HomeMy WebLinkAboutLA200735-Approved Sara Fleming ENG CAD814 E 1475 N
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Solar Professional Engineering Consulting 2022.03.10 admin@lucenteng.co
Everlight Solar
PO Box 930550
Verona, WI 53593
RE: Engineering Services
Fleming Residence
20626 Hartford Way, Lakeville, MN
7.12 kW System
Solo Job #1993230
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 :Gable 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 #2 or better Doug-Fir #2 or better
Truss/Rafter Spacing :24'' o.c.24'' o.c.
Roof Slope :30 deg 30 deg
Max Top Chord/Rafter Span :5.41 ft 5.41 ft
Bearing Wall Type : Convl Lt-Frame Constr CLFC
Foundation : Permanent Concrete Permanent Concrete
Stories : Two 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.
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:
Lucent Engineering, P.C.
March 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.
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
Fleming Residence
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.March 25, 2022
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.
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
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
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:
SHEET INDEX:
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: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
RACKING: Quickbolt - 48" O.C.
AC
PV
MSP
M
C
JB
AC
JB
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
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
FRONT OF HOME
20626 Hartford Way
BATT BATTERY(IES)
VISIBLE, LOCKABLE,
LABELED AC DISCONNECT
LOCATED WITHIN 10'
OF UTILITY METER
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
SOLAR ARRAY INVERTERS
BEHIND PANELS
MAIN SERVICE PANEL
LOCATED INSIDE
SUB SUB PANEL
SITE PLAN - PV02
DRAWN BY: SoloCAD
MP1
MP2
ARRAY DETAILS:
MOUNTING PLANE:AZIMUTH:TILT:
MP1 237°30°
MP2 147°30°
CASE #: 04908753
NO CLEARANCE ISSUES AROUND HOME
OR SOLAR ARRAY
HAZELWOOD TR
727' NE
191'-2"
173'-0"
32'-8"
ELECTRIC SERVICE LINES ARE
UNDERGROUND NOT OVERHEAD
AC
PV
MSP
M
C
JB
AC
JB
EQUIPMENT INFORMATION:ROOF INFO:PHOTOVOLTAIC ARRAY STRUCTURAL CRITERIA:
RAIL MANUFACTURER:IronRidge ROOF TYPE:Asphalt Shingle PV MODULE COUNT:25
RAIL PART NUMBER:XR-10 ROOF FRAMING:Manufactured Truss ARRAY AREA:MODULE COUNT * 19.83 ft² = 495.75
ATTACHMENTS Quickbolt RAFTER/TOP CHORD SIZE:2x4 ROOF AREA:2219 ft²
ATTACHMENT QTY:54 RAFTER/TOP CHORD SPACING:24"PERCENT OF ROOF COVERED:22%
SPLICE QTY:8 ATTACHMENT SPACING:48''ARRAY WEIGHT:MODULE COUNT * 45 lbs = 1125 lbs
MIDCLAMP QTY:42 DISTRIBUTED LOAD:ARRAY LBS/ATTACHMENTS = 20.83
ENDCLAMP QTY:16 POINT LOAD: (lbs/ft²)(ARRAY) WEIGHT/AREA = 2.27 lbs/ft²
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
ROOF ATTACHMENTS - PV03
DRAWN BY: SoloCAD
36" FIRE PATHWAY ACCESS
3' TYP
36" FIRE PATHWAY ACCESS
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 12" 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"
MAX
2'-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:25
RAIL PART NUMBER:XR-10 ROOF FRAMING:Manufactured Truss ARRAY AREA:MODULE COUNT * 19.83 ft² = 495.75
