CGB COMMISSIONING INSPECTION

• Site conducted

  Select

• Site Name

• Contact Info

• Location
  Address

• Prepared by

• Conducted on

  Date

• Weather Conditions

• Irradiance

• Module and inverter count with specifications.

• Does the system Pass the inspection? Is the system operating safely and to full capacity?

• Explain briefly any issues any issues found or follow up required.

• Solar connection point and disconnecting means

  Media

• Does the Insulation Resistance of the AC conductors from the AC disconnect to the interconnection point have a minimum resistance of 20 megohms in 1 min or less between conductors and from each conductor to ground?

  Safe

  At Risk

  N/A

Load Side Connection Inspection

• Is this a load side connection?

  Yes

  No

  N/A

• Are the circuit conductors have sufficient ampacity?

  Yes

  No

  N/A

• Are circuit conductors UL listed? Please take picture of conductor specifications.

  Media

• Does the OCPD is sufficient to protect the circuit conductors?

  Yes

  No

  N/A

• Grounded conductors properly identified?

  Yes

  No

  N/A

• The GEC is present and sufficiently sized?

  Yes

  No

  N/A

• GEC and Termination

  Media

• The GEC is continuous (or irreversibly spliced)?

  Yes

  No

  N/A

• Are the Ferrous conduits and the enclosure are appropriately bonded to the GEC?

  Yes

  No

  N/A

• Is the AC characteristics label present and suitable for the environment (voltage and amperage)?

  Yes

  No

  N/A

• PV breakers are properly identified?

  Yes

  No

  N/A

• Are Dissimilar metals separated and will not cause a galvanic reaction?

  Yes

  No

  N/A

• Is there an Inverter directory present?

  Yes

  No

  N/A

• Is the Backfed breaker sized to protect circuits?

  Yes

  No

  N/A

• Do the source breakers follow 120% rule?

  Yes

  No

  N/A

• Is the backfed breaker properly located in panel?

  Yes

  No

  N/A

• Are there proper clearances maintained and live parts secured?

  Yes

  No

  N/A

• PV Breaker

  Media

• PV Breaker Specs and readings: Breaker / Circuit #, Manufacturer, Model, Voltage, Amperage, KAIC Voltage and Current readings at the breaker.

• Marked Torqued Connections

  Media

• Torque all connections

  Sign

Line Side Connection

• Is this a line side connection?

  Yes

  No

  N/A

• Good

  Fair

  Poor

  N/A

• Is the Disconnect service-rated and have a current rating of at least 60 Amp?

  Yes

  No

  N/A

• Do the circuit conductors have sufficient ampacity?

  Yes

  No

  N/A

• Are the new service entrance conductors are less than 10 feet?

  Yes

  No

  N/A

• Is the OCPD is sufficient to protect the circuit conductors?

  Yes

  No

  N/A

• Is the disconnect for the utility conductors on the LINE terminals (if fusible)?

  Yes

  No

  N/A

• There is no OCPD in the grounded conductor?

  Yes

  No

  N/A

• Does the AIC rating on the OCPD meet, or exceed the rating of other main OCPD on the premises?

  Yes

  No

  N/A

• Is the neutral isolated and not bonded to the PV disconnect enclosure/GEC?

  Yes

  No

  N/A

• GEC and Termination

  Media

• Is the GEC is present and sufficiently sized?

  Yes

  No

  N/A

• Is the GEC is continuous (or irreversibly spliced)?

  Yes

  No

  N/A

• Are the ferrous conduits and the enclosure appropriately bonded to the GEC?

  Yes

  No

  N/A

• Is the AC characteristics label is present and suitable for the environment (voltage and amperage)?

  Yes

  No

  N/A

• Is the Power source directory present, denoting all locations of power sources and disconnects on premises, at each service equipment location?

  Yes

  No

  N/A

• Is the AC disconnect label is present and suitable for the environment?

  Yes

  No

  N/A

• Are dissimilar metals separated and will not cause a galvanic reaction?

  Yes

  No

  N/A

• Marked torqued Connections

  Media

• Torque all connections

  Sign

• Utility, ZREC, DAS Meters

  Media

• Does the Insulation Resistance of the AC conductors from the Meter to the AC Disconnect have a minimum resistance of 20 megohms in 1 min or less between conductors and from each conductor to ground?

  Safe

  At Risk

  N/A

• Does the meter enclosure have sufficient ampacity?

  Yes

  No

  N/A

• Are grounded conductors isolated from enclosure?

