Building and Safety Division Policy and Procedure No. A09301 Effective Date January 1, 2017 Expedited Permitting Process Residential RoofTop Mounted Solar Installations Form Solar PV Standard Plan Simplified entral/string Inverter Systems 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 D 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 690.3. MANUFATURER S SPEIFIATION SHEETS MUST BE PROVIDED 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 690.[D]). Job Address: Permit #: ontractor/engineer Name: Signature: Date: 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 6 to 10 Average ambient high temperature (T H ) < 7 Note: For a lower T L or a higher T H, this plan is not applicable. D Information: Module Manufacturer: Model: 2) Module V oc (from module nameplate): Volts 3) Module I sc (from module nameplate): Amps Is Module I sc below 9.6 Amps? Yes No (If No, this plan is not applicable.) ) Module D output power under standard test conditions (ST) = Watts (ST)
) D 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: 6) Are D/D onverters used? Yes No If No, skip to Step 7. If Yes enter info below. D/D onverter Model #: D/D onverter Max D Input Voltage: Volts Max D Output urrent: Amps Max D Output urrent: Volts Max # of D/D onverters in an Input ircuit: D/D onverter Max D Input Power: Watts 7) Maximum System D Voltage Use A1 or A2 for systems without D/D converters, and B1 or B2 with D/D onverters. A1. Module V O (STEP 2) = x # of modules in series (STEP ) x 1.12 (If 1 T L, STEP 1) = V A2. Module V O (STEP 2) = x # of modules in series (STEP ) x 1.1 (If 6 T L 10, STEP 1) = V Table 1. Maximum Number of PV Modules in Series Based on Module Rated V O for 600 Vdc Rated Equipment (E 690.7) Max. Rated Module V O (*1.12) (Volts) Max. Rated Module V O (*1.1) (Volts) 29.76 31.1 33.8 3.71 38.27 1.21.6 8.70 3.7 9.2 66.96 76.3 89.29 29.2 30.96 32.89 3.09 37.9 0.9 3.86 7.8 2.63 8.8 6.79 7.19 87.72 Max # of Modules for 600 Vdc 18 17 16 1 1 13 12 11 10 9 8 7 6 Use for D/D converters. The value calculated below must be less than D/D converter max D input voltage (STEP 6). B1. Module V O (STEP 2) = x # of modules per converter (STEP 6) x 1.12 (If 1 T L, STEP 1) = V B2. Module V O (STEP 2) = x # of modules per converter (STEP 6) x 1.1 (If 6 T L 10, STEP 1) = V Table 2. Largest Module V O for SingleModule D/D onverter onfigurations (with 80 V AFI ap) (E 690.7 and 690.11) Max. Rated Module V O (*1.12) (Volts) Max. Rated Module V O (*1.1) (Volts) D/D onverter Max D Input (Step #6) (Volts) 30. 33.0 3.7 38. 1.1 3.8 6. 9.1 1.8. 7.1 9.8 62. 6.2 67.9 70. 29.8 32. 3.1 37.7 0. 3.0.6 8.2 0.9 3. 6.1 8.8 61. 6.0 66.7 69.3 3 37 0 3 6 9 2 8 61 6 67 70 73 76 79 8) Maximum System D Voltage from D/D onverters to Inverter Only required if Yes in Step 6 Maximum System D Voltage = Volts
