HomeMy WebLinkAboutLA201527-Approved Nicole Austin ENG CAD-min814 E 1475 N
Lehi, UT 84043
m: (309) 645-0999
Solar Professional Engineering Consulting 2022.04.20 admin@lucenteng.co
Everlight Solar
PO Box 930550
Verona, WI 53593
RE: Engineering Services
Austin Residence
10716 202nd Street West, Lakeville, MN
16.99 kW System
Solo Job #2034156
To Whom It May Concern,
A. Assumptions from Field Observation provided by Everlight Solar
Roof Roof B
Roof Finish :Asphalt Shingle Asphalt Shingle
Roof Underlayment :OSB OSB
Roof Profile :Hip Gable Hip Gable
Roof Structural System :Metal Plate Trusses Metal Plate Trusses
Truss Top Chord/Setup :2 x 4 / Modified Queen 2 x 4 / Modified Queen
Chord/Rafter Wood Grade :Doug-Fir #1 or better Doug-Fir #1 or better
Truss/Rafter Spacing :24'' o.c.24'' o.c.
Roof Slope :30 deg 30 deg
Max Top Chord/Rafter Span :6.95 ft 6.95 ft
Bearing Wall Type :Convl Lt-Frame Constr CLFC
Foundation :Permanent Concrete Permanent Concrete
Stories :Single Single
B. Building Design Criteria
Code : 2018 IRC (ASCE 7-16)Risk Category : II
Roof Live Load : 20 psf (0 psf at panels)Occupancy Class : R-3
Ground Snow Load : 50 psf Roof Dead Load : 6.5 psf
Ult Wind Speed : 115 mph PV Dead Load : 3 psf
Exposure Category : C Total Dead Load : 9.5 psf
C. Summary of Existing Structure Results
Roof
- Adaquate to support the additional imposed loads. No structural upgrades are required.
Lucent Engineering, P.C.
April 25, 2022
We have reviewed the following information regarding the solar panel installation for this project. Alterations to
these documents or plans shall not be made without direct written consent of the Engineer of Record.
The following structural design regarding the proposed alterations have been prepared from these
assumptions. The verification of the field observations is the responsibility of the contractor. Prior to
commencement of work, the contractor shall verify the framing sizes, spacings, and spans noted in the
sealed plans, calculations, and/or certification letter and notify the Engineer of Record of any
discrepancies.
After review of the field observations and based on our calculations and in accordance with the
applicable building codes and current industry standards, the existing roof structure supporting the
proposed alterations consisting of the solar array has been determined to be:
D. Solar Panel Support Bracket Anchorage
1.
2.Manufacturer's Panel Bracket Connection to Roof Chord/Rafter Member:
Fastener : (1) 5/16'' Lag Screw per Bracket
NDS Withdrawl Value : 266 lbs/inch
Min. Thread Length and Pentration Depth : 2.5''
3.
4.
E. Overall Summary
Sincerely,
John H. Leesman, PE
License No. 59214
Limits of Scope of Work and Liablity
Page 2 of 2
Austin Residence
Should you have any questions regarding this letter or if you require further information, do not hesitate to
contact me.
Considering the existing roof's slope, size, spacing, condition, and calculated loads, the panel
bracket supports shall be placed no greater than 48 in. o/c.
Panel supports connections shall be staggered to distribute load to adjacent trusses.
Solar panels shall be designed, mounted, and installed in accordance with the most recent ''Ironridge
Manual'', which can be found on the Ironridge website (http://ironridge.com).
Based on the information supplied to us at the time of this report, on the evaluation of the existing structure, and
solar array panel bracket connection, it is our opinion that the roof system will adequately support the additional
loads imposed by the solar array. This evaluation conforms to 2018 IRC and current industry standards.
The existing structure is assumed to have been designed and constructed following appropriate codes at the
time of erection and assumed to have appropriated permits. The calculations performed are only for the roof
framing supporting the solar array installation referenced in the stamped plans and were completed according
to generally recognized structural analysis standards and procedures, professional engineering, and design
experience opinions and judgements. Existing deficiencies which are unknown or were not observed during the
time the site observation are not included in this scope of work. All solar panel modules, racking, and
mounting equipment shall be designed and installed per the manufacturer's approved installation specifications.
