeville MN
10.080 kW System
To Whom It May Concern:
Pursuant to your request, we have reviewed the following information regarding solar panel installation on
the roof of the above referenced home:
1. Site Visit/Verification Form prepared by an Everlight Solar representative identifying
specific site information including size and spacing of trusses for the existing roof structure.
2. Design drawings of the proposed system including a site plan, roof plan and connection
details for the solar panels. This information was prepared by Everlight Solar and will be
utilized for approval and construction of the proposed system.
3. Photographs of the interior and exterior of the roof system identifying existing structural
members and their conditions.
Based on the above information we have evaluated the structural capacity of the existing roof system to
support the additional loads imposed by the solar panels and have the following comments related to our
review and evaluation:
Description of Residence:
The existing residence is typical wood framing construction with the roof system consisting of truss system
with all chords constructed of 2 x 4 dimensional lumber at 24” on center. The attic space is unfinished and
photos indicate that there was free access to visually inspect the size and condition of the roof trusses. All
wood material utilized for the roof system is assumed to be Doug-Fir #2 or better with standard construction
components. The existing roofing material consists of composite asphalt shingles. Photos of the dwelling
also indicate that there is a permanent foundation.
A. Loading Criteria Used
109 MPH wind loading based on ASCE 7-16 Exposure Category “C” at a slope of 39 degrees
7 PSF = Dead Load roofing/framing Live Load = 20 PSF Snow Load = 50 PSF
3 PSF = Dead Load solar panels/mounting hardware
Total Dead Load =10 PSF
The above values are within acceptable limits of recognized industry standards for similar
structures in accordance with the Minnesota Residential Code (2018 IRC). Analysis performed of
the existing roof structure utilizing the above loading criteria indicates that the existing trusses will
support the additional panel loading without damage, if installed correctly.
Page 2 of 2
B. Solar Panel Anchorage
1. The solar panels shall be mounted in accordance with the most recent “Quickbolt Installation
Instruction”, which can be found on the Quickbolt website (http://quickbolt.com/). If during solar
panel installation, the roof framing members appear unstable or deflect non-uniformly, our office
should be notified before proceeding with the installation.
2. Maximum allowable pullout per lag screw is 235 lbs/inch of penetration as identified in the National
Design Standards (NDS) of timber construction specifications for Doug-Fir (North Lumber)
assumed. Based on our evaluation, the pullout value, utilizing a penetration depth of 2 ½”, is less
than what is allowable per connection and therefore is adequate. Based on the variable factors for
the existing roof framing and installation tolerances, using a thread depth of 2 ½” with a minimum
size of 5/16” lag screw per attachment point for panel anchor mounts should be adequate with a
sufficient factor of safety.
3. Considering the roof slopes, the size, spacing, condition of roof, the panel supports shall be placed
no greater than 48” o/c.
4. Panel supports connections shall be staggered to distribute load to adjacent trusses.
Based on the above evaluation, it is the opinion of this office that with appropriate panel anchors being utilized
the roof system will adequately support the additional loading imposed by the solar panels. This evaluation is in
conformance with the Minnesota Residential Code (2018 IRC), current industry standards, and is based on
information supplied to us at the time of this report.
Should you have any questions regarding the above or if you require further information do not hesitate to
contact me.
Very truly yours,
Scott E. Wyssling, PE
Minnesota License No. 57927
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNPV01 COVER PAGE
PV02 PROPERTY PLAN
PV03 ROOF PLAN
PV04 ROOF ATTACHMENTS + BOM
PV05 MOUNTING DETAIL
PV06 ELECTRICAL DIAGRAM
PV07 LABELS
PV08 PLACARD
PV09 SITE PHOTOS
DATE: May 31, 2021
PV01
PAGE: SHEET NAME:
COVER PAGE
DRAWN BY:
SoloCAD
GENERAL NOTES:
1.INSTALLATION OF SOLAR PHOTOVOLTAIC SYSTEM SHALL BE IN ACCORDANCE WITH NEC ARTICLE
690, AND ALL OTHER APPLICABLE NEC CODES WHERE NOTED OR EXISTING.
2.PROPER ACCESS AND WORKING CLEARANCE AROUND EXISTING AND PROPOSED ELECTRICAL
EQUIPMENT WILL COMPLY WITH NEC ARTICLE 110.
3.ALL WIRES, INCLUDING THE GROUNDING ELECTRODE CONDUCTOR SHALL BE PROTECTED FROM
PHYSICAL DAMAGE IN ACCORDANCE WITH NEC ARTICLE 250
4.THE PV MODULES ARE CONSIDERED NON-COMBUSTIBLE; THIS SYSTEM IS UTILITY INTERACTIVE PER
UL 1741 AND DOES NOT INCLUDE STORAGE BATTERIES OR OTHER ALTERNATIVE STORAGE SOURCES.
5.ALL DC WIRES SHALL BE SIZED ACCORDING TO [NEC 690.8]
6.DC CONDUCTORS SHALL BE WITHIN PROTECTED RACEWAYS IN ACCORDANCE WITH [NEC 690.31]
7.ALL SIGNAGE TO BE PLACED IN ACCORDANCE WITH LOCAL JURISDICTIONAL BUILDING CODE.
APPLICABLE GOVERNING CODES:
DESCRIPTION OF DESIGN:
INSTALLATION OF GRID -TIED, UTILITY INTERACTIVE PHOTOVOLTAIC SYSTEM
AERIAL VIEW:STREET VIEW:SHEET INDEX:
EQUIPMENT:
MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC
DC SYSTEM SIZE: 10.08 kW DC
(28) Silfab SIL-360 NX mono PERC PV MODULES
(14) AP Systems YC600 INVERTERS
RACKING: SolarRoofHook - 48" O.C.