9) Sizing Source ircuit onductors Source ircuit onductor Size = Min. #10 AWG copper conductor, 90 wet (USE2, PV Wire, XHHW2, THWN2, RHW2) For up to 8 conductors in roofmounted conduit exposed to sunlight at least ½ from the roof covering (E 310) Note: For over 8 conductors in the conduit or mounting height of lower than ½ from the roof, use omprehensive Plan. 10) Are PV source circuits combined prior to the inverter? Yes No If No, use Single Line Diagram 1 and proceed to Step 12. If Yes, use Single Line Diagram 2 with Single Line Diagram and proceed to Step 11. Is source circuit OPD required? Yes No Source circuit OPD size (if needed): 1 Amps Are the source circuits combined on the roof? Yes No If Yes, the D output of the combiner shall have a load break disconnecting means located in the combiner or within 1.8m (6ft) of the combiner (E 690.1(c)). 11) Sizing PV Output ircuit onductors Sizing strings are combined (answered Yes in step 10). Output ircuit onductor Size = Min. #6 AWG copper conductor 12) Inverter D Disconnect Does the inverter have an integrated D disconnect? Yes No If Yes, proceed to step 13. If No, the external D disconnect to be installed is rated for Amps (D) and Volts (D) 13) Inverter Information Manufacturer: Model: Max. ontinuous A Output urrent Rating: Amps Integrated D ArcFault ircuit Protection? Yes No (If No is selected, this plan is not applicable) Grounded or Ungrounded System? Grounded Ungrounded A Information: 1) Sizing Inverter Output ircuit onductors and OPD Inverter Output OPD rating = Amps (Table 3) Inverter Output ircuit onductor Size = AWG (Table 3) Table 3. Minimum Inverter Output OPD and ircuit onductor Size Inverter ontinuous Output urrent Rating (Amps) (Step 1) 12 16 20 2 28 32 36 0 8 Minimum OPD Size (Amps) 1 20 2 30 3 0 0 60 Minimum onductor Size (AWG, 7, opper) 1 12 10 10 8 8 6 6 6
1) Point of onnection to Utility Note: Only load side connections are permitted with this plan. Is the PV OPD positioned at the opposite end from input feeder location or main OPD location? Yes No If Yes, use Table row 3 circle the Max combined PV System OPD(s) at 120% based on the busbar rating and main OPD values. If No, use Table, row 3 and circle the Max ombined PV System OPD(s) at 120% based on the busbar rating and the main OPD values. Per 70.12(D)(2)(3): [Inverter output OPD size [Step #1 or S18] Main OPD Size] [bus size x (120%)] Table. Maximum ombined Supply OPDs Based on Bus Bar Rating (Amps) per E 70.12(D)(2)(3)(b) Max ombined PV System OPD(s) at 120% of Bus Bar Rating Max ombined PV System OPD(s) at 100% Bus Bar Rating Bus Bar Rating 100 12 12 200 200 200 22 22 22 Main OPD 100 100 12 10 17 200 17 200 22 *This value has been lowered to 60 A from the calculated value to reflect 10 kw A size maximum. Reduction of the main breaker is not permitted with this plan. Lineside tap is not permitted with this plan. 20 0 2 60* 60* 0 60* 60* 0 2 0 0 2 0 0 2 0
16) Rapid Shutdown The rapid shutdown initiation device shall be labeled according to E 690.6(), and its location shall be shown on the site plan drawing. The rapid shutdown initiation device may be the inverter output or input circuits disconnecting means, the service main disconnect, or a separate device as approved by the AHJ. The disconnecting means shall be identified for the purpose, suitable for their environment, and listed as a disconnecting means. A single rapid shutdown initiation device shall operate all disconnecting means necessary to control conductors in compliance with E 690.12. Note: heck with the AHJ regarding approval where field verification of reduction of voltage within the time required