  Yes

  No

  N/A

• Are the ferrous conduits and the enclosure appropriately bonded to the EGC?

  Yes

  No

  N/A

• Are dissimilar metals separated and will not cause a galvanic reaction?

  Yes

  No

  N/A

• Torque All Connections

  Sign

• Marked Torqued Connections

  Media

• AC Disconnect. Inside and Out

  Media

• Does the Insulation Resistance of the AC conductors from the AC disconnect to the AC Combiner have a minimum resistance of 20 megohms in 1 min or less between conductors and from each conductor to ground?

  Safe

  At Risk

  N/A

• Is the Disconnect service-rated and have a current rating of at least 60 Amp?

  Yes

  No

  N/A

• Is the disconnect for the utility conductors on the LINE terminals (if fusible)?

  Yes

  No

  N/A

• Where is the Neutral and GEC bonded together?

  In the Main

  In the Disconnect

• Are the ferrous conduits and the enclosure appropriately bonded to the GEC?

  Yes

  No

  N/A

• Torque All Connections

  Sign

• Marked Torqued Connections

  Media

• AC Combiner or Load Center

  Media

• Does the Insulation Resistance of the AC conductors from the AC combiner to the Inverter have a minimum resistance of 20 megohms in 1 min or less between conductors and from each conductor to ground?

  Safe

  At Risk

  N/A

• Does the number of branch circuits match the plan set?

  Yes

  No

  N/A

• Do the conductors have sufficient ampacity for each branch circuit?

  Yes

  No

  N/A

• Does the Overcurrent Protective Device (OCPD) for the conductors have a rating sufficient to protect them?

  Yes

  No

  N/A

• Are the conduit penetrations are properly sealed between conditioned and unconditioned space?

  Yes

  No

  N/A

• Are the conduits properly supported?

  Yes

  No

  N/A

• The conduits are not being used as conductor support?

  Yes

  No

  N/A

• The enclosure is properly grounded?

  Yes

  No

  N/A

• Is the Grounding equipment properly installed?

  Yes

  No

  N/A

• Is the enclosure labeled as a disconnect?

  Yes

  No

  N/A

• AC characteristics label present (voltage and amperage)?

  Yes

  No

  N/A

• “Multiple Sources” indication label present?

  Yes

  No

  N/A

• The sum of all overcurrent devices (excluding main) do not exceed the rating of the buss bar?

  Yes

  No

  N/A

• The enclosure is labeled “Do Not Add Loads”?

  Yes

  No

  N/A

• Is the main breaker is fastened in place?

  Yes

  No

  N/A

• Grounded conductors are isolated from enclosure?

  Yes

  No

  N/A

• Torque All Connections

  Sign

• Marked Torqued Connections

  Media

• Take voltage readings of power supplies

• Do current transducer readings match field meter readings?

  Yes

  No

  N/A

• Do sensor readings match field meter readings?

  Yes

  No

  N/A

• DAS (Locus)

  Media

• Inverters

  Media

• Does the Insulation Resistance of the DC conductors from the Inverter to the Combiner or modules have a minimum resistance of 20 megohms in 1 min or less between conductors and from each conductor to ground?

  Safe

  At Risk

  N/A

• Check insulated gate bi-polar transistors and inverter boards for discoloration. Use inspection mirror if necessary.

• Check input dc and output ac capacitors for signs of damage from overheating

• Record weather conditions including cloudy or sunny.

Ambient Temperature

• Record all voltage and current readings from the front display panel.

• Is the cabinet, ventilation system, and insulated surfaces clean?

  Yes

  No

  N/A

• Are the terminals and cables free from corrosion/overheating?

  Yes

  No

  N/A

• Are the Torque terminals, connectors, and bolts marked?

  Yes

  No

  N/A

• Torque All Terminals if not already

• Are the ac and dc surge suppressors free from the appearance of damage or burn marks?

  Yes

  No

  N/A

• Do all of the safety devices operate correctly? (Emergency stop devices, door switches, ground fault detector interrupter).

  Yes

  No

  N/A

• Inspect (clean or replace) air filter elements.

• If manufacturer-trained personnel are available on-site, install and perform any recommended software upgrades.

• Check all fuses at the inverter and work out to the combiner boxes.
  
  

• Leave all fuse holders open.

• Torque all fuse holders

• Please record or capture the following info: Inverter manufacturer, Model, Serial #, Number of inputs, circuit polarity. Perform IV curve, Voc, Isc, Vmpp, Riso Test for each string using Seaward Solar Analyzer Tool. Paste or record data below.