SITE SPECIFICATIONS:
OCCUPANCY: R-3
ZONING: RESIDENTIAL
2020 NEC
2020 MRC
2020 MFC
2020 MBC
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSM MSP
AC
C
JB
JB JBCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNDATE: May 31, 2021
PV02
PAGE: SHEET NAME:
PROPERTY PLAN
DRAWN BY:
SoloCAD
SCALE:
EQUIPMENT LEGEND:
INVERTER
VISIBLE, LOCKABLE, LABELED
AC DISCONNECT
METER SOCKET
(FOR UTILITY PV METER)
UTILITY METER
MAIN SERVICE PANEL
LC LOAD CENTER
FIRE ACCESS PATHWAY (3' TYP)
C
INV
PV
AC
MSP
M
COMBINER BOX
PROPERTY LINE
FRONT OF HOME
4552 168th St W
MP3
PITCH: 39°
AZIMUTH: 91°
MP2
PITCH: 39°
AZIMUTH: 271°
MP1
PITCH: 39°
AZIMUTH: 181°
BATT BATTERY(IES)
VISIBLE, LOCKABLE,
LABELED AC DISCONNECT
LOCATED WITHIN 10'
OF UTILITY METER1" = 22.86'
ALL PV EQUIPMENT INSTALLED
WITHIN 10' OF UTILITY METER
24/7 UNESCORTED KEYLESS
ACCESS SHALL BE PROVIDED
TO XCEL ENERGY FOR ALL
XCEL ENERGY OWNED
METERS AND DISCONNECTS
NO CLEARANCE ISSUES AROUND
HOME OR SOLAR ARRAY
ELECTRIC SERVICE LINES ARE
UNDERGROUND NOT OVERHEAD
SOLAR ARRAY INVERTERS
BEHIND PANELS
MAIN SERVICE PANEL LOCATED
INSIDE
60'-4"
134'-6"
DIAMONTE PATH
175' E
2'2'
CASE #04449327
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSM MSP
AC
C
JB
JB JBCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNMP3
PITCH: 39°
AZIMUTH: 91°
DATE: May 31, 2021
PV03
PAGE: SHEET NAME:
ROOF PLAN
DRAWN BY:
SoloCAD
EQUIPMENT LEGEND:
INVERTER
VISIBLE, LOCKABLE, LABELED
AC DISCONNECT
METER SOCKET
(FOR UTILITY PV METER)
UTILITY METER
MAIN SERVICE PANEL
LC LOAD CENTER
FIRE ACCESS PATHWAY (3' TYP)
C
INV
PV
AC
MSP
M
COMBINER BOX
FRONT OF HOME
MP2
PITCH: 39°
AZIMUTH: 271°
MP1
PITCH: 39°
AZIMUTH: 181°
BATT BATTERY(IES)
VISIBLE, LOCKABLE,
LABELED AC DISCONNECT
LOCATED WITHIN 10'
OF UTILITY METER
36'' FIRE ACCESS PATHWAY
36'' FIRE ACCESS PATHWAY
36'' FIRE ACCESS PATHWAY
18'' TYP
M MSP
AC
C
JB
JB JB
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701EQUIPMENT INFORMATION:
RAIL MANUFACTURER IronRidge
RAIL PART NUMBER XR-10
ATTACHMENTS Quickbolt
ATTACHMENT QTY 56
MIDCLAMP QTY 38
ENDCLAMP QTY 36
SPLICE QTY 0
ROOF INFO:
ROOF TYPE asphalt_shingle
ROOF FRAMING manufactured_truss
RAFTER/TOP CHORD SIZE 2x4
RAFTER/TOP CHORD SPACING 24
ATTACHMENT SPACING 48Xcel Energy MNDATE: May 31, 2021
PV04
PAGE: SHEET NAME:
ROOF ATTACHMENTS + BOM
DRAWN BY:
SoloCAD
ROOF ATTACHMENT COUNT:56
PV MODULE COUNT:28
ARRAY AREA:MODULE COUNT * 18.06ft² = 505.68
ROOF AREA:3035 ft²
PERCENT OF ROOF COVERED:17%
ARRAY WEIGHT:MODULE COUNT * 50lbs = 1400
DISTRIBUTED LOAD:ARRAY LBS/ATTACHMENTS = 25
POINT LOAD: (lbs/ft²)(ARRAY) WEIGHT/AREA = 2.77 lbs/ft²
PHOTOVOLTAIC ARRAY STRUCTURAL CRITERIA:
RAIL
L-FOOT/ATTACHMENT BRACKET
(E) ROOF FRAMING
5/16" STAINLESS STEEL LAG-BOLT
WITH 2-1/2" MIN. EMBEDMENT
AND FLAT WASHER
FLASHING
PV MODULE
(E) COMP SHINGLE ROOF (1 LAYER)
RAIL
END CLAMP
PV MODULE
MID CLAMP
PV MODULE
4"
2 1
2" MIN.
DEPTH
RAIL
RAIL
FLASHING & LAG-BOLT
2'-8" MIN -
3'-10" MAX
3
RAIL
PV MODULE
" MAX."1'-8"
MAX.
21
FRONT VIEW
10" MIN -
1'-4"
MAX2'-8" MIN -
3'-10" MAX
10" MIN -
1'-4"
MAX
SIDE VIEW
(E) RAFTER/TOP CHORDS
(E) RAFTER/TOP CHORD
DETAIL, MOUNTING AND FLASHING
END CLAMP DETAILS MID CLAMP DETAILS
3
21
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701EQUIPMENT INFORMATION:
RAIL MANUFACTURER IronRidge
RAIL PART NUMBER XR-10
ATTACHMENTS Quickbolt
ATTACHMENT QTY 56
MIDCLAMP QTY 38
ENDCLAMP QTY 36
SPLICE QTY 0
ROOF INFO:
ROOF TYPE asphalt_shingle
ROOF FRAMING manufactured_truss
RAFTER/TOP CHORD SIZE 2x4
RAFTER/TOP CHORD SPACING 24
ATTACHMENT SPACING 48Xcel Energy MNDATE: May 31, 2021
PV05
PAGE: SHEET NAME:
MOUNTING DETAIL
DRAWN BY:
SoloCAD
ROOF ATTACHMENT COUNT:56
PV MODULE COUNT:28
ARRAY AREA:MODULE COUNT * 18.06ft² = 505.68
ROOF AREA:3035 ft²
PERCENT OF ROOF COVERED:17%
ARRAY WEIGHT:MODULE COUNT * 50lbs = 1400
DISTRIBUTED LOAD:ARRAY LBS/ATTACHMENTS = 25
POINT LOAD: (lbs/ft²)(ARRAY) WEIGHT/AREA = 2.77 lbs/ft²
PHOTOVOLTAIC ARRAY STRUCTURAL CRITERIA:
(PV OCPD)
4
PV AC DISCONNECT
FUSED, AIC 10kA
VISIBLE, LOCKABLE,
LABELED, OPEN
240V, 2-POLE
(N) FUSES
4
(E) LOADS
N
G
(E)GROUNDING
ELECTRODE
INTERCONNECTION NOTES
1. GROUND FAULT PROTECTION IN ACCORDANCE WITH [NEC
215.9] & [NEC 230.95]
2. SUPPLY SIDE INTERCONNECTION ACCORDING TO
[NEC705.12(A)] WITH SERVICE ENTRANCE CONDUCTORS IN
ACCORDANCE WITH [NEC 240.21(B)]
DISCONNECT NOTES
1. DISCONNECTING SWITCHES SHALL BE WIRED SUCH THAT
WHEN THE SWITCH IS OPENED THE CONDUCTORS REMAINING
LIVE ARE CONNECTED TO THE TERMINALS MARKED “LINE SIDE”
(TYPICALLY THE UPPER TERMINALS)
2. AC DISCONNECT MUST BE ACCESSIBLE TO QUALIFIED UTILITY
PERSONNEL, BE LOCKABLE, AND BE A VISIBLE-BREAK SWITCH.
3. FUSED AC DISCONNECT TO BE USED.
(E) MAIN SERVICE PANEL
(E) MAIN BREAKER
(E)
SUPPLY SIDE CONNECTION:
NEC 230.46, NEC 230.79,
NEC 705.12(A).