by E 690.12 is performed. Rapid shutdown shall be provided as required by E 690.12 with one of the following methods (Select one): The inverter(s) is within 10 feet of the array, and the location of the inverter is such that uncontrolled PV system conductors are no greater than feet of length within the building. A remotelycontrolled A disconnecting means is required immediately adjacent to or as close as practicable to the inverters, and located within 10 feet of the array. The inverter(s) is within 10 feet of the array, and the location of the inverter is such that uncontrolled PV system conductors are no greater than feet of length within the building. Reduction of the voltage for the inverter output within the time required by E 690.12 shall be verified in the field, or the inverter output is listed to UL 171 with rapid shutdown capability. Remotelycontrolled D disconnecting means are located within 10 feet of the PV array and D input of the inverter(s), and the locations of the disconnecting means are such that uncontrolled PV system conductors are no greater than feet of length within the building. Reduction of the voltage for the inverter output within the time required by E 690.12 shall be verified in the field, or the inverter output is listed to UL 171 with rapid shutdown capability. Remotelycontrolled D disconnecting means is located within 10 feet of the array at the D input of inverter(s) connected to a module level DD converter circuit where the DD converter circuit meets the requirements for controlled conductors when disconnected from the inverter. Reduction of the voltage for the DD converter output and the inverter output within the time required by E 690.12 shall be verified in the field, or the DD converter output and the inverter output are listed to UL 171 with rapid shutdown capability. A UL 171listed and identified inverter(s) with input and output rapid shutdown capability supplying module level DD converter circuit where the DD converter circuit meets the requirements for controlled conductors when disconnected from the inverter. A UL 171listed rapid shutdown system: Manufacturer: Testing Agency Name: System Model Number: System omponents:
17) Grounding and Bonding of Modules and Racking System (select one): Racking system listed to UL 2703 using modules identified in the listing. Other method subject to AHJ approval
Solar PV Standard Plan Simplified entral/string Inverter Systems for One and TwoFamily Dwellings
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily Dwellings 1 2 3 6 7 8 9 10 DESRIPTION SOLAR PV MODULE / STRING D/D ONVERTERS INSTALLED? YES / NO (IF YES, STEPS 6 & 8 REQUIRED) SOURE IRUIT JUNTION BOX INSTALLED?: YES / NO SEPARATE D DISONNET INSTALLED?: YES / NO INTERNAL INVERTER D DISONNET: YES / NO ENTRAL INVERTER LOAD ENTER INSTALLED?: YES / NO PV PRODUTION METER INSTALLED?: YES / NO *SEPARATE A DISONNET INSTALLED?: YES / NO ONNET TO INVERTER #2 (USE LINE DIAGRAM 2) * onsult with your local AHJ and /or Utility SINGLELINE DIAGRAM #1 NO STRINGS OMBINED PRIOR TO INVERTER HEK A BOX FOR WHETHER SYSTEM IS GROUNDED OR UNGROUNDED: GROUNDED (INLUDE GE) UNGROUNDED FOR UNGROUNDED SYSTEMS: D OPD MUST DISONNET BOTH ONDUTORS OF EAH SOURE IRUIT UNGROUNDED ONDUTORS MUST BE IDENTIFIED PER 210.