Planning and evelopment Building & Safety ivision Solar PV Standard Plan entral/string Inverter Systems for One and TwoFamily wellings SOPE: Use this plan ONLY for utilityinteractive central/string inverter systems not exceeding a system A inverter output rating of 10kW on the roof of a one or twofamily dwelling or accessory structure. The photovoltaic system must interconnect to the load side of a singlephase A service panel of nominal 120/20Vac with a bus bar rating of 22A or less. This plan is not intended for bipolar systems, hybrid systems or systems that utilize storage batteries, charge controllers, trackers, more than two inverters or more than one combiner (noninverterintegrated) per inverter. Systems must be in compliance with current alifornia Building Standards odes and local amendments of the authority having jurisdiction (AHJ). Other Articles of the alifornia Electrical ode (E) shall apply as specified in 90.3. MANUFATURER S SPEIFIATION SHEETS MUST BE PROVIE for proposed inverter, modules, combiner/junction boxes and racking systems. Installation instructions for bonding and grounding equipment shall be provided, and local AHJs may require additional details. Listed and labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling (E 110.3). Equipment intended for use with PV system shall be identified and listed for the application (E 90.[]). Job Address: Permit #: ontractor/engineer Name: Signature: ate: Phone Number: License # and lass: Total # of Inverters installed: (If more than one inverter, complete and attach the Supplemental alculation Sheets and the Load enter alculations if a new load center is to be used.) Inverter 1 A Output Power Rating: Inverter 2 A Output Power Rating (if applicable): ombined Inverter Output Power Rating: Watts Watts 10,000 Watts Location Ambient Temperatures (heck box next to which lowest expected temperature is used): 1) Lowest expected ambient temperature for the location (T L ) = Between 1 to Lowest expected ambient temperature for the location (T L ) = Between to 10 Average ambient high temperature (T H ) = 7 Note: For a lower T L or a higher T H, use the omprehensive Standard Plan Information: Module Manufacturer: Model: 2) Module V oc (from module nameplate): Volts 3) Module I sc (from module nameplate): Amps ) Module output power under standard test conditions (ST) = Watts (ST) ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
) Module Layout Identify each source circuit (string) for inverter 1 shown on the roof plan with a Tag (e.g. A,B,, ) Number of modules per source circuit for inverter 1 Identify, by tag, which source circuits on the roof are to be paralleled (if none, put N/A) ombiner 1: ombiner 2: Total number of source circuits for inverter 1: ) Are / onverters used? Yes No If No, skip to Step 7. If Yes enter info below. / onverter Model #: / onverter Max Input Voltage: Volts Max Output urrent: Amps Max Output urrent: Volts Max # of / onverters in an Input ircuit: / onverter Max Input Power: Watts 7) Maximum System Voltage Use A1 or A2 for systems without / converters, and B1 or B2 with / onverters. A1. Module V O (STEP 2) = x # in series (STEP ) x 1.12 (If 1 T L, STEP 1) = V A2. Module V O (STEP 2) = x # in series (STEP ) x 1.1 (If T L 10, STEP 1) = V Table 1. Maximum Number of PV Modules in Series Based on Module Rated V O for 00 Vdc Rated Equipment (E 90.7) Max. Rated Module V O (*1.12) Max. Rated Module V O (*1.1) 29.7 31.1 33. 