K4977-INT MILBANK
LUG KIT TO BE ADDED
J-BOX
N
G
AC COMBINER BOX
SOLAR LOADS ONLY
UL 1741 COMPLIANT
AC
DC
AC
DC
STRING [1]
AC
DC
AC
DC
STRING [2]
J-BOX
(N) 100A
(2) 20A-2P
J-BOX
3
1
1
2
2
120/240 VAC
TO UTILITY GRID
(E)UTILITY METER
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 7011 2 3 4(1) 12-2 TC-ER, THWN-2, COPPER
(OR CODE APPROVED EQUIVALENT)
(1) 6 AWG BARE, COPPER (GROUND)
(1) 10 AWG THWN-2, or THHN, or 10/2 NM-B COPPER - (POSITIVE)
(1) 10 AWG THWN-2, or THHN, or 10/2 NM-B COPPER - (NEGATIVE)
(1) 10 AWG THWN-2, or THHN, or 10/2 NM-B COPPER - (GROUND)
(1) 3/4" LIQUID TIGHT OR EMT OR FMC
(OR CODE APPROVED EQUIVALENT)
(2) 10 AWG THHN/THWN-2, COPPER - (L1)
(2) 10 AWG THHN/THWN-2 COPPER - (L2)
(1) 10 AWG THHN/THWN-2 (GROUND)
CONDUIT: 3/4" LIQUID TIGHT OR EMT
(OR CODE APPROVED EQUIVALENT)
(1) 6 AWG THWN-2 COPPER - (L1)
(1) 6 AWG THWN-2 COPPER - (L2)
(1) 6 AWG THWN-2 COPPER - (NEUTRAL)
(1) 8 AWG THWN-2 COPPER - (GROUND)
(1) CONDUIT: 3/4" LIQUID TIGHT OR EMT
(OR CODE APPROVED EQUIVALENT)
SERVICE EQUIPMENT & PV OCPD RATINGS
MAIN BREAKER RATING 200A
MAIN SERVICE BUS RATING 200A
PV OCPD RATING 40A
AC VOLTAGE 240V
AC DISCONNECT RATING 60A
STRINGS:
STRING 1 14 PV MODULES
STRING 2 14 PV MODULES
Xcel Energy MNDATE: May 31, 2021
PV06
PAGE: SHEET NAME:
ELECTRICAL DIAGRAM
DRAWN BY:
SoloCAD
WIRE SCHEDULE
EQUIPMENT SCHEDULE:
TYPE:QTY:DESCRIPTION:RATING:
MODULES:(28)Silfab SIL-360 NX mono PERC 360 W
INVERTERS:(14)AP Systems YC600 548 W
AC DISCONNECT(S):(1)PV AC DISCONNECT, 240V, 2-POLE 60 A
GROUNDING & GENERAL NOTES:
1. PV INVERTER IS UNGROUNDED, TRANSFORMER-LESS TYPE.
2. DC GEC AND AC EGC TO REMAIN UNSPLICED, OR SPLICED TO EXISTING ELECTRODE
3. ANY EXISTING WIRING INVOLVED WITH PV SYSTEM CONNECTION THAT IS FOUND TO BE
INADEQUATE PER CODE SHALL BE CORRECTED PRIOR TO FINAL INSPECTION.
4. JUNCTION BOX QUANTITIES, AND PLACEMENT SUBJECT TO CHANGE IN THE FIELD -
JUNCTION BOXES DEPICTED ON ELECTRICAL DIAGRAM REPRESENT WIRE TYPE
TRANSITIONS.
5. AC DISCONNECT NOTED IN EQUIPMENT SCHEDULE OPTIONAL IF OTHER
AC DISCONNECTING MEANS IS LOCATED WITHIN 10' OF SERVICE DISCONNECT.
CASE #:04449327
DESIGN SHALL MEET
NEC REQUIREMENTS
AP SystemsYC600 (240V) SPECS
MAXIMUM INPUT VOLTAGE: 55V
MAXIMUM INPUT CURRENT: 12A X2
NOMINAL OUTPUT VOLTAGE: 240V
NOMINAL OUTPUT CURRENT:2.28A
1-PHASE 60HZ UL 1741 LISTED
REFERENCE POINT OF APPLICABILITY
1-PH , 240 RATED SERVICE
UTILITY AC
DISCONNECT
ALL PV EQUIPMENT INSTALLED WITHIN 10' OF UTILITY METER
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701LABEL VALUES:
DESCRIPTION VALUE:
DC IMP:7.8
DC VMP:33.1
DC VOC:40.4
DC ISC:SEE DATASHEET
DC SYSTEM SIZE (W):10080
AC OPERATING CURRENT:SEE DATASHEET
AC VOLTAGE:240Xcel Energy MNDATE: May 31, 2021
PV07
PAGE: SHEET NAME:
LABELS
DRAWN BY:
SoloCAD
LABEL 3
AT POINT OF INTERCONNECTION, MARKED AT AC
DISCONNECTING MEANS.
[NEC 690.54, NEC 690.13 (B)]
LABEL 4
AT POINT OF INTERCONNECTION FOR EQUIPMENT
CONTAINING OVERCURRENT DEVICES IN CIRCUTS
SUPPLYING POWER TO A BUSBAR OR CONDUCTOR
SUPPLIED FORM MULTIPLE SOURCES, EACH SERVICE
EQUIPMENT AND ALL ELECTRIC POWER PRODUCTION
SOURCE LOCATIONS.
[NEC 705.12(B)(3)]
LABEL 5
PLACED ADJACENT TO THE BACK-FED BREAKER
FROM THE INVERTER IF TIE IN CONSISTS OF LOAD
SIDE CONNECTION TO BUSBAR.
[NEC 705.12(D)(2)(3)(b)]
*ELECTRICAL DIAGRAM SHOWN ABOVE IS FOR LABELING PURPOSES ONLY. NOT AN ACTUAL REPRESENATION OF EQUIPMENT AND CONNECTIONS TO BE INSTALLED. LABEL LOCATIONS
PRESENTED MAY VERY DEPENDING ON TYPE OF INTERCONNECTION METHOD AND LOCATION PRESENTED ON PV5 OF 3 LINE DIAGRAM. PV5 LINE DIAGRAM TO REFLECT ACTUAL
REPRESENTATION OF PROPOSED SCOPE OF WORK.
JUNCTION BOX
OR COMBINER BOX
MAIN SERVICE PANEL
AC DISCONNECT
EXISTING SUB PANEL
(IF WHERE POINT OF
INTERCONNECTION
IS MADE)
PV COMBINER
SUBPANEL -
IF USED TO COMBINE
PV OUTPUT CIRCUITS
AC
DC
INVERTER (S)
INTEGRATED DC DISCONNECT
2
3
47
3
9
5
(ONLY IF PV
INTERCONNECTION
CONSISTS OF LOAD
SIDE BREAKER)
6
10
1 1 1
1
4
5
(ONLY IF PV
INTERCONNECTION
CONSISTS OF LOAD
SIDE BREAKER)
4
6
3
LABELING DIAGRAM:
12
11
8OR
LABEL 6
AT DIRECT-CURRENT EXPOSED RACEWAYS, CABLE TRAYS, COVERS AND ENCLOSURES OF
JUNCTION BOXES, AND OTHER WIRING METHODS; SPACED AT MAXIMUM 10FT SECTION OR
WHERE SEPARATED BY ENCLOSURES, WALLS, PARTITIONS, CEILINGS, OR FLOORS.
[NEC 690.31(G)(3&4)]
LABEL 10
(ONLY IF 3 OR MORE SUPPLY SOURCES TO
A BUSBAR)
SIGN LOCATED AT LOAD CENTER IF IT
CONTAINS 3 OR MORE POWER SOURCES.
[NEC 705.12(D)(2)(3)(C)]
LABEL 9
SIGN LOCATED AT RAPID SHUT DOWN
DISCONNECT SWITCH [NEC 690.56(C)(3)].
LABEL 7
FOR PV SYSTEMS THAT SHUT DOWN THE
ARRAY AND CONDUCTORS LEAVING THE
ARRAY:
SIGN TO BE LOCATED ON OR NO MORE
THAN 3 FT AWAY FROM SERVICE
DISCONNECTING MEANS TO WHICH THE
PV SYSTEMS ARE CONNECTED AND
SHALL INDICATE THE LOCATION OF ALL
IDENTIFIED RAPID SHUTDOWN SWITCHES
IF NOT AT THE SAME LOCATION.