The Engineer of Record and the engineering consulting firm assume no responsibility for misuse or improper
installation. This analysis is not stamped for water leakage. Framing was determined on information in
provided plans and/or photos, along with engineering judgement. Prior to commencement of work, the
contractor shall verify the framing sizes, spacings, and spans noted in the stamped plans, calculations, and/or
certification letter and notify the Engineer of Record of any discrepancies prior to starting construction. 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. The contactor shall also verify that there are no
damage/deficiencies (i.e., dry rot, water damage, termite damage, framing member/connection damage, etc.) to
framing that was not addressed in the stamped plans, calculations, and/or certification letter and notify the
Engineer of Record of any concerns prior to starting construction.
Lucent Engineering, P.C.April 25, 2022
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
COVER PAGE - PV01
DRAWN BY: SoloCAD
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.
PHOTOVOLTAIC (PV) SYSTEM SPECIFICATIONS
AERIAL VIEW:
OCCUPANCY: R-3
ZONING: RESIDENTIAL
STREET VIEW:
GENERAL NOTES
APPLICABLE GOVERNING CODES SITE SPECIFICATIONS
2020 NEC
2020 MRC
2020 MFC
2020 MBC
EQUIPMENT:
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
RACKING: Quickbolt - 48" O.C.
PV01 COVER PAGE
PV02 SITE PLAN
PV03 ROOF ATTACHMENTS
PV04 MOUNTING DETAIL
PV05 LINE DIAGRAM
PV06 ELECTRICAL CALCS
PV07 LABELS
PV08 PLACARD
PV09 SITE PHOTOS
SHEET INDEX:
MMSP
AC
PV
C
JB
JB
JB
JB
JB
AC
MMSP
AC
PV
C
JB
JB
JB
JB
JB
AC
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
FRONT OF HOME
10716 202nd Street West
VISIBLE, LOCKABLE,
LABELED AC DISCONNECT
LOCATED WITHIN 10'
OF UTILITY METER
SOLAR ARRAY INVERTERS
BEHIND PANELS
SITE PLAN - PV02
DRAWN BY: SoloCAD
MP1
MP2
MP3
MP4
MP5
ARRAY DETAILS:
MOUNTING PLANE:AZIMUTH:TILT:
MP1 92°30°
MP2 92°30°
MP3 182°30°
MP4
MP5
272°30°
272°30°
CASE #: 04924152
NO CLEARANCE ISSUES AROUND HOME
OR SOLAR ARRAY
EQUIPMENT LEGEND:
INVERTERVISIBLE, 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
BATT BATTERY(IES)
SUB SUB PANEL
344'-0"
127'-8"
UTILITY AC DISCONNECT
24/7 UNESCORTED KEYLESS
ACCESS SHALL BE PROVIDED
TO XCEL ENERGY FOR ALL
XCEL ENERGY OWNED
METERS AND DISCONNECTS
MAIN SERVICE PANEL
LOCATED INSIDE
ALL PV EQUIPMENT INSTALLED
WITHIN 10' OF UTILITY METER
Kensington Way
223ft SW
MMSP
AC
PV
C
JB
JB
JB
JB
JB
AC
EQUIPMENT INFORMATION:ROOF INFO:PHOTOVOLTAIC ARRAY STRUCTURAL CRITERIA:
RAIL MANUFACTURER:IronRidge ROOF TYPE:Asphalt Shingle PV MODULE COUNT:61
RAIL PART NUMBER:XR-10 ROOF FRAMING:Manufactured Truss ARRAY AREA:MODULE COUNT * 19.83 ft² = 1209.63
ATTACHMENTS Quickbolt RAFTER/TOP CHORD SIZE:2x4 ROOF AREA:5000 ft²