3.71 3.27 1.21..70 3.7 9.2.9 7.3 9.29 29.2 30.9 32.9 3.09 37.9 0.9 3. 7. 2.3..79 7.19 7.72 Max # of Modules for 00 Vdc 1 17 1 1 1 13 12 11 10 9 7 Use for / converters. The value calculated below must be less than / converter max input voltage (STEP ). B1. Module V O (STEP 2) = x # of modules per converter (STEP ) x 1.12 (If 1 T L, STEP 1) = V B2. Module V O (STEP 2) = x # of modules per converter (STEP ) x 1.1 (If T L 10, STEP 1) = V Table 2. Largest Module V O for SingleModule / onverter onfigurations (with 0 V AFI ap) (E 90.7 and 90.11) Max. Rated Module V O (*1.12) Max. Rated Module V O (*1.1) / onverter Max Input (Step #) 30. 33.0 3.7 3. 1.1 3.. 9.1 1.. 7.1 9. 2..2 7.9 70. 29. 32. 3.1 37.7 0. 3.0..2 0.9 3..1. 1..0.7 9.3 3 37 0 3 9 2 1 7 70 73 7 79 ) Maximum System Voltage from / onverters to Inverter Only required if Yes in Step Maximum System Voltage = Volts 9) Maximum Source ircuit urrent Is Module I S below 9. Amps (Step 3)? Yes No (If No, use omprehensive Standard Plan) ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
10) Sizing Source ircuit onductors Source ircuit onductor Size = Min. #10 AWG copper conductor, 90 wet (USE2, PV Wire, XHHW2, THWN2, RHW2) For up to conductors in roofmounted conduit exposed to sunlight at least ½ from the roof covering (E 310) Note: For over conductors in the conduit or mounting height of lower than ½ from the roof, use omprehensive Plan. 11) Are PV source circuits combined prior to the inverter? Yes No If No, use Single Line iagram 1 and proceed to Step 13. If Yes, use Single Line iagram 2 with Single Line iagram and proceed to Step 12. Is source circuit OP required? Yes No Source circuit OP size (if needed): 1 Amps 12) Sizing PV Output ircuit onductors If a combiner box will NOT be used (Step 11), Output ircuit onductor Size = Min. # AWG copper conductor 13) Inverter isconnect oes the inverter have an integrated disconnect? Yes No If Yes, proceed to step 1. If No, the external disconnect to be installed is rated for Amps () and Volts () 1) Inverter Information Manufacturer: Model: Max. ontinuous A Output urrent Rating: Amps Integrated ArcFault ircuit Protection? Yes No (If No is selected, omprehensive Standard Plan) Grounded or Ungrounded System? Grounded Ungrounded A Information: 1) Sizing Inverter Output ircuit onductors and OP Inverter Output OP rating = Amps (Table 3) Inverter Output ircuit onductor Size = AWG (Table 3) Table 3. Minimum Inverter Output OP and ircuit onductor Size Inverter ontinuous Output urrent Rating (Amps) (Step 1) 12 1 20 2 2 32 3 0 Minimum OP Size (Amps) 1 20 2 30 3 0 0 0 Minimum onductor Size (AWG, 7, opper) 1 12 10 10 ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