[NEC 690.56(C)(1)(A)]
LABEL 8
FOR PV SYSTEMS THAT ONLY SHUT DOWN
CONDUCTORS LEAVING THE ARRAY:
SIGN TO BE LOCATED ON OR NO MORE
THAN 3 FT AWAY FROM SERVICE
DISCONNECTING MEANS TO WHICH THE
PV SYSTEMS ARE CONNECTED AND
SHALL INDICATE THE LOCATION OF ALL
IDENTIFIED RAPID SHUTDOWN SWITCHES
IF NOT AT THE SAME LOCATION.
[NEC 690.56(C)(1)(B)]
LABEL 11
PLACARD TO BE PLACED AT THE MAIN
BILLING METER PER XCEL ENERGY.
LABEL 12
PLACARD TO BE PLACED AT AC
DISCONNECT PER XCEL ENERGY.
LABEL 1
FOR PV DISCONNECTING MEANS WHERE ALL
TERMINALS OF THE DISCONNECTING MEANS MAY BE
ENERGIZED IN THE OPEN POSITION.
[NEC 690.13(B), NEC 705.22]
LABEL 2
AT EACH DC DISCONNECTING MEANS, INCLUDING THE
DC DISCONNECT AT THE INVERTER.
[NEC 690.53, NEC 690.13(B)]
LABEL 13
SIGN LOCATED AT MAIN SERVICE
DISCONNECTING MEANS IF ALL
ELECTRICAL POWER SOURCE
DISCONNECTING MEANS ARE GROUPED
WITHIN 10' AND LINE OF SITE OF MAIN
SERVICE DISCONNECT [NEC 690.56(B) &
NEC 705.10].
LABEL 14
SIGN LOCATED AT AC COMBINER BOX FOR
ALL MICRO-INVERTER / AC MODULE
INSTALLS (IF APPLICABLE).
13
14
LABELING NOTES:
1.LABELS CALLED OUT ACCORDING TO ALL COMMON CONFIGURATIONS. ELECTRICIAN TO
DETERMINE EXACT REQUIREMENTS IN THE FIELD PER CURRENT NEC AND LOCAL CODES AND
MAKE APPROPRIATE ADJUSTMENTS.
2.LABELING REQUIREMENTS BASED ON THE 2014 NATIONAL ELECTRIC CODE, OSHA STANDARD
19010.145, ANSI Z535.
3.MATERIAL BASED ON THE REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION.
4.LABELS TO BE OF SUFFICIENT DURABILITY TO WITHSTAND THE ENVIRONMENT INVOLVED [NEC
110.21]
5.LABELS TO BE A MINIMUM LETTER HEIGHT OF 3/8", WHITE ON RED BACKGROUND; REFLECTIVE,
AND PERMANENTLY AFFIXED [IFC 605.11.1.1]
3
4
1
32
240
0
0
LABEL 15
PLACARD TO BE PLACED AT AC
BI-DIRECTIONAL METER PER XCEL
ENERGY.
M MSP
AC
C
JB
JB JB
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNPOWER TO THIS BUILDING IS ALSO SUPPLIED FROM ROOF MOUNTED
SOLAR ARRAYS WITH SAFETY DISCONNECTS AS SHOWN:
CAUTION
DIRECTORY
PERMANENT PLAQUE OR DIRECTORY PROVIDING THE LOCATION OF THE
SERVICE DISCONNECTING MEANS AND THE PHOTOVOLTAIC SYSTEM.
(ALL PLAQUES AND SIGNAGE WILL BE INSTALLED AS OUTLINED WITHIN:
NEC 690.56(B)&(C), [NEC 705.10])
DATE: June 1, 2021
PV08
PAGE: SHEET NAME:
PLACARD
DRAWN BY:
SoloCAD
4552 168th St W, Lakeville MN 55044
FRONT OF HOME
PV ARRAY
MAIN DISTRIBUTION
UTILITY DISCONNECT
RAPID SHUTDOWN AC
DISCONNECT SWITCH
SYSTEM UTILIZES
MICROINVERTERS LOCATED
UNDER EACH SOLAR MODULE
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNDATE: May 31, 2021
PV09
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SITE PHOTOS
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SITE PHOTOS:
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNDATE: May 31, 2021
PV09.1
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METER LOCATION /
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SITE PHOTOS:
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNDATE: May 31, 2021
PV09.2
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SITE PHOTOS:
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNDATE: May 31, 2021
PV09.3
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SITE PHOTOS:
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701Xcel Energy MNDATE: May 31, 2021
PV09.4
PAGE: SHEET NAME:
SIDE VIEW/ MSP
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SITE PHOTOS:
SITE INFORMATION: Grace Gathaara 4552 168th St W, Lakeville, MN 55044 MAX CONTINUOUS AC SYSTEM SIZE: 7.672 kW AC DC SYSTEM SIZE: 10.08 kW DC Lat, Long: 44.7049492 , -93.1582950999999 (28) Silfab SIL-360 NX mono PERC PV MODULES (14) AP Systems YC600 INVERTERSCONTRACTOR INFORMATION:Everlight Solar Construction7369 Highway 13 WSavage, MN 55378License# BC771658833.786.4387 ext. 701COMPANY LOGO
DATE: May 31, 2021
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TEST PROCEDURE
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Contact Info and General
1.Name of Customer who owns service, the Xcel Energy “customer of record” for existing services
2.Installation premise address shall match application address
2.1 Address shall match the premise address for existing customer/services
3.Application OID, SRC, or case number assigned to the project
4.A note stating “All testing shall be performed by qualified personnel"
Testing Applicable to all DER
5.The procedure shall provide steps to verify fixed power factor settings for each inverter meet the
project requirements
6.The unintentional islanding test shall at minimum contain the following steps:
6.1 Steps that verify DER system is ready to be energized
6.2 Steps to verify labeling for the Main Service Panel, DER Protection, DC Disconnect, AC disconnect, Utility AC disconnect, Production Meter (when applicable) and other
relevant labelling and signage
6.3 Steps to energize the DER system
6.4 While in normal operation, steps to verify the voltages at the DER AC terminals are within 5% of the combined DER AC voltage ratings and all LEDs, alarms, and/or
LCD codes are “normal”
6.5 While in normal operation, steps to verify that all DER units are operational and producing power
6.6 Steps to simulate the loss of utility source11 for the unintentional islanding test shall be listed
6.6.1 Clearly identify the disconnection device being used to simulate this utility power outage
6.7 Using a voltmeter, verify the voltage at the inverter side of the AC disconnect has dropped to zero
6.7.1 Only customer-owned equipment shall be used for this verification. Xcel Energy will not provide special equipment for this verification. Xcel Energy provided
meters shall not be used for this verification.
6.8 Using an ammeter or the DER’s display/metering, verify the DER has ceased to energize within two seconds. For three phase systems, three phase monitoring may be
required.