(). WHITEFINISHED ONDUTORS ARE NOT PERMITTED. 1 2 3 6 7 A D B 1 8 M 9 MAIN SERVIE PANEL G PV OPD M MAIN OPD B 2 G A B 10 D IF D/D ONVERTERS ARE USED, HEK THE BOX BELOW THE ORRESPONDING ONFIGURATION ONDUTOR/ONDUIT SHEDULE DESRIPTION AND ONDUTOR TYPE ONDUTOR NUMBER OF SIZE ONDUTORS A USE2 OR PVWIRE EG/GE: B EG/GE: EG/GE: D EG/GE: ONDUIT/ABLE TYPE ONDUIT SIZE ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONDUIT OR ABLE AS PERMITTED BY ODE D/D ONVERTERS INVERTER PARALLEL D/D ONVERTERS ON ONE SOURE IRUIT (FIXED UNIT VOLE D/D ONVERTERS) D/D ONVERTERS INVERTER D/D ONVERTERS ARE ALL RUN IN SERIES (FIXED SOURE IRUIT VOLE D/D ONVERTERS)
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily Dwellings 1 2 3 6 7 8 9 10 11 DESRIPTION SOLAR PV MODULE / STRING D/D ONVERTERS INSTALLED? YES / NO (IF YES, STEPS 6 & 8 REQUIRED) SOURE IRUIT JUNTION BOX INSTALLED?: YES / NO OMBINER BOX (STEPS 11 & 12 REQUIRED) SEPARATE D DISONNET INSTALLED?: YES / NO INTERNAL INVERTER D DISONNET: YES / NO ENTRAL INVERTER LOAD ENTER INSTALLED?: YES / NO PV PRODUTION METER INSTALLED?: YES / NO *SEPARATE A DISONNET INSTALLED?: YES / NO ONNET TO INVERTER #2 (USE LINE DIAGRAM ) * onsult with your local AHJ and /or Utility SINGLELINE DIAGRAM #2 OMBINING STRINGS PRIOR TO INVERTER HEK A BOX FOR WHETHER SYSTEM IS GROUNDED OR UNGROUNDED: GROUNDED (INLUDE GE) UNGROUNDED FOR UNGROUNDED SYSTEMS: D OPD MUST DISONNET BOTH ONDUTORS OF EAH SOURE IRUIT UNGROUNDED ONDUTORS MUST BE IDENTIFIED PER 210.(). WHITEFINISHED ONDUTORS ARE NOT PERMITTED. MAIN SERVIE PANEL M 1 2 3 6 7 8 A D B 1 9 M 10 G PV OPD MAIN OPD A1 B1 B 2 G D 11 E INVERTER A2 OMBINER ONDUTOR/ONDUIT SHEDULE DESRIPTION AND ONDUTOR NUMBER OF ONDUIT/ABLE ONDUTOR TYPE SIZE ONDUTORS TYPE A1 USE2 OR PVWIRE EG/GE: B1 EG/GE: EG/GE: D EG/GE: E EG/GE: B2 ONDUIT SIZE NONOMBINED STRINGS ONDUTOR/ONDUIT SHEDULE (IF APPLIABLE) DESRIPTION AND ONDUTOR NUMBER OF ONDUIT/ABLE ONDUIT SIZE ONDUTOR TYPE SIZE ONDUTORS TYPE A2 USE2 OR PVWIRE EG/GE: B2 EG/GE: ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONDUIT OR ABLE AS PERMITTED BY ODE D/D ONVERTERS IF D/D ONVERTERS ARE USED, THEY ARE RUN IN SERIES (FIXED SOURE IRUIT VOLE D/D ONVERTERS)
D Information: Supplemental alculation Sheets for Inverter #2 (Only include if second inverter is used) Module Manufacturer: Model: S2) Module V oc (from module nameplate): Volts S3) Module I sc (from module nameplate): Amps Is Module I sc below 9.6 Amps? Yes No S) Module D output power under standard test conditions (ST) = Watts (ST) S) D 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: S6) Are D/D onverters used? Yes No If No, skip to Step S7. If Yes, enter info below. D/D onverter Model #: Max D D/D onverter Max D Input Voltage: Volts Max D Output urrent: Amps Max D Output urrent: Volts Max # of D/D onverters in an Input ircuit: D/D onverter Max D Input Power: Watts