1) Point of onnection to Utility Only load side connections are permitted with this plan. Otherwise, use omprehensive Standard Plan. Is the PV OP positioned at the opposite end from input feeder location or main OP location? Yes No If Yes, circle the Max ombined PV System OP(s) at 120% value as determined from Step 1 (or Step S20), bus bar Rating, and Main OP as shown in Table. If No, circle the Max ombined PV System OP(s) at 100% value as determined from Step 1 (or Step S20), bus bar Rating, and Main OP as shown in Table. Per 70.12()(2): [Inverter output OP size [Step #1 or S20] Main OP Size] [bus size x (100% or 120%)] Table. Maximum ombined Supply OPs Based on Bus Bar Rating (Amps) per E 70.12()(2) Max ombined PV System OP(s) at 120% of Bus Bar Rating Max ombined PV System OP(s) at 100% Bus Bar Rating Bus Bar Rating 100 12 12 200 200 200 22 22 22 Main OP 100 100 12 10 17 200 17 200 22 *This value has been lowered to 0 A from the calculated value to reflect 10 kw A size maximum. 20 0 2 0* 0* 0 0* 0* 0 2 0 0 2 0 0 2 0 Reduction of the main breaker is not permitted with this plan. Otherwise, use omprehensive Standard Plan. 17 & 1 & 19) Labels and Grounding and Bonding This content is covered by the labels on the next page and the Single Line iagram(s). For background information, refer to the omprehensive Standard Plan. ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
Solar PV Standard Plan Simplified entral/string Inverter Systems for One and TwoFamily wellings Markings E Articles 90 and 70 and R Section R331 require the following labels or markings be installed at these components of the photovoltaic system: WARNING OUTPUT ONNETION; O NOT RELOATE THIS OVERURRENT EVIE E 70.12()(7) [Not required if panelboard is rated not less than sum of ampere ratings of all overcurrent devices supplying it] WARNING ELETRI SHOK HAZAR. THE ONUTORS OF THIS PHOTOVOLTAI SYSTEM ARE UNGROUNE AN MAY BE ENERGIZE E 90.3(F) [Only required for ungrounded systems] WARNING: PHOTOVOLTAI POWER SOURE R R331.2 and F 0.11.1 [Marked on junction/combiner boxes and conduit every 10 ] ode Abbreviations: alifornia Electrical ode (E) alifornia Residential ode (R) alifornia Fire ode (F) J/Box M A WARNING UAL POWER SOURES SEON SOURE IS PHOTOVOLTAI SYSTEM RATE A OUTPUT URRENT AMPS A NORMAL OPERATING VOLE VOLTS E 90. & E 70.12()() PV SYSTEM A ISONNET RATE A OUTPUT URRENT AMPS A NORMAL OPERATING VOLE VOLTS E 90. WARNING ELETRI SHOK HAZAR IF A GROUN FAULT IS INIATE, NORMALLY GROUNE ONUTORS MAY BE UNGROUNE AN ENERGIZE E 90.() [Normally already present on listed inverters] WARNING ELETRI SHOK HAZAR O NOT TOUH TERMINALS TERMINALS ON BOTH LINE AN LOA SIES MAY BE ENERGIZE IN THE OPEN POSITION E 90.17 PV SYSTEM ISONNET RATE MAX POWERPOINT URRENT A RATE MAX POWERPOINT VOLE V SHORT IRUIT URRENT A MAXIMUM SYSTEM VOLE V E 90.3 Informational note: ANSI Z3. provides guidelines for the design of safety signs and labels for application to products. A phenolic plaque with contrasting colors between the text and background would meet the intent of the code for permanency. No type size is specified, but 20 point (3/ ) should be considered the minimum. E 70.12 requires a permanent plaque or directory denoting all electric power sources on or in the premises. ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily wellings 1 2 3 7 9 10 ESRIPTION SOLAR PV MOULE / STRING / ONVERTERS INSTALLE? YES / NO (IF YES, STEPS & REQUIRE) SOURE IRUIT JUNTION BOX INSTALLE?: YES / NO SEPARATE ISONNET INSTALLE?: YES / NO INTERNAL ISONNET: YES / NO ENTRAL LOA ENTER INSTALLE?: YES / NO PV PROUTION METER INSTALLE?: YES / NO *SEPARATE A ISONNET INSTALLE?: YES / NO ONNET TO #2 (USE LINE IAGRAM 2) * onsult with your local AHJ and /or Utility SINGLELINE IAGRAM #1 NO STRINGS OMBINE PRIOR TO HEK A BOX FOR WHETHER SYSTEM IS GROUNE OR UNGROUNE: GROUNE (INLUE GE) UNGROUNE FOR UNGROUNE SYSTEMS: OP MUST ISONNET BOTH ONUTORS OF EAH SOURE IRUIT UNGROUNE ONUTORS MUST BE IENTIFIE PER 210.(). WHITEFINISHE ONUTORS ARE NOT PERMITTE. 1 2 3 7 A B 1 M 9 MAIN SERVIE PANEL G PV OP M MAIN OP B 2 G A B 10 IF / ONVERTERS ARE USE, HEK THE BOX BELOW THE ORRESPONING ONFIGURATION ONUTOR/ONUIT SHEULE ESRIPTION AN ONUTOR TYPE ONUTOR NUMBER OF SIZE ONUTORS A USE2 OR PVWIRE B ONUIT/ABLE TYPE ONUIT SIZE ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONUIT OR ABLE AS PERMITTE BY OE / ONVERTERS PARALLEL / ONVERTERS ON ONE SOURE IRUIT (FIXE UNIT VOLE / ONVERTERS) / ONVERTERS / ONVERTERS ARE ALL RUN IN SERIES (FIXE SOURE IRUIT VOLE / ONVERTERS) ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily wellings 1 2 3 7 9 10 11 ESRIPTION SOLAR PV MOULE / STRING / ONVERTERS INSTALLE? YES / NO (IF YES, STEPS & REQUIRE) SOURE IRUIT JUNTION BOX INSTALLE?: YES / NO OMBINER BOX (STEPS 11 & 12 REQUIRE) SEPARATE ISONNET INSTALLE?: YES / NO INTERNAL ISONNET: YES / NO ENTRAL LOA ENTER INSTALLE?: YES / NO PV PROUTION METER INSTALLE?: YES / NO *SEPARATE A ISONNET INSTALLE?: YES / NO ONNET TO #2 (USE LINE IAGRAM ) * onsult with your local AHJ and /or Utility SINGLELINE IAGRAM #2 OMBINING STRINGS PRIOR TO HEK A BOX FOR WHETHER SYSTEM IS GROUNE OR UNGROUNE: GROUNE (INLUE GE) UNGROUNE FOR UNGROUNE SYSTEMS: OP MUST ISONNET BOTH ONUTORS OF EAH SOURE IRUIT UNGROUNE ONUTORS MUST BE IENTIFIE PER 210.(). WHITEFINISHE ONUTORS ARE NOT PERMITTE. MAIN SERVIE PANEL M 1 2 3 7 A B 1 9 M 10 G PV OP MAIN OP A1 B1 B 2 G 11 E A2 OMBINER ONUTOR/ONUIT SHEULE ESRIPTION AN ONUTOR NUMBER OF ONUIT/ABLE ONUTOR TYPE SIZE ONUTORS TYPE A1 USE2 OR PVWIRE B1 E B2 ONUIT SIZE NONOMBINE STRINGS ONUTOR/ONUIT SHEULE (IF APPLIABLE) ESRIPTION AN ONUTOR NUMBER OF ONUIT/ABLE ONUIT SIZE ONUTOR TYPE SIZE ONUTORS TYPE A2 USE2 OR PVWIRE B2 ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONUIT OR ABLE AS PERMITTE BY OE / ONVERTERS IF / ONVERTERS ARE USE, THEY ARE RUN IN SERIES (FIXE SOURE IRUIT VOLE / ONVERTERS) ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
Supplemental alculation Sheets for Inverter #2 (Only include if second inverter is used) Information: Module Manufacturer: Model: S2) Module V oc (from module nameplate): Volts S3) Module I sc (from module nameplate): Amps S) Module output power under standard test conditions (ST) = Watts (ST) S) Module Layout Identify each source circuit (string) for inverter 1 shown on the roof plan with a Tag (e.g. A,B,, ) Number of modules per source circuit for inverter 1 Identify, by tag, which source circuits on the roof are to be paralleled (if none, put N/A) ombiner 1: ombiner 2: Total number of source circuits for inverter 1: S) Are / onverters used? Yes No If No, skip to Step S7. If Yes, enter info below. / onverter Model #: / onverter Max Input Voltage: Volts Max Output urrent: Amps Max Output urrent: Volts Max # of / onverters in an Input ircuit: / onverter Max Input Power: Watts ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