ATTACHMENT QTY:124 RAFTER/TOP CHORD SPACING:24"PERCENT OF ROOF COVERED:24%
SPLICE QTY:20 ATTACHMENT SPACING:48''ARRAY WEIGHT:MODULE COUNT * 45 lbs = 2745 lbs
MIDCLAMP QTY:94 DISTRIBUTED LOAD:ARRAY LBS/ATTACHMENTS = 22.14
ENDCLAMP QTY:56 POINT LOAD: (lbs/ft²)(ARRAY) WEIGHT/AREA = 2.27 lbs/ft²
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
ROOF ATTACHMENTS - PV03
DRAWN BY: SoloCAD
3'-0" TYP
1'-6" TYP
1'-6" TYP
RAIL
L-FOOT/ATTACHMENT BRACKET
(E) ROOF FRAMING
QUICKBOLT
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 & QUICKBOLT
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
EQUIPMENT INFORMATION:ROOF INFO:PHOTOVOLTAIC ARRAY STRUCTURAL CRITERIA:
RAIL MANUFACTURER:IronRidge ROOF TYPE:Asphalt Shingle PV MODULE COUNT:61
RAIL PART NUMBER:XR-10 ROOF FRAMING:Manufactured Truss ARRAY AREA:MODULE COUNT * 19.83 ft² = 1209.63
ATTACHMENTS Quickbolt RAFTER/TOP CHORD SIZE:2x4 ROOF AREA:5000 ft²
ATTACHMENT QTY:124 RAFTER/TOP CHORD SPACING:24"PERCENT OF ROOF COVERED:24%
SPLICE QTY:20 ATTACHMENT SPACING:48''ARRAY WEIGHT:MODULE COUNT * 45 lbs = 2745 lbs
MIDCLAMP QTY:94 DISTRIBUTED LOAD:ARRAY LBS/ATTACHMENTS = 22.14
ENDCLAMP QTY:56 POINT LOAD: (lbs/ft²)(ARRAY) WEIGHT/AREA = 2.27 lbs/ft²
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
MOUNTING DETAIL - PV04
DRAWN BY: SoloCAD
J-BOX
STRING (1): 15.96 A AC, 14 MODULES
STRING (2): 15.96 A AC, 14 MODULES
N
G
3
AC COMBINER BOX
SOLAR LOADS ONLYUL 1741 COMPLIANT
(5) 20A-2P
AC
DC
AC
DC7 INVERTERS
J-BOX
(N) 125A
STRING (3): 15.96 A AC, 14 MODULES
STRING (4): 15.96 A AC, 14 MODULES
STRING (5): 6.84 A AC, 5 MODULES
J-BOX
J-BOX
J-BOX
J-BOX1 2
1 2
1 2
1 2
1 2
AC
DC
AC
DC7 INVERTERS
AC
DC
AC
DC7 INVERTERS
AC
DC
AC
DC7 INVERTERS
AC
DC
AC
DC3 INVERTERS
4
(E) LOADS
N
G
(E)GROUNDING
ELECTRODE
SUPPLY SIDE CONNECTION:
NEC 230.46, NEC 230.79,
NEC 705.12(A).
K4977-INT MILBANK
LUG KIT TO BE ADDED
(E) 200A-2P
(E) 200A MAIN SERVICE PANEL
(E)
(E)UTILITY METER
120/240 VAC
TO UTILITY GRID
1-PH, 240V RATED SERVICE
LUG KIT CANNOT BE SPLICING TYPE
UTILITY PV
PRODUCTION
METER
LOAD SIDE
4 4 4
(N) 90A FUSES
VISIBLE-OPEN TYPE,
LOCKABLE, READILY
ACCESSIBLE, LABELED,
240V, 2-POLE
VISIBLE-OPEN TYPE,
LOCKABLE, READILY
ACCESSIBLE, LABELED,
240V, 2-POLE, FUSED
100A100A
LINE SIDE
1-PH, 3-WIRE,
120/240V, 200A
NO LOADS OR STAGE
SYSTEM ON DER SIDE OF
PRODUCTION METER
THE PV PRODUCTION
METER SOCKET MUST
HAVE LEVER BYPASS
REFERENCE POINT OF APPLICABILITY
UTILITY AC
DISCONNECT
PHOTOVOLTAIC AC
DISCONNECT
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
LINE DIAGRAM - PV05
DRAWN BY: SoloCAD
AP Systems YC600 Specs
MAX INPUT VOLTAGE:55 V
MAX DC SHORT CIRCUIT CURRENT:12 A
MAXIMUM OUTPUT POWER:548 W
MAXIMUM OUTPUT CURRENT:2.28 A
NOM. OUTPUT VOLTAGE:240 V
MAX UNITS PER 20A CIRCUIT:7
1-Phase, 60 HZ, UL 1741 Listed
Mission Solar MSE345SX5T Specs
POWER MAX (PMAX):345W
OPEN CIRCUIT VOLTAGE (VOC):41V