S7) Maximum System D Voltage Use systems without D/D converters A. Module V O (STEP S2) = x # of modules in series (STEP S) x f (Step 1) = V Use for systems with D/D converters. The value calculated below must be less than D/D converter max D input voltage (STEP S6). B. Module V O (STEP S2) = x # of modules per converter (STEP S6) x f (Step 1) = V Table 2. Largest Module V O for SingleModule D/D onverter onfigurations (with 80 V AFI ap) (E 690.7 and 690.11) Max. Rated Module V O (*1.12) (Volts) Max. Rated Module V O (*1.1) (Volts) D/D onverter Max D Input (Step 6) (Volts) 30. 33.0 3.7 38. 1.1 3.8 6. 9.1 1.8. 7.1 9.8 62. 6.2 67.9 70. 29.8 32. 3.1 37.7 0. 3.0.6 8.2 0.9 3. 6.1 8.8 61. 6.0 66.7 69.3 3 37 0 3 6 9 2 8 61 6 67 70 73 76 79 S8) Maximum System D Voltage from D/D onverters to Inverter Only required if Yes in Step S6 Maximum System D Voltage = Volts S9) Sizing Source ircuit onductors Source ircuit onductor Size = Min. #10 AWG copper conductor, 90 wet (USE2, PV Wire, XHHW2, THWN2, RHW2) For up to 8 conductors in roofmounted conduit exposed to sunlight at least ½ from the roof covering (E 310) Note: For over 8 conductors in the conduit or mounting height of lower than ½ from the roof, this plan is not applicable. S10) Are PV source circuits combined prior to the inverter? Yes No If No, use Single Line Diagram 1 with Single Line Diagram 3 and proceed to Step S12. If Yes, use Single Line Diagram 2 with Single Line Diagram and proceed to Step S11. Is source circuit OPD required? Yes No Source circuit OPD size (if needed): 1 Amps Are the source circuits combined on the roof? Yes No If Yes, the D output of the combiner shall have a load breaker disconnecting means located in the combiner or within 1.8m (6ft) of the combiner. S11) Sizing PV Output ircuit onductors If strings are combined (answer Yes in Step S10), Output ircuit onductor Size = Min. #6 AWG copper conductor S12) Inverter Disconnect Does the inverter have an integrated D disconnect? Yes No If Yes, proceed to Step S13. If No, the external D disconnect to be installed is rated for Amps (D) and Volts (D)
S13) Inverter Information Manufacturer: Model: Max. ontinuous A Output urrent Rating: Amps Integrated D ArcFault ircuit Protection? Yes No (If No is selected, this plan is not applicable) Grounded or Ungrounded System? Grounded Ungrounded A Information: S1) Sizing Inverter Output ircuit onductors and OPD Inverter Output OPD rating = Amps (Table 3) Inverter Output ircuit onductor Size = AWG (Table 3) Table 3. Minimum Inverter Output OPD and ircuit onductor Size Inverter ontinuous Output urrent Rating (Amps) (Step 1) 12 16 20 2 28 32 36 0 8 Minimum OPD Size (Amps) 1 20 2 30 3 0 0 60 Minimum onductor Size (AWG, 7, opper) 1 12 10 10 8 8 6 6 6 Load enter alculations (Omit if a load center will not be installed for PV OPDs) S18) Load enter Output: alculate the sum of the maximum A outputs from each inverter. Inverter #1 Max ontinuous A Output urrent Rating [STEP S13] 1.2 = Amps Inverter #2 Max ontinuous A Output urrent Rating [STEP S13] 1.2 = Amps Total inverter currents connected to load center (sum of above) = Amps onductor Size: AWG Overcurrent Protection Device: Amps Load center bus bar rating: Amps an the load center accept more than two breakers? Yes No If Yes, the sum of 12% of the inverter output circuit currents and the rating of the overcurrent device protecting the busbar shall not exceed 120% of the ampacity of the busbar. If No, the sum of the ampere rating of the two PV overcurrent devices shall not exceed the rating of the busbar.