ATTACHMENTS Quickbolt RAFTER/TOP CHORD SIZE:2x4 ROOF AREA:2219 ft²
ATTACHMENT QTY:54 RAFTER/TOP CHORD SPACING:24"PERCENT OF ROOF COVERED:22%
SPLICE QTY:8 ATTACHMENT SPACING:48''ARRAY WEIGHT:MODULE COUNT * 45 lbs = 1125 lbs
MIDCLAMP QTY:42 DISTRIBUTED LOAD:ARRAY LBS/ATTACHMENTS = 20.83
ENDCLAMP QTY:16 POINT LOAD: (lbs/ft²)(ARRAY) WEIGHT/AREA = 2.27 lbs/ft²
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
MOUNTING DETAIL - PV04
DRAWN BY: SoloCAD
J-BOX
STRING (1): 15.96 A AC, 14 MODULES
STRING (2): 13.68 A AC, 11 MODULES
N
G
3
AC COMBINER BOX
SOLAR LOADS ONLYUL 1741 COMPLIANT
AC
DC
AC
DC6 INVERTERS
AC
DC
AC
DC7 INVERTERS
J-BOX
(N) 100A
(2) 20A-2P
J-BOX1 2
1 2
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) 150A-2P
(E) 150A MAIN SERVICE PANEL
(E)
(E)UTILITY METER
120/240 VAC
TO UTILITY GRID
4 4
UTILITY PV
PRODUCTION
METER
4
(N) 40A FUSES
60A
UTILITY AC
DISCONNECT
PHOTOVOLTAIC AC
DISCONNECT
LINE SIDE
LOAD SIDE
VISIBLE-OPEN TYPE,
LOCKABLE, READILY
ACCESSIBLE, LABELED,
240V, 2-POLE, FUSED
THE PV PRODUCTION METER
SOCKET MUST HAVE LEVER
BYPASS/BYPASS
1-PH, 3-WIRE,
120/240V, 200A
60A
VISIBLE-OPEN TYPE,
LOCKABLE, READILY
ACCESSIBLE, LABELED,
240V, 2-POLE
NO LOADS OR STAGE
SYSTEM ON DER SIDE OF
PRODUCTION METER
REFERENCE POINT OF APPLICABILITY
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 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 #: 04908753
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 (4)10 AWG THHN/THWN-2, COPPER - (L1, L2)3/4" EMT(1)10 AWG THWN-2 COPPER - (GROUND)
4 (3)6 AWG THWN-2 COPPER - (L1, L2, NEUTRAL)3/4" EMT(1)8 AWG THWN-2 COPPER - (GROUND)
DESIGN SHALL MEET NEC REQUIREMENTS
Equipment Schedule
TYPE:QTY:DESCRIPTION:RATING:
MODULES:(25)Mission Solar MSE345SX5T 345 W
INVERTERS:(13)AP Systems YC600 548 W
AC DISCONNECTS:(1)PV AC Disconnect, 240V, 2-Pole 60 A
AP SYSTEMS YC600 (240V) SPECS
MAXIMUM INPUT VOLTAGE 55V
MAXIMUM INPUT CURRENT 12A X2
NOMINAL OUTPUT VOLTAGE 240V
NOMINAL OUTPUT CURRENT 2.28A
1-PHASE 60HZ UL1741 LISTED
1-PH, 240V RATED SERVICE
ALL PV EQUIPMENT INSTALLED WITHIN 10' OF UTLITY METER
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
8625W
29.64A
STRING #2
13.68A
6
240V
3288W
AP Systems YC600
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 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 (4)10 AWG THHN/THWN-2, COPPER - (L1, L2)3/4" EMT 40A 90°C 32°C 0.96 0.8 30.72A 19.8%(1)10 AWG THWN-2 COPPER - (GROUND)
4 (3)6 AWG THWN-2 COPPER - (L1, L2, NEUTRAL)3/4" EMT 65A 75°C 32°C 0.96 1 62.4A 35.5%(1)8 AWG THWN-2 COPPER - (GROUND)
SYSTEM OCPD CALCULATIONS
INVERTER MODEL(S):AP Systems YC600
# OF INVERTERS:13
MAX OUTPUT CURRENT:2.28A
(# OF INVERTERS) X (MAX OUTPUT CURRENT) X 125% <= OCPD RATING
(13 X 2.28A X 1.25) = 37.05A <= 40A, OK
SUPPLY SIDE INTERCONNECTION
MAIN BUSBAR RATING:150A
MAIN DISCONNECT RATING:150A
PV OCPD RATING:40A
SERVICE RATING >= PV OCPD
150A >= 40A, OK
NUMBER OF CURRENT CARRYING CONDUCTORS PERCENT OF VALUES
4-6 .80
7-9 .70
10-20 .50
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
LABELS - PV07
DRAWN BY: SoloCAD
LABEL 5
AT POINT OF INTERCONNECTION, MARKED AT
AC DISCONNECTING MEANS.