7.Verify DER LEDs, alarms, and/or LCD codes are appropriate for loss of Utility source
8.Steps to restore the lost Utility source shall be listed
9.A step to verify that the inverter system delays five (5) minutes before resuming power output after the Utility source is restored shall be listed
CASE #04449327
BAAARRABAAARRAINDUSTRY LEADING WARRANTYAll our products include an industry leading 25-year product workmanship and 30-year performance warranty.35+ YEARS OF SOLAR INNOVATIONLeveraging over 35+ years of worldwide experience in the solar industry, Silfab is dedicated to superior manufacturing processes and innovations such as Bifacial and Back Contact technologies, to ensure our partners have the latest in solar innovation.NORTH AMERICAN QUALITYSilfab is the leading automated solar module manufacturer in North America. Utilizing premium quality materials and strict quality control management to deliver PV modules. BAA / ARRA COMPLIANTSilfab panels are designed and manufactured to meet Buy American Act Compliance. The US State Department, US Military and FAA have all utilized Silfab panels in their solar installations. LIGHT AND DURABLE Engineered to accommodate high wind load conditions for test loads validated up to 4000Pa uplift. The light-weight frame is exclusively designed for wide-ranging racking compatibility and durability.QUALITY MATTERS Total automation ensures strict quality controls during the DOMESTIC OPERATIONSOur 500+ North American team is ready to help our partners win the hearts and minds of customers, providing customer AESTHETICALLY PLEASINGcommercial applications.PID RESISTANTPID Resistant due to advanced cell technology and material selection. In accordance to IEC 62804-1.* Chubb provides error and omission insurance to Silfab Solar Inc.ProudPartner ofSilfab Solar Inc.240 Courtneypark Drive EastMississauga ON L5T 2Y3 CanadaTel +1 905-255-2501 | Fax +1 905-696-0267info@silfabsolar.com | www.silfabsolar.comSilfab Solar Inc.800 Cornwall AveBellingham WA 98225 USATel +1 360-569-4733SIL-360 NX mono PERCTest Conditions STC NOCTModule Power (Pmax) Wp 360 258Maximum power voltage (Vpmax) V 36.6 33.1Maximum power current (Ipmax) A 9.9 7.8Open circuit voltage (Voc) V 44.5 40.4Short circuit current (Isc) A 10.5 8.2% 19.7 17.6Maximum system voltage (VDC) V 1000Series fuse rating A 20Power Tolerance Wp 0 to +10• Sun simulator calibration reference modules from Fraunhofer Institute. Electrical characteristics may vary by ±5% and power by 0 to +10W.SIL-360 NX mono PERC +0.064 %/°C-0.28 %/°C-0.36 %/°CNOCT (± 2°C) 46 °COperating temperature -40/+85 °CSIL-360 NX mono PERCMetric ImperialModule weight 20±0.2 kg 44±0.4 lbsDimensions (H x L x D) 1832 mm x 1000 mm x 38 mm 72.13 in x 39.4 in x 1.5 inMaximum surface load (wind/snow)* 4000 Pa rear load / 5400 Pa front load 83.5/112.8 lb/ft^2Hail impact resistance ø 25 mm at 83 km/h ø 1 in at 51.6 mphCells66 - Si mono-PERC - 5 busbar158.75 x 158.75 mm66 - Si mono-PERC - 5 busbar62.25 x 62.25 inGlass3.2 mm high transmittance, tempered, 0.126 in high transmittance, tempered, Cables and connectors (refer to installation manual)1200 mm ø 5.7 mm, MC4 from Staubli 47.2 in, ø 0.22 (12AWG), MC4 from Staubli BacksheetFrame Anodized Aluminum (Black)Bypass diodesJunction BoxSIL-360 NX mono PERCModule product workmanship warranty 25 years**Linear power performance guarantee30 yearsst year91.6% end 12th year 85.1% end 25th year 82.6% end 30th yearSIL-360 NX mono PERCProductULC ORD C1703, UL1703, CEC listed***, UL 61215-1/-1-1/-2, UL 61730-1/-2, IEC 61215-1/-1-1/-2***. IEC 61730-1/-2***, CSA C22.2#61730-1/-2, IEC 62716Ammonia Corrosion; IEC61701:2011 Salt Mist Corrosion Certifed, UL Fire Rating: Type 2Factory ISO9001:2015All states except CaliforniaModules Per Pallet: 26Pallets Per Truck: 34Modules Per Truck: 8847.87" [200mm]16.67" [423.5mm]38.78" [985mm]2.36" [60mm]38.11" [968mm]Mounting Hole(x4)Drainage (x8)Ø4.2mm (x2)Grounding Hole47.24"[1200mm]39.37" [1000mm]72.13" [1832mm]1.5" [38mm]72.13" [1832mm]1.02" [26mm]0.07" [1.8mm]1.5" [38mm]0.47" [12mm]0.39" [10mm]0.28" [7mm]C C* Warning. Read the Safety and Installation Manual installing and operating modules.**12 year extendable to 25 years subject to regis-tration and conditions outlined under “Warranty” at www.silfabsolar.com.data are available for download at: www.silfabsolar.com/downloads.CaliforniaModules Per Pallet: 26Pallets Per Truck: 32Modules Per Truck: 832Everlight SolarTel 833-786-4387www.everlightsolar.com
THESE SHEETS, DESIGNS, AND SPECS ARE PROPERTY OF SUN INCORPORATED. NO PART SHALL BE DUPLICATED OR USED FOR NONE OTHER THAN ITS SPECIFIC PROJECT WITHOUT WRITTEN CONSENT FROM SUN INCORPORATED.MOUNT SHEETSheet: 5File: \\SUN-SERVER\Sun Incorporated Jobs Master\Equipment\MOUNTS\QUICK MOUNT\QMPV-datasheet-QMHSS-LS-QuickHookSM-web.pdfMissing or invalid referenceSheet: 2File: \\SUN-SERVER\Sun Incorporated Jobs Master\Equipment\MOUNTS\QUICK MOUNT\QMPV-datasheet-QMHSS-LS-QuickHookSM-web.pdfMissing or invalid reference
July 19, 2019 Page 1 of 17 Rev 3.1
Xcel Energy Requirements for DER Application Completeness Review
Applicable to All Xcel Energy Operating Companies
July 19, 2019 Page 2 of 17 Rev 3.1
Table of Contents
1.0 Scope ................................................................................................................................................ 3
2.0 Terms and References ..................................................................................................................... 3
2.1 Glossary ........................................................................................................................................ 3
2.2 References .................................................................................................................................... 3
3.0 One Line Diagram ............................................................................................................................. 4
4.0 Site Plan............................................................................................................................................ 6
5.0 Label Details ..................................................................................................................................... 8
6.0 Test Procedure ................................................................................................................................. 8
7.0 FERC SGIP-Based Interconnection Process Track Eligibility Determination .................................. 10
7.1 Simplified Process ...................................................................................................................... 10
7.2 Fast Track Process ...................................................................................................................... 10
7.3 Study Process ............................................................................................................................. 11
8.0 FERC SGIP-Based Interconnection Process Material Modification Determination ....................... 12
9.0 Revision History ............................................................................................................................. 14
10.0 Document Dependencies ............................................................................................................... 14
10.1 Internal Documents ................................................................................................................ 14
10.2 External Documents ............................................................................................................... 14
Appendix A – Template for Notice of Incomplete Initial Application Materials ...................................... 15
July 19, 2019 Page 3 of 17 Rev 3.1
1.0 Scope
Outlined below are the engineering documents and associated minimum requirements for a
Distributed Energy Resource (DER) interconnection application to be deemed complete. The
requirements apply to all DER for the purpose of providing additional detail on how application
completeness will be reviewed with respect to governing interconnection requirements.
Interconnections using Energy Storage Systems must also follow the Xcel Energy Storage
Interconnection Guidelines in addition to the below requirements. In the context of this document,
“Dedicated Power Production Facility” refers to interconnections that connect directly to the
Distribution System for the sole purpose of exporting energy to the distribution system and do not
have electrical services associated with serving a customer load or premise.
Appendix A – Template for Notice of Incomplete Initial Application Materials provides a notification
template for communicating with Interconnection Customers when their initial application cannot be
deemed complete in accordance with this document.
2.0 Terms and References
Applicable terms and company/industry references are provided below.
2.1 Glossary
Distributed Energy Resource (DER): Distributed Energy Resources (DERs) include all sources, including
energy storage systems. All sources interconnected in parallel with Xcel Energy’s system require an
interconnection review.