MAX POWER-POINT CURRENT (IMP):10.34A
MAX POWER-POINT VOLTAGE (VMP):33.37V
SHORT CIRCUIT CURRENT (ISC):10.92A
SERIES FUSE RATING:20A
CASE #:
VISIBLE, LOCKABLE,
LABELED AC DISCONNECT
LOCATED WITHIN 10'
OF UTILITY METER
Conduit & Conductor Schedule
TAG QTY WIRE GAUGE DESCRIPTION CONDUIT SIZE
1 (2)12-2 TC-ER, THWN-2, COPPER (L1, L2)N/A - FREE AIR(1)6 AWG THWN-2 COPPER - (GROUND)
2 (2)10 AWG THHN/THWN-2, COPPER - (L1, L2)3/4" EMT(1)10 AWG THWN-2 COPPER - (GROUND)
3 (10)10 AWG THHN/THWN-2, COPPER - (L1, L2)1" EMT(1)10 AWG THWN-2 COPPER - (GROUND)
4 (3)3 AWG THWN-2 COPPER - (L1, L2, NEUTRAL)1" EMT(1)8 AWG THWN-2 COPPER - (GROUND)
DESIGN SHALL MEET NEC REQUIREMENTS
Equipment Schedule
TYPE:QTY:DESCRIPTION:RATING:
MODULES:(61)Mission Solar MSE345SX5T 345 W
INVERTERS:(31)AP Systems YC600 548 W
AC DISCONNECTS:(1)PV AC Disconnect, 240V, 2-Pole 100 A
04924152
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.
GROUNDING & GENERAL NOTES:
1. PV INVERTER IS UNGROUNDED, TRANSFORMER-LESS TYPE.
2. DC GEC AND AC EGC TO BE 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.
STRING CALCULATIONS
MAX AC CURRENT:
MICRO INVERTERS IN SERIES
NOMINAL STRING VOLTAGE:
MAX AC OUTPUT POWER
ARRAY DC POWER:
TOTAL MAX AC CURRENT:
STRING #1
15.96A
7
240V
3836W
21045W
70.68A
STRING #3
15.96A
7
240V
3836W
STRING #2
15.96A
7
240V
3836W
STRING #5
6.84A
3
240V
1644W
STRING #4
15.96A
7
240V
3836W
AP Systems YC600
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
ELECTRICAL CALCS - PV06
DRAWN BY: SoloCAD
Conduit & Conductor Schedule
TAG QTY WIRE GAUGE DESCRIPTION CONDUIT SIZE CONDUCTOR RATING CONDUCTOR TEMP. RATE AMBIENT TEMP TEMP. DERATE # OF CONDUCTORS
DERATE
CONDUCTOR RATING
W/DERATES CONDUIT FILL
1 (2)12-2 TC-ER, THWN-2, COPPER (L1, L2)N/A - FREE AIR 30A 90°C 32°C 0.96 N/A - FREE AIR 28.8A N/A - FREE AIR(1)6 AWG THWN-2 COPPER - (GROUND)
2 (2)10 AWG THHN/THWN-2, COPPER - (L1, L2)3/4" EMT 40A 90°C 32°C 0.96 1 38.4A 11.9%(1)10 AWG THWN-2 COPPER - (GROUND)
3 (10)10 AWG THHN/THWN-2, COPPER - (L1, L2)1" EMT 40A 90°C 32°C 0.96 0.5 19.2A 26.9%(1)10 AWG THWN-2 COPPER - (GROUND)
4 (3)3 AWG THWN-2 COPPER - (L1, L2, NEUTRAL)1" EMT 100A 75°C 32°C 0.96 1 96A 38.1%(1)8 AWG THWN-2 COPPER - (GROUND)
SYSTEM OCPD CALCULATIONS
INVERTER MODEL(S):AP Systems YC600
# OF INVERTERS:31
MAX OUTPUT CURRENT:2.28A
(# OF INVERTERS) X (MAX OUTPUT CURRENT) X 125% <= OCPD RATING
(31 X 2.28A X 1.25) = 88.35A <= 90A, OK
SUPPLY SIDE INTERCONNECTION
MAIN BUSBAR RATING:200A
MAIN DISCONNECT RATING:200A
PV OCPD RATING:90A
SERVICE RATING >= PV OCPD
200A >= 90A, OK, OK
NUMBER OF CURRENT CARRYING CONDUCTORS PERCENT OF VALUES
4-6 .80
7-9 .70
10-20 .50
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
LABELS - PV07
DRAWN BY: SoloCAD
PRODUCTION METER
LABEL 15
PLACARD TO BE PLACED AT
BI-DIRECTIONAL METER PER XCEL
ENERGY.