[NEC 690.54, NEC 690.13 (B)]
LABEL 2
PLACED ADJACENT TO THE BACK-FED BREAKER FROM
THE INVERTER IF TIE IN CONSISTS OF LOAD SIDE
CONNECTION TO BUSBAR.
[NEC 705.12(B)(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 THE ELECTRICAL DIAGRAM PAGE.
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
7
5
9
5
(ONLY IF PV
INTERCONNECTION
CONSISTS OF LOAD
SIDE BREAKER)
6
1 1
1
5
(ONLY IF PV
INTERCONNECTION
CONSISTS OF LOAD
SIDE BREAKER)
4
6
3
LABELING DIAGRAM:
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 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 1
FOR PV DISCONNECTING MEANS WHERE THE LINE AND
LOAD TERMINALS MAY BE ENERGIZED IN THE OPEN
POSITION.
[NEC 690.13(B)]
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 2017 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(B)(3)]
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
LABEL 3
PLACED ADJACENT TO THE BACK-FED BREAKER
FROM THE INVERTER IF TIE IN CONSISTS OF LOAD
SIDE CONNECTION TO BUSBAR.
[NEC 705.12(B)(2)(3)(c)]
2
3 4
1
WARNING!
TERMINALS ON THE LINE AND
LOAD SIDES MAY BE ENERGIZED
IN THE OPEN POSITION
!
!
WARNING
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.
WARNING!
DUAL POWER SUPPLY
SOURCES: UTILITY GRID AND PV
SOLAR ELECTRIC SYSTEM
PHOTOVOLTAIC AC DISCONNECT
RATED AC OUTPUT CURRENT:
NOMINAL OPERATING AC VOLTAGE:
ELECTRIC SHOCK HAZARD
INVERTER OUTPUT CONNECTION
DO NOT RELOCATE
THIS OVERCURRENT
DEVICE
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 SYSTEMLABEL 4
EQUIPMENT CONTAINING OVERCURRENT
DEVICES IN CIRCUITS SUPPLYING POWER TO A
BUSBAR OR CONDUCTOR SUPPLIED FROM
MULTIPLE SOURCES SHALL BE MARKED TO
INDICATE THE PRESENCE OF ALL SOURCES
[NEC 705.12(B)(3)]
30
240
AC
PV
MSP
M
C
JB
AC
JB
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 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
20626 Hartford Way, Lakeville MN 55044
FRONT OF HOME
PLACARD - PV08
DRAWN BY: SoloCAD
COMBINER
MAIN DISTRIBUTION
UTILITY DISCONNECTPV ARRAY
SYSTEM UTILIZES MICROINVERTERS LOCATED UNDER EACH MODULE
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
SITE PHOTOS:
SITE PHOTOS - PV09
DRAWN BY: SoloCAD
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
SITE PHOTOS:
FRONT/BACK VIEWS - PV09.1
DRAWN BY: SoloCAD
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
SITE PHOTOS:
SIDE VIEWS - PV09.2
DRAWN BY: SoloCAD
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 2022
SITE PHOTOS:
METER/OPEN MSP - PV09.3
DRAWN BY: SoloCAD
Everlight Solar Construction
PO Box 930550
Verona, WI 53593
License# DCQ-111802116
833.786.4387 ext. 701
CONTRACTOR INFORMATION:
SITE INFORMATION
Sara Fleming
20626 Hartford Way
Lakeville, MN 55044
AC SYSTEM SIZE: 7.124 kW AC
DC SYSTEM SIZE: 8.625 kW DC
Lat, 44.651684
Long, -93.2337153
(25) Mission Solar MSE345SX5T PV MODULES
(13) AP Systems YC600 INVERTER(S)
Xcel Energy MN
DATE:
March 24, 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 #: 04908753
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.