Reference Point of Applicability: The location, either the Point of Common Coupling or the Point of
DER Connection, where the interconnection and interoperability performance requirements specified
in IEEE 1547 apply. With mutual agreement, the Area EPS Operator and Customer may determine a
point between the Point of Common Coupling and Point of DER Connection. See Minnesota DER
Technical Interconnection and Interoperability Requirements for more information.
2.2 References
1. Colorado Rule 3667
2. Xcel Energy Section 9 Tariff
3. Xcel Energy Section 10 Tariff
4. New Mexico Interconnection Manual
5. South Dakota PUC Small Generator Facility Interconnection Rules Section 20.10.36
6. Xcel Energy Standard for Electric installation and Use
7. Xcel Energy Storage Interconnection Guidelines
8. National Electric Code
9. UL 1741
July 19, 2019 Page 4 of 17 Rev 3.1
10. IEEE 1547
3.0 One Line Diagram
One-Line diagram, also known as a single-line diagram, showing the installation of the DER system and
associated equipment shall be required with each interconnection application. To reduce the chances
of a delayed deemed-complete status by increasing the overall clarity of the one-line, it is strongly
recommended to use a standard graphical symbol set, such as that found in IEEE 315, when such a
standardized symbol exists. The following information shall be clearly depicted on the one-line
diagram:
Contact information and General
3.1 Name of Customer who owns/will own service, the Xcel Energy “customer of record” for existing
services
3.2 Application OID, SRC, or case number assigned to the project
3.3 Clearly identify the Reference Point of Applicability (RPA) and denote the RPA where test and
verification features will be applied in the written test procedure
3.4 A note indicating that the design shall meet National Electric Code (NEC codes) requirements
3.5 For systems larger than 250 kW, a signature from a professional engineer licensed in Minnesota is
required.
Electrical Component Schematic
3.6 Label and show the electrical layout of all equipment in-line between the main service meter and
the DER system
3.6.1 The equipment listed shall include, at a minimum, switches, breakers, fuses, junction
boxes, combiner boxes, protective devices, etc.
3.6.2 All customer equipment1 shall be located on the customer-side of the main service meter
3.6.2.1 Primary vs secondary interconnection shall be clearly noted and consistent with
all other provided documentation
3.7 Main service meter and main service panel
3.8 Main service protection2 between DER and the utility
3.8.1 The protective device shall be provided immediately after the main service meter
3.9 Electrical ratings3 of all equipment
3.10 The aggregate AC capacity of each DER system
3.11 The electrical ratings of the DER shall be provided
1 Xcel Energy infrastructure is not required to be shown on the customer one-line. Any Xcel Energy equipment shown is
subject to change and should not be used for planning/design purposes by the customer 2 For DER being installed on existing buildings, the main service breaker will typically be sufficient 3 Including, but not limited to, Volts, Amps, number of phases, kW, kVA, winding configurations
July 19, 2019 Page 5 of 17 Rev 3.1
3.11.1 Voltage
3.11.2 Power Output (KVA or kW)
3.11.3 Phases (single or three-phase inverters)
3.12 Clearly note if inverter(s) are UL1741 certified
3.13 When multiple DER units are existing or proposed on a single service: all DER systems shall be
shown with proposed and existing marked
3.14 For energy storage systems: the mode of operation4 being applied for shall be clearly indicated
on the one-line
3.15 The circuit for auxiliary equipment power necessary to the operation of the DER shall be shown
3.16 The Reference Point of Applicability shall be indicated
Metering
3.17 Production meter, if applicable, with ownership noted (utility or customer)
3.17.1 For single-phase installations, the meter shall be specified as 1-phase, 3-wire
3.17.2 For three-phase installations, the meter shall be specified as 3-phase, 4-wire
3.17.3 No loads or energy storage systems shall be connected on the DER side of the production
meter.
3.17.4 All Xcel-owned production meters shall be installed at an Xcel Energy standard voltage5
3.17.5 Production Meter CT polarity should be shown on the drawing as facing the PV, i.e. H1 of
the CT faces the inverter such that DER is seen by the production meter as kWh delivered
3.17.6 When present, customer owned meters shall be clearly noted as “provided by customer”
3.17.6.1 Customer owned meters shall not be located on the DER side of the Xcel Energy
production meter6
3.18 For systems with an output of 200 amps or more: any Xcel-owned metering requiring PTs shall be
shown with the PTs unfused
AC Disconnect
3.19 A visible-open type, lockable, and readily accessible AC disconnect for purposes of isolating the
DER from the utility source labeled “Utility AC Disconnect,” “Photovoltaic Utility AC Disconnect,”
or similar shall be shown
3.19.1 Other AC Disconnects shall not be labeled or identified as a “Utility” AC Disconnect, if
applicable
4 Reference the Xcel Energy Guidelines for Interconnection of Electric Energy Storage found on Xcel Energy’s website for the
full requirements of Energy Storage applications 5 Xcel Energy standard service voltages can be found on Pg. 24, section 3.1.1 of the Electric Standard For Electric Installation
and Use. The inverter side of a step-up transformer may be a non-standard Xcel Energy voltage, provided that no Xcel
Energy metering is located between the step-up transformer and the inverter 6 Refer to applicable state interconnection tariffs and program rules to determine if production meters are applicable
July 19, 2019 Page 6 of 17 Rev 3.1
3.19.2 If the AC disconnect is not located within 10 feet of the main service meter7, a label
meeting all requirements of the “Label Details” section should be placed at the main
service meter clearly showing the location of the AC Disconnect
3.19.3 For installations that require a Production Meter, the Utility AC Disconnect shall be
located between the DER and production meter
3.19.4 For installations not requiring a Production Meter, the Utility AC Disconnect shall be
located between the DER and main service
3.19.5 When multiple DER units are existing or proposed on a single service: if a single Utility AC
Disconnect cannot be used to disconnect all DER, all Utility AC Disconnects should include
numerical identification such as “Utility AC Disconnect 1 of 2” or similar. The number of
disconnects required to be operated to isolate the DER from the utility should be clear.
Ground Referencing (applies only to systems greater than 100 kW)
3.20 Ground referencing8 equipment shall be installed between the main service meter and
production meter to provide a ground reference for the system
3.20.1 Details of the ground reference equipment required on the one-line:
3.20.1.1 Type/winding configuration of ground referencing equipment
3.20.1.2 X0 value
3.20.1.3 X0/R0 ratio
3.20.1.4 Neutral current rating
3.20.1.5 Equipment fault withstand rating
3.20.2 Loss of ground referencing equipment shall immediately trip the DER system offline
3.20.2.1 The method of monitoring and tripping shall be shown on the one-line
4.0 Site Plan
Site Plan or location plan identifying location of equipment noted on the one line shall show the
following information:
Contact Information and General
4.1 Name of Customer who owns/will own the service, the Xcel Energy “customer of record” for
existing services
4.2 Installation premise address
4.2.1 Installation address shall match application address
7 This will be evaluated as an exception, which may or may not be approved based on the accessibility of the AC Disconnect
or the clarity of the placard 8 See the “PV and Inverter-based DER Ground Referencing Requirements and Sample Calculations” document for ground
reference requirements
July 19, 2019 Page 7 of 17 Rev 3.1
4.2.2 Installation address shall match the premise address for existing customer/services
4.2.3 For dedicated power production facility interconnection applications: GPS Coordinates in
WGS 94 decimal degrees, with municipality and county are acceptable in place of an
address when one has not yet been established by the county
4.3 Installer name & contact information
4.4 Application OID, SRC, or case number assigned to the project
4.5 Building(s) and streets shall be labelled
4.5.1 A minimum of one street should be included on the site plan, with the name, distance,
and direction to the nearest cross street, if the nearest cross street is not shown
4.6 Compass direction (indicate North)
4.7 For ground mounted systems: an access road is required to all Xcel Energy equipment, including
production metering and Utility AC disconnects. For systems smaller than 100 kW, an exception
may be sought for this requirement, based on equipment location and accessibility.