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
WARNING!
TERMINALS ON THE LINE AND
LOAD SIDES MAY BE ENERGIZED
IN THE OPEN POSITION
ELECTRIC SHOCK HAZARD
!
RATED AC OUTPUT CURRENT A
NOMINAL OPERATING AC VOLTAGE V
PHOTOVOLTAIC SYSTEM
AC DISCONNECT !
WARNING!
WARNING: PHOTOVOLTAIC
POWER SOURCE
TURN RAPID SHUTDOWN
SWICH TO THE "OFF"
POSITION TO SHUT DOWN
PV SYSTEM AND REDUCE
SHOCK HAZARD IN ARRAY
SOLAR PV SYSTEM EQUIPPED
WITH RAPID SHUTDOWN
SOLAR ELECTRIC
PV PANELS
TURN RAPID SHUTDOWN
SWITCH TO THE "OFF"
POSITION TO SHUT DOWN
CONDUCTORS OUTSIDE
THE ARRAY. CONDUCTORS
WITHIN THE ARRAY REMAIN
ENERGIZED IN SUNLIGHT
SOLAR PV SYSTEM EQUIPPED
WITH RAPID SHUTDOWN
SOLAR ELECTRIC
PV PANELS
!
RAPID SHUTDOWN
SWITCH FOR
SOLAR PV SYSTEM
!WARNING
THIS EQUIPMENT IS FED BY MULTIPLE
SOURCES. TOTAL RATING OF ALL
OVERCURRENT DEVICES, EXCLUDING
MAIN SUPPLY OVERCURRENT
DEVICE, SHALL NOT EXCEED
AMPACITY OF BUSBAR.
PHOTOVOLTAIC
SYSTEM CONNECTED
UTILITY AC DISCONNECT
RAPID SHUTDOWN TEST
NOT REQUIRED!CAUTION!
ALL ELECTRIC POWER SOURCE
DISCONNECTING MEANS GROUPED
AND LABELED WITHIN 10 FT AND
LINE OF SIGHT OF THIS LOCATION
DIRECT CURRENT
PHOTOVOLTAIC POWER SOURCE
MAXIMUM VOLTAGE:VDC
MAX CIRCUIT CURRENT:AMPS
NO DC WIRES PRESENT
!WARNING
INVERTER OUTPUT CONNECTION
DO NOT RELOCATE
THIS OVERCURRENT
DEVICE
DUAL POWER SUPPLY
SOURCES: UTILITY GRID AND PV
SOLAR ELECTRIC SYSTEM
0
0
71
240
MMSP
AC
PV
C
JB
JB
JB
JB
JB
AC
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
POWER 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])
RAPID SHUTDOWN AC
DISCONNECT SWITCH
10716 202nd Street West, Lakeville MN 55044
FRONT OF HOME
PLACARD - PV08
DRAWN BY: SoloCAD
COMBINER
MAIN DISTRIBUTION
UTILITY DISCONNECT
PV ARRAY
SYSTEM UTILIZES MICROINVERTERS LOCATED UNDER EACH MODULE
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
SITE PHOTOS:
SITE PHOTOS - PV09
DRAWN BY: SoloCAD
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
SITE PHOTOS:
FRONT/BACK VIEWS - PV09.1
DRAWN BY: SoloCAD
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
SITE PHOTOS:
SIDE VIEWS - PV09.2
DRAWN BY: SoloCAD
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
SITE PHOTOS:
METER/OPEN MSP - PV09.3
DRAWN BY: SoloCAD
Everlight Solar Construction
7369 Highway 13 W
Savage, MN 55378
License# BC771658
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Nicole Austin
10716 202nd Street West
Lakeville, MN 55044
AC SYSTEM SIZE: 16.988 kW AC
DC SYSTEM SIZE: 21.045 kW DC
Lat, 44.6563879
Long, -93.2829241
(61) Mission Solar MSE345SX5T PV MODULES
(31) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
April 22, 2022
DRAWN BY: SoloCAD
TEST PROCEDURE
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 #:04924152
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
May 25, 2021 Page 1 of 11
Xcel Energy Requirements for DER
Application Completeness Review
Applicable to Xcel Energy Minnesota
May 25, 2021 Page 2 of 11
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 ......................................................................................................................................... 7
5.0 Revision History ............................................................................................................................. 9
6.0 Document Dependencies ............................................................................................................... 9
6.1 Internal Documents .................................................................................................................... 9
6.2 External Documents ................................................................................................................... 9
Appendix A – Template for Notice of Incomplete Initial Application Materials ...................................... 10
May 25, 2021 Page 3 of 11
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. Xcel Energy Section 9 Tariff
2. Xcel Energy Section 10 Tariff
3. Xcel Energy Standard for Electric installation and Use
4. Xcel Energy Storage Interconnection Guidelines
5. National Electric Code
6. UL 1741
7. IEEE 1547
May 25, 2021 Page 4 of 11
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 Customer Name.