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily Dwellings 1 2 3 6 7 8 DESRIPTION SOLAR PV MODULE / STRING D/D ONVERTERS INSTALLED? YES / NO (IF YES, STEPS 6 & 8 REQUIRED) SOURE IRUIT JUNTION BOX INSTALLED?: YES / NO SEPARATE D DISONNET INSTALLED?: YES / NO INTERNAL INVERTER D DISONNET: YES / NO ENTRAL INVERTER *SEPARATE A DISONNET INSTALLED?: YES / NO TO LOAD ENTER ON LINE DIAGRAM 1 * onsult with your local AHJ and /or Utility SINGLELINE DIAGRAM #3 ADDITIONAL INVERTER FOR DIAGRAM #1 INVERTER # 2 HEK A BOX FOR WHETHER SYSTEM IS GROUNDED OR UNGROUNDED: GROUNDED (INLUDE GE) UNGROUNDED FOR UNGROUNDED SYSTEMS: D OPD MUST DISONNET BOTH ONDUTORS OF EAH SOURE IRUIT UNGROUNDED ONDUTORS MUST BE IDENTIFIED PER 210.(). WHITEFINISHED ONDUTORS ARE NOT PERMITTED. 1 2 3 6 7 A D 8 A B IF D/D ONVERTERS ARE USED, HEK THE BOX BELOW THE ORRESPONDING ONFIGURATION D/D ONVERTERS INVERTER D/D ONVERTERS INVERTER ONDUTOR/ONDUIT SHEDULE DESRIPTION AND ONDUTOR TYPE ONDUTOR NUMBER OF SIZE ONDUTORS A USE2 OR PVWIRE EG/GE: B EG/GE: EG/GE: ONDUIT/ABLE TYPE ONDUIT SIZE ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONDUIT OR ABLE AS PERMITTED BY ODE PARALLEL D/D ONVERTERS ON ONE SOURE IRUIT (FIXED UNIT VOLE D/D ONVERTERS) D/D ONVERTERS ARE ALL RUN IN SERIES (FIXED SOURE IRUIT VOLE D/D ONVERTERS)
Solar PV Standard Plan Simplified entral/string Inverter System for One and TwoFamily Dwellings 1 2 3 6 7 8 9 DESRIPTION SOLAR PV MODULE / STRING D/D ONVERTERS INSTALLED? YES / NO (IF YES, STEPS 6 & 8 REQUIRED) SOURE IRUIT JUNTION BOX INSTALLED?: YES / NO OMBINER BOX (STEPS 11 & 12 REQUIRED) SEPARATE D DISONNET INSTALLED?: YES / NO INTERNAL INVERTER D DISONNET: YES / NO ENTRAL INVERTER *SEPARATE A DISONNET INSTALLED?: YES / NO TO LOAD ENTER ON LINE DIAGRAM 3 * onsult with your local AHJ and /or Utility SINGLELINE DIAGRAM # ADDITIONAL INVERTER FOR DIAGRAM #2 INVERTER # 2 HEK A BOX FOR WHETHER SYSTEM IS GROUNDED OR UNGROUNDED: GROUNDED (INLUDE GE) UNGROUNDED FOR UNGROUNDED SYSTEMS: D OPD MUST DISONNET BOTH ONDUTORS OF EAH SOURE IRUIT UNGROUNDED ONDUTORS MUST BE IDENTIFIED PER 210.(). WHITEFINISHED ONDUTORS ARE NOT PERMITTED. 1 2 3 6 7 8 A D 9 A1 B1 D A2 B2 D/D ONVERTERS INVERTER OMBINER ONDUTOR/ONDUIT SHEDULE DESRIPTION AND ONDUTOR NUMBER OF ONDUIT/ABLE ONDUTOR TYPE SIZE ONDUTORS TYPE A1 USE2 OR PVWIRE EG/GE: B1 EG/GE: EG/GE: D EG/GE: ONDUIT SIZE NONOMBINED STRINGS ONDUTOR/ONDUIT SHEDULE (IF APPLIABLE) DESRIPTION AND ONDUTOR NUMBER OF ONDUIT/ABLE ONDUIT SIZE ONDUTOR TYPE SIZE ONDUTORS TYPE A2 USE2 OR PVWIRE EG/GE: B2 EG/GE: ENTER N/A WHERE SUITABLE FOR WHEN NOT USING ONDUIT OR ABLE AS PERMITTED BY ODE IF D/D ONVERTERS ARE USED, THEY ARE RUN IN SERIES (FIXED SOURE IRUIT VOLE D/D ONVERTERS)
SOLAR PV STANDARD PLAN Roof Layout Diagram for One and TwoFamily Dwellings Items required: roof layout of all panels, modules, clear access pathways and approximate locations of electrical disconnecting means and roof access points.