4.7.1 The width of this road shall be indicated and cannot be less than 12 feet wide
4.7.2 The drawing shall show the route from a public road to the Xcel Energy equipment
Electrical Component Locations
4.8 Main service entrance, all meter locations, disconnects, transformers, proposed and existing DER
systems
4.8.1 Distance shall be noted between this equipment
4.8.2 Primary vs secondary interconnection shall be clearly noted and consistent with all other
documentation
4.8.3 For dedicated power production facilities: when an overhead primary service
interconnection is used, the customer pole shall be no less than 25’ from the Xcel Energy
meter pole. Typical acceptable distance from the Xcel Energy meter pole to the customer
pole is 40’
4.9 The Production Meter and AC Disconnect should be located together in a readily accessible
location within 10’ of the main service meter
4.9.1 If the AC disconnect or Production Meter is not located within 10 feet of the main service
meter9, a label meeting all requirements of the “Label Details” section should be placed at
the main service meter clearly showing the location of the AC Disconnect
4.10 24/7 unescorted keyless access shall be provided to all Xcel Energy equipment
4.11 Position, distance and clearance concerns of overhead electric service lines and/or other utilities
in relation to the PV panels shall be noted
9 This will be evaluated as an exception, which may or may not be approved based on the accessibility of the AC Disconnect
or the clarity of the placard
July 19, 2019 Page 8 of 17 Rev 3.1
4.12 A separate Detail View or Plan View may be required to clearly show location of meters, main
service and AC disconnect, when the site layout is unclear or illegible when printed on an 11”x17”
sheet
5.0 Label Details
5.1 Labels shall be weatherproof, durable and permanently mounted
5.2 Labels shall demonstrate or state compliance with NEC 690
5.3 A label shall be included on Main Service Meter with the text “Generation System Connected”, or
similar
5.3.1 When an Energy Storage System (ESS) is present, include a label stating that an ESS is
present and equipped with an auto-transfer switch
5.4 Include label “Utility AC Disconnect”, or similar
5.4.1 When multiple DER units are present, if a single Utility AC Disconnect cannot be used to
disconnect all DER, all Utility AC Disconnects should include numerical identification such
as “Utility AC Disconnect 1 of 2” or similar. The number of disconnects required to be
operated to isolate the DER from the utility should be clear.
5.5 When multiple DER units are existing or proposed on a single service: equipment for each system
shall be uniquely identified through labelling (i.e. “PV Unit 1 of 2” or similar)
6.0 Test Procedure
A test procedure that will be used to verify the DER to grid interface protection and operation of the
DER system shall be submitted to Xcel Energy for approval. The procedure shall include an open-phase
test (for three phase systems) and an unintentional island detection test (for all systems) to verify the
system ceases generating in parallel with the Xcel Energy distribution system when the Utility source is
lost. Each system is unique and will require a custom test procedure based on the DER10. In addition to
the manufacturer’s recommendations, the following steps or notes shall be included:
Contact Info and General
6.1 Name of Customer who owns service, the Xcel Energy “customer of record” for existing services
6.2 Installation premise address shall match application address
6.2.1 Address shall match the premise address for existing customer/services
6.3 Application OID, SRC, or case number assigned to the project
6.4 A note stating “All testing shall be performed by qualified personnel”
10 DER Owners may wish to consult with the Manufacturer regarding considerations specific the DER unit of interest.
July 19, 2019 Page 9 of 17 Rev 3.1
Testing Applicable to all DER
6.5 The procedure shall provide steps to verify fixed power factor settings for each inverter meet the
project requirements
6.6 The unintentional islanding test shall at minimum contain the following steps:
6.6.1 Steps that verify DER system is ready to be energized
6.6.2 Steps to verify labeling for the Main Service Panel, DER Protection, DC Disconnect, AC
disconnect, Utility AC disconnect, Production Meter (when applicable) and other relevant
labelling and signage
6.6.3 Steps to energize the DER system
6.6.4 While in normal operation, steps to verify the voltages at the DER AC terminals are within
5% of the combined DER AC voltage ratings and all LEDs, alarms, and/or LCD codes are
“normal”
6.6.5 While in normal operation, steps to verify that all DER units are operational and producing
power
6.6.6 Steps to simulate the loss of utility source11 for the unintentional islanding test shall be
listed
6.6.6.1 Clearly identify the disconnection device being used to simulate this utility power
outage
6.6.7 Using a voltmeter, verify the voltage at the inverter side of the AC disconnect has dropped
to zero
6.6.7.1 Only customer-owned equipment shall be used for this verification. Xcel Energy
will not provide special equipment for this verification. Xcel Energy provided
meters shall not be used for this verification.
6.6.8 Using an ammeter or the DER’s display/metering, verify the DER has ceased to energize
within two seconds. For three phase systems, three phase monitoring may be required.
6.7 Verify DER LEDs, alarms, and/or LCD codes are appropriate for loss of Utility source
6.8 Steps to restore the lost Utility source shall be listed
6.9 A step to verify that the inverter system delays five (5) minutes before resuming power output
after the Utility source is restored shall be listed
Testing Applicable only to Three-Phase systems
6.10 For three-phase systems, steps to simulate an open phase condition from the utility shall be
included. The device used to create an open phase shall be clearly identified in the procedure.
6.10.1 If ground referencing equipment is present, the open point must occur upstream of this
device (upstream meaning in the direction of the utility source)
11 This typically involves opening an AC disconnect.
July 19, 2019 Page 10 of 17 Rev 3.1
6.10.2 If the protection scheme used to detect the open phase uses devices other than the
inverter (for instance, separate relaying to trip a VFI or breaker), the installer must
provide an engineering analysis that demonstrates a non-detection zone does not exist
when the output of the DER is 5% or greater of the aggregate inverter AC nameplate
rating in the open-phase detection schemes. A step will be required to disable this setting
during testing if an acceptable engineering analysis cannot be provided.
6.11 Steps to verify voltage and current are to be listed for the open-phase test. Location of
measurement points shall be identified.
7.0 FERC SGIP-Based Interconnection Process Track Eligibility
Determination
For those states and Operating Companies using interconnection procedures based on the FERC Small
Generator Interconnection Process (SGIP), it is necessary to verify an Interconnection Customer has
correctly selected the appropriate interconnection application review process. Process tracks are tied
to application fees and review timelines.
7.1 Simplified Process
To qualify for the simplified interconnection process, the proposed DER must utilize a certified inverter
based equipment package. Compliance with the UL1741 certification is likely indicated by the
Interconnection Customer on the application form, but shall still be verified by an engineering review
of the provided documentation.
Simplified process thresholds are as follows for SGIP based states:
7.1.1 Colorado: 10kW or less
7.1.2 Minnesota: 20kW or less
7.1.3 New Mexico: 10kW or less
7.1.4 South Dakota: 10kW or less
7.2 Fast Track Process
Interconnection applications for the fast track process may utilize certified or non-certified equipment.
Process thresholds vary by state as follows:
7.2.1 Colorado: Maximum DER size is no larger than two (2) MW. Also note the proposed DER
shall meet the codes, standards, and certification requirements as noted in the rules.