Note: The Customer Name on the one‐line should match the Customer Name on the
application.
3.2 Application OID, SRC, or case number assigned to the project
3.3 Clearly identify the Reference Point of Applicability (RPA). This is the location that the DER system
will meet the requirements of IEEE 1547.
Note: For practical purposes, indicating the location that measurements will be taken as
the “RPA” for the witness test is sufficient to satisfy this requirement in most cases. If
measurements are being taken at a disconnect, it should be clear which side of the
disconnect measurements are being taken.
3.4 For systems larger than 250 kW, a signature from a professional engineer licensed in Minnesota is
required.
Electrical Component Schematic
3.5 The electrical connections of all major components between the main service meter1 and the DER
system.
Note: Examples of major components include interconnection transformers, breakers,
fuses, reclosers, meters, current transformers2, potential transformers, and inverters.
Note: All customer equipment shall be located on the customer‐side of the main service
meter
Note: All Dedicated Power Production Facilities require a dedicated transformer with no
other associated load or DER interconnections.
1 Xcel Energy infrastructure is not required to be shown on the customer one‐line. Any Xcel Energy equipment shown is
subject to change at Xcel Energy’s discretion and should not be used for planning/design purposes by the customer
2 CT polarity should be clearly marked on the drawing.
May 25, 2021 Page 5 of 11
3.6 Main service meter and main service panel
Note: Breakers serving only load do not need to be shown in detail, but some indication
that load is served from the main service panel, or any other panel in the drawing, is
requested. The presence of another breaker is enough to indicate to the reviewer that
additional load is served from this panel.
3.7 Main service protection between DER and the utility
Note: This protective device shall be provided immediately after the main service meter.
Typical protective devices include circuit breakers and fuses. An unfused disconnect is not
considered a protective device. When connected behind a main service panel, the main
service breaker will suffice as the protective device.
3.8 The main service meter voltage and number of phases, and if present, any transformer winding
configuration and voltages. Please do not include any instrument transformer ratios.
3.9 The aggregate kW AC nameplate rating of each DER system
Note: For example, this will be the sum of all inverters present on a PV system.
3.10 The AC Voltage of the DER System
3.11 The expected individual kW AC nameplate rating of each inverter of the system
Note: Effort should be made to include the most accurate inverter model at the time of
application submission, as it adds greater clarity to the expected performance and
operation of the system, reducing the likelihood of additional requests for information at
the next step in the process. However, it is expected that designs may be non‐materially
modified after application submission and prior to commissioning. This includes the
inverters models. Some flexibility will be provided for this requirement, but final one‐lines
will need final inverter makes and models prior to permission to operate being granted.
3.12 Number of phases of the inverters.
3.13 Number of phases of the DER system. If a three‐phase system is using single‐phase inverters,
indicate the quantity of inverters per phase.
3.14 When multiple DER units are existing or proposed on a single service: all DER systems shall be
shown with proposed and existing marked
3.15 For energy storage systems: the Configuration Mode being applied for shall be clearly indicated
on the one‐line. Refer to Section 10 in the TSM for Configuration Mode details.
3.16 If auxiliary DER equipment power is necessary, the circuit for this auxiliary equipment shall be
shown
Note: Examples of auxiliary DER equipment include axis trackers, heaters, lighting, etc.
3.17 If used, indicate any control system, such as a power control system or plant controller. Give a
functional description of the control system.
Note: A description of the system should be provided to help the reviewer understand the
goals or purpose of the control system. If the control system relies on additional sensors,
such CTs or PTs, these should be indicated and referenced in the description.