S7) Maximum System Voltage Use A1 or A2 for systems without / converters, and B1 or B2 with / onverters. A1. Module V O (STEP S2) = x # in series (STEP S) x 1.12 (If 1 T L, STEP S1) = V A2. Module V O (STEP S2) = x # in series (STEP S) x 1.1 (If T L 10, STEP S1) = V Table 1. Maximum Number of PV Modules in Series Based on Module Rated V O for 00 Vdc Rated Equipment (E 90.7) Max. Rated Module V O (*1.12) Max. Rated Module V O (*1.1) 29.7 31.1 33. 3.71 3.27 1.21..70 3.7 9.2.9 7.3 9.29 29.2 30.9 32.9 3.09 37.9 0.9 3. 7. 2.3..79 7.19 7.72 Max # of Modules for 00 Vdc 1 17 1 1 1 13 12 11 10 9 7 Use for / converters. The value calculated below must be less than / converter max input voltage (STEP S). B1. Module V O (STEP S2) = x # of modules per converter (STEP S) x 1.12 (If 1 T L, STEP S1) = V B2. Module V O (STEP S2) = x # of modules per converter (STEP S) x 1.1 (If T L 10, STEP S1) = V Table 2. Largest Module V O for SingleModule / onverter onfigurations (with 0 V AFI ap) (E 90.7 and 90.11) Max. Rated Module V O (*1.12) Max. Rated Module V O (*1.1) / onverter Max Input (Step ) 30. 33.0 3.7 3. 1.1 3.. 9.1 1.. 7.1 9. 2..2 7.9 70. 29. 32. 3.1 37.7 0. 3.0..2 0.9 3..1. 1..0.7 9.3 3 37 0 3 9 2 1 7 70 73 7 79 S) Maximum System Voltage from / onverters to Inverter Only required if Yes in Step S Maximum System Voltage = Volts S9) Maximum Source ircuit urrent Is Module I S below 9. Amps (Step S3)? Yes No (If No, use omprehensive Standard Plan) S10) Sizing Source ircuit onductors Source ircuit onductor Size = Min. #10 AWG copper conductor, 90 wet (USE2, PV Wire, XHHW2, THWN2, RHW2) For up to conductors in roofmounted conduit exposed to sunlight at least ½ from the roof covering (E 310) Note: For over conductors in the conduit or mounting height of lower than ½ from the roof, use omprehensive Plan. S11) Are PV source circuits combined prior to the inverter? Yes No If No, use Single Line iagram 1 and proceed to Step S13. If Yes, use Single Line iagram 2 with Single Line iagram and proceed to Step S12. Is source circuit OP required? Yes No Source circuit OP size (if needed): 1 Amps S12) Sizing PV Output ircuit onductors If a combiner box will NOT be used (Step S11), Output ircuit onductor Size = Min. # AWG copper conductor S13) Inverter isconnect oes the inverter have an integrated disconnect? Yes No If Yes, proceed to Step S1. If No, the external disconnect to be installed is rated for Amps () and Volts () ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
S1) Inverter Information Manufacturer: Model: Max. ontinuous A Output urrent Rating: Amps Integrated ArcFault ircuit Protection? Yes No (If No is selected, omprehensive Standard Plan) Grounded or Ungrounded System? Grounded Ungrounded A Information: S1) Sizing Inverter Output ircuit onductors and OP Inverter Output OP rating = Amps (Table 3) Inverter Output ircuit onductor Size = AWG (Table 3) Table 3. Minimum Inverter Output OP and ircuit onductor Size Inverter ontinuous Output urrent Rating (Amps) (Step 1) 12 1 20 2 2 32 3 0 Minimum OP Size (Amps) 1 20 2 30 3 0 0 0 Minimum onductor Size (AWG, 7, opper) 1 12 10 10 Load enter alculations (Omit if a load center will not be installed for PV OPs) S20) Load