7.2.2 Minnesota: Section 3.1 of the Minnesota Interconnection Procedures (MIP) provides
detail around fast track process thresholds. Note that synchronous and induction
machines are always limited to two (2) MW or less in order to be fast track eligible. For
inverter-based generation, use information available in GIS to determine feeder line
voltage and distance in line miles to the appropriate substation, then input those values
July 19, 2019 Page 11 of 17 Rev 3.1
into Table 1. For process eligibility, the mainline should be considered to be the main
trunk of the circuit protected from a substation protective device.
Fast Track Eligibility for Distributed Energy Resources
Line Voltage Fast Track Eligibility12
Regardless of Location
Fast Track Eligibility for
certified, inverter-based
DER on a Mainline13
and ≤2.5 Electrical Circuit
Miles from Substation14
<5 kV ≤500 kW ≤500 kW
≥5 kV and <15 kV ≤1 MW ≤2 MW
≥15 kV and <30 kV ≤3 MW ≤4 MW
≥30 kV and ≤69 kV ≤4 MW ≤5 MW
Table 1 - Process Eligibility Determination
7.2.3 New Mexico: Maximum DER size is no larger than two (2) MW. Also note the proposed
DER shall meet the codes, standards, and certification requirements as noted in the state
interconnection manual.
7.2.4 South Dakota: Maximum DER size is no larger than two (2) MW. Additional considerations
are outlined in the Tier 2 and Tier 3 process requirements.
7.3 Study Process
Interconnection requests not meeting eligibility requirements of the simplified or fast track processes
will typically require a more detailed engineering study. Subject to the limits in 7.3.1 to 7.3.4, these
projects will follow their respective state rules and tariffs for interconnection technical review.
7.3.1 Colorado: For DER interconnections between two (2) MW and no larger than ten (10)
MW, and any interconnection application that fails the review screens of Level 1 or Level
2 processes.
7.3.2 Minnesota: For DER applications up to ten (10) MW that do not qualify for simplified or
fast track processes, or that fail the initial and supplemental review screens.
12 Synchronous and induction machines eligibility is limited to no more than 2MW even when line voltage is greater than 15
kV. 13 For purposes of this table, a Mainline is the three-phase backbone of a circuit. It will typically constitute lines with wire
sizes of 4/0 American wire gauge, 266 kcmil, 336.4 kcmil, 397.5 kcmil, 477 kcmil and 795 kcmil. 14 An Interconnection Customer can determine this information about its proposed interconnection location in advance by
requesting a pre-application report pursuant to MIP Section 1.4.
July 19, 2019 Page 12 of 17 Rev 3.1
7.3.3 New Mexico: For DER interconnections up to ten (10) MW that either do not qualify for or
fail the initial review screens contained in simplified and fast track processes.
7.3.4 South Dakota: For DER interconnections up to ten (10) MW that do not qualify for or fail
the initial review screens of the Tier 1, 2, or 3 processes.
8.0 FERC SGIP-Based Interconnection Process Material Modification
Determination
For those states and Operating Companies using interconnection procedures based on the FERC Small
Generator Interconnection Process (SGIP), it is necessary to determine whether changes to a DER
proposed by an Interconnection Customer constitute a Material Modification. Material Modifications
encompass any changes to an interconnection application which has been deemed complete that alter
machine data, equipment configuration, or site layout. Specifically, such changes must have a material
impact on cost, timing, or design of interconnection facilities15 or upgrades16 on the project under
consideration or any later queued project. Material Modifications may also impact the safety or
reliability of the Company’s system. Material Modifications apply to DER units after they are granted
permission to operate.
A Material Modification shall include:
1) Changes the physical location of the point of common coupling; such that it is likely to have an
impact on technical review;
2) Increases the nameplate rating or output characteristics of the Distributed Energy Resource;
3) Changes or replaces generating equipment, such as generator(s), inverter(s), transformers,
relaying, controls, etc., and substitutes equipment that is not like-kind substitution in
certification, size, ratings, impedances, efficiencies or capabilities of the equipment;
4) Changes transformer connection(s) or grounding; and/or
5) Changes to a certified inverter with different specifications or different inverter control settings
or configuration.
15 Interconnection Facilities – The Company’s Interconnection Facilities and the Interconnection Customer’s
Interconnection Facilities. Collectively, Interconnection Facilities include all facilities and equipment between the DER and
the Point of Common Coupling, including any modification, additions or upgrades that are necessary to physically and
electrically interconnect the DER to the Company’s System. Some examples of Customer Interconnection Facilities include:
supplemental DER devices, inverters, and associated wiring and cables up to the Point of DER Connection. Some examples
of Company Interconnection Facilities include sole use facilities; such as, line extensions, controls, relays, switches,
breakers, transformers and shall not include Distribution Upgrades or Network Upgrades. 16 Upgrades – The required additions and modifications to the Company’s Transmission or Distribution System at or beyond
the Point of Interconnection. Upgrades may be Network Upgrades or Distribution Upgrades. Upgrades do not include
Interconnection Facilities.
July 19, 2019 Page 13 of 17 Rev 3.1
A Material Modification shall NOT include:
1) Changes the ownership of a Distributed Energy Resource;
2) Changes the address of the Distributed Energy Resource, so long as the physical point of common
coupling remains the same;
3) Changes or replaces generating equipment such as generator(s), inverter(s), solar panel(s),
transformers, relaying, controls, etc. and substitutes equipment that is a like-kind substitution in
certification, size, ratings, impedances, efficiencies or capabilities of the equipment; and/or
4) Increases the DC/AC ratio but does not increase the maximum AC output capability of the
Distributed Energy Resource in a way that is likely to have an impact on technical review.
July 19, 2019 Page 14 of 17 Rev 3.1
9.0 Revision History
Revision Date Prepared By Approved By Notes
2.0 JCH
Converted to standard
format/layout, added
several sections
10.0 Document Dependencies
10.1 Internal Documents
1. Colorado Rule 3667
2. Xcel Energy Section 9 Tariff
3. Xcel Energy Section 10 Tariff
4. New Mexico Interconnection Manual
5. South Dakota PUC Small Generator Facility Interconnection Rules Section 20.10.36
6. Xcel Energy Standard for Electric installation and Use
7. Xcel Energy Storage Interconnection Guidelines
10.2 External Documents
1. National Electric Code
2. UL1741
July 19, 2019 Page 15 of 17 Rev 3.1
Appendix A – Template for Notice of Incomplete Initial Application Materials
If a DER interconnection application is incomplete, complete the form on the following page and
provide a copy to the responsible Program Manager. The Program Manager will then communicate
with the Interconnection Customer to address any issues within the required timeframe. Save a copy
of this form in the appropriate engineering folder for the project.
July 19, 2019 Page 16 of 17 Rev 3.1
July 19, 2019
To Whom it May Concern:
Regarding your DER interconnection request for application number(s):
____________________________________________________________________________________
in the state of ___________________________, we are writing to inform you that one or more aspects
of your application are not complete and require action to update before we can proceed with more
detailed engineering reviews. Missing information is noted below under the relevant section heading.
Section 3.0 One Line Diagram
Section 4.0 Site Plan
Section 5.0 Label Details
July 19, 2019 Page 17 of 17 Rev 3.1
Section 6.0 Test Procedure
Section 7.0 FERC SGIP-Based Interconnection Process Track Eligibility Determination
Are provided UL1741 certification documents sufficient: ☐ Yes ☐ No
Please update your relevant application documents and resubmit for Xcel Energy review in accordance
with the governing interconnection process timelines.