May 25, 2021 Page 6 of 11
Metering
3.18 PV Production meter, if applicable, with ownership noted (utility or customer)
3.18.1 For single‐phase installations, the meter shall be specified as 1‐phase, 3‐wire
3.18.2 For three‐phase installations, the meter shall be specified as 3‐phase, 4‐wire
Note: No loads shall be connected on the DER side of an Xcel Energy‐owned production
meter. Energy Storage Systems are permissible, provided they only charge from the DER,
and not the grid, at any time. Indicate PV‐only charging if this is the case.
3.18.3 All Xcel‐owned production meters shall be installed at an Xcel Energy standard voltage3
3.19 The PV production meter will be required to have the PV generation wired to the line side
terminals. Please indicate the LINE SIDE and LOAD SIDE of the PV production meter on the line
diagram.
3.19.1 Customer owned meters shall not be located on the DER side of the Xcel Energy
production meter4
3.20 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
3.21 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
3.21.1 Other AC Disconnects shall not be labeled or identified as a “Utility” AC Disconnect, if
applicable
Note: The “Utility AC Disconnect” must be accessible to Xcel Energy’s personnel 24/7
without escort, hindrance, or delay. Rack‐out/draw‐out breakers5 do not qualify as a
“Utility” AC Disconnect.
3.21.2 For installations that require a Production Meter, the Utility AC Disconnect shall be
located between the DER and production meter
3.21.3 For installations not requiring a Production Meter, the Utility AC Disconnect shall be
located between the DER and main service
3 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
4 Refer to applicable state interconnection tariffs and program rules to determine if production meters are applicable
5 Xcel Energy crews do not operate customer rack‐out/draw‐out breakers and would require customer’s personnel to
operate to create a visible‐open, which causes hindrance and delay that is not acceptable for the “Utility” AC Disconnect.
May 25, 2021 Page 7 of 11
3.21.4 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 100 kW and greater)
3.22 Ground referencing6 equipment shall be installed between the main service meter and
production meter to provide a ground reference for the system
3.22.1 Details of the ground reference equipment required on the one‐line:
3.22.1.1 Type/winding configuration of ground referencing equipment
3.22.1.2 X0 value
3.22.1.3 X0/R0 ratio
3.22.1.4 Neutral current rating
3.22.1.5 Equipment fault withstand rating
3.22.2 Loss of ground referencing equipment shall immediately trip the DER system offline
3.22.2.1 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 Customer Name
Note: The Customer Name on the site diagram should match the Customer Name on the
application
4.2 Installation premise address
Note: The Installation address shall match application address
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
Note: 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)
6 See the “PV and Inverter‐based DER Ground Referencing Requirements and Sample Calculations” document for ground
reference requirements
May 25, 2021 Page 8 of 11
Electrical Component Locations
4.7 Main service entrance, all meter locations, disconnects, transformers, proposed and existing DER
systems
4.7.1 Distance shall be noted between metering and disconnects.
4.7.2 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’
4.8 The Production Meter and AC Disconnect should be located together in a readily accessible
location within 10’ of the main service meter
4.8.1 If the AC disconnect or Production Meter 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
4.9 24/7 unescorted keyless access shall be provided to all Xcel Energy equipment
4.10 If DER facilities are in close proximity to overhead electric service lines, position, distance and
clearance concerns in relation to facilities should be noted. All customer facilities are subject to
NESC clearance requirements in relation to Xcel Energy owned facilities.
4.11 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
7 If either the metering equipment or disconnect, or both, will be located indoors, 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
May 25, 2021 Page 9 of 11
5.0 Revision History
Revision Date Prepared By Approved By Notes
2.0 JCH
Converted to standard
format/layout, added
several sections
3.0 3/3/2021 MMH
Removed sections already
covered in the TSM or in
other parts of the process
and are not required by MN
DIP to be submitted in the
initial application, clarified
requirements for the One
Line Diagram and Site Plan
3.5 5/25/2021 MMH
Added clarification on
Utility AC Disconnect and
alignment with TSM
6.0 Document Dependencies
6.1 Internal Documents
1. Xcel Energy Section 9 Tariff
2. Xcel Energy Section 10 Tariff
3. Xcel Energy Standard for Electric installation and Use
4. Xcel Energy Storage Interconnection Guidelines
6.2 External Documents
1. National Electric Code
2. UL1741
3. IEEE 1547
May 25, 2021 Page 10 of 11
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.
May 25, 2021 Page 11 of 11
May 25, 2021
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
Please update your relevant application documents and resubmit for Xcel Energy review in accordance
with the governing interconnection process timelines.