enter Output: alculate the sum of the maximum A outputs from each inverter. Inverter #1 Max ontinuous A Output urrent Rating [STEP S1] 1.2 = Amps Inverter #2 Max ontinuous A Output urrent Rating [STEP S1] 1.2 = Amps Total inverter currents connected to load center (sum of above) = Amps onductor Size: AWG Overcurrent Protection evice: Amps Load center bus bar rating: Amps The sum of the ampere ratings of overcurrent devices in circuits supplying power to a bus bar or conductor shall not exceed 120 percent of the rating of the bus bar or conductor. ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily wellings 1 2 3 7 ESRIPTION SOLAR PV MOULE / STRING / ONVERTERS INSTALLE? YES / NO (IF YES, STEPS & REQUIRE) SOURE IRUIT JUNTION BOX INSTALLE?: YES / NO SEPARATE ISONNET INSTALLE?: YES / NO INTERNAL ISONNET: YES / NO ENTRAL *SEPARATE A ISONNET INSTALLE?: YES / NO TO LOA ENTER ON LINE IAGRAM 1 * onsult with your local AHJ and /or Utility SINGLELINE IAGRAM #3 AITIONAL FOR IAGRAM #1 # 2 HEK A BOX FOR WHETHER SYSTEM IS GROUNE OR UNGROUNE: GROUNE (INLUE GE) UNGROUNE FOR UNGROUNE SYSTEMS: OP MUST ISONNET BOTH ONUTORS OF EAH SOURE IRUIT UNGROUNE ONUTORS MUST BE IENTIFIE PER 210.(). WHITEFINISHE ONUTORS ARE NOT PERMITTE. 1 2 3 7 A A B IF / ONVERTERS ARE USE, HEK THE BOX BELOW THE ORRESPONING ONFIGURATION / ONVERTERS / ONVERTERS ONUTOR/ONUIT SHEULE ESRIPTION AN ONUTOR TYPE ONUTOR NUMBER OF SIZE ONUTORS A USE2 OR PVWIRE B ONUIT/ABLE TYPE ONUIT SIZE ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONUIT OR ABLE AS PERMITTE BY OE PARALLEL / ONVERTERS ON ONE SOURE IRUIT (FIXE UNIT VOLE / ONVERTERS) / ONVERTERS ARE ALL RUN IN SERIES (FIXE SOURE IRUIT VOLE / ONVERTERS) ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily wellings 1 2 3 7 9 ESRIPTION SOLAR PV MOULE / STRING / ONVERTERS INSTALLE? YES / NO (IF YES, STEPS & REQUIRE) SOURE IRUIT JUNTION BOX INSTALLE?: YES / NO OMBINER BOX (STEPS 11 & 12 REQUIRE) SEPARATE ISONNET INSTALLE?: YES / NO INTERNAL ISONNET: YES / NO ENTRAL *SEPARATE A ISONNET INSTALLE?: YES / NO TO LOA ENTER ON LINE IAGRAM 3 * onsult with your local AHJ and /or Utility SINGLELINE IAGRAM # AITIONAL FOR IAGRAM #2 # 2 HEK A BOX FOR WHETHER SYSTEM IS GROUNE OR UNGROUNE: GROUNE (INLUE GE) UNGROUNE FOR UNGROUNE SYSTEMS: OP MUST ISONNET BOTH ONUTORS OF EAH SOURE IRUIT UNGROUNE ONUTORS MUST BE IENTIFIE PER 210.(). WHITEFINISHE ONUTORS ARE NOT PERMITTE. 1 2 3 7 A 9 A1 B1 A2 B2 / ONVERTERS OMBINER ONUTOR/ONUIT SHEULE ESRIPTION AN ONUTOR NUMBER OF ONUIT/ABLE ONUTOR TYPE SIZE ONUTORS TYPE A1 USE2 OR PVWIRE B1 ONUIT SIZE NONOMBINE STRINGS ONUTOR/ONUIT SHEULE (IF APPLIABLE) ESRIPTION AN ONUTOR NUMBER OF ONUIT/ABLE ONUIT SIZE ONUTOR TYPE SIZE ONUTORS TYPE A2 USE2 OR PVWIRE B2 ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONUIT OR ABLE AS PERMITTE BY OE IF / ONVERTERS ARE USE, THEY ARE RUN IN SERIES (FIXE SOURE IRUIT VOLE / ONVERTERS) ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1
SOLAR PV STANAR PLAN Roof Layout iagram for One and TwoFamily wellings Items required: roof layout of all panels, modules, clear access pathways and approximate locations of electrical disconnecting means and roof access points. ity of Berkeley, Building & Safety ivision (10) 9170 Issue ate: 9/30/1