• Inverter Screens

  Media

• Check all fuses for continuity.

• Close all fuse holders.

  Sign

• Fuses closed.

  Media

• Unlock and Turn on all disconnects, Starting from the solar tie in to the inverter. Follow manufacturers instructions for inverter

• All fuse Holders should be closed

• Confirm Inverter operation on inverter screen or using indicator lights.

• Confirm system operation on DAS or remote monitoring.

• Confirm DAS is still connected and reporting.

• Inverter or DAS visual confimation of system operation

  Media

• Let System Run for 2 Hrs.

  Date

• Take picture of Inverters, irradience meter and temperature sensor after 2 hour run time to confirm system operation for calculations.

  Media

• Calculate the expected peak DC power output of the System, WattsDC-estimated, at the measured cell temperature by multiplying the System DC nameplate capacity by (1 - KCTA), which is the DC power adjustment due to cell temperature difference from the standard test condition, 25 C, where KCTA = (25- Tcell) times the Temperature Coefficient of Maximum Power for the module (from the module specification datasheet, %/deg C) and Tcell = module cell temperature, deg C, measured at the time the System power reading is taken. [Example: SunTech 280 lists its Max Power Temp Coeff as -0.47. So, for Tcell = 10 deg C, then (1 - KCTA) = 1 + 7.05% = 1.0705]

• Calculate the expected peak AC power output of the System, WattsAC-estimated, by multiplying WattsDC-estimated in (ii) by 0.77 (the standard PVWatts DC-AC derate factor),

• After allowing for fifteen (15) minutes of full sun exposure, obtain a real-time solar irradiance measurement at the array (W/m2) using the precision spectral pyranometer provided with the system or, if not available, with a calibrated, hand-held meter

• Calculate the percent of peak irradiance under the test conditions by dividing the measured irradiance by 1000 W/m2 (the peak irradiance level at which the modules are tested).

• Record the total System AC power output, Watts AC-measured, from the revenue grade energy production meter or from the inverter(s).

• Divide the WattsAC-measured by the percent peak irradiance, as determined under (v), above. This yields the corrected rated AC peak power output of the system, WattsAC-corrected. This value will be at least 90% of the WattsAC-estimated value calculated in step (iii) above.

• Clean up site and Complete final visual inspection of all components.

• Are all roof penetrations are properly flashed and sealed?

  Yes

  No

  N/A

• Roof Penetrations

  Media

• Is roof drainage is adequate, roof drains are not clogged, and confirm that there are no signs of water pooling in the vicinity of the array?

  Yes

  No

  N/A

• Is the array Unshaded? Please describe if there is any new vegetation growth or other new shade items such as a satellite dish?

  Yes

  No

  N/A

• Array

  Media

• Are the footings of a ground mount system secure and free of erosion?

  Yes

  No

  N/A

• Is proper system signage in place?

  Yes

  No

  N/A

• Electrical Equipment (on Roof)

  Media

• Are there appropriate expansion joints are used where needed in long conduit runs?

  Yes

  No

  N/A

• Are electrical enclosures are only accessible to authorized personnel, are secured with padlocks or combination locks, and have restricted access signage?

  Yes

  No

  N/A

• Are the outside of enclosures and the racking system free from corrosion?

  Yes

  No

  N/A

• Is the site clean? Check for cleanliness throughout the site—there should be no debris in the inverter pad area or elsewhere

  Yes

  No

  N/A

• Is the array wiring neat and secure?

  Yes

  No

  N/A

• Array Wiring ( module interconnections, Between arrays)

  Media

• Is the array free from signs of animal infestation?

  Yes

  No

  N/A

• Does roof appear to be in good condition, with no signs of leaking or damage; Roof is free of debris?

  Yes

  No

  N/A

• Under Array

  Media

• Are all racking splices are properly supported per manufacturer requirements? (generally splices must be supported on both sides of the joint by a structural attachment)

  Yes

  No

  N/A

• Are all racking clamps present and secured?

  Yes

  No

  N/A

• Modules cannot be moved by pushing or pulling with one hand ?

  Yes

  No

  N/A

• Rafter spacing/material matches construction documents?

  Yes

  No

  N/A

Array

• Are circuit conductors are properly supported and are not touching the roof surface?

  Yes

  No

  N/A

• Circuit conductors are same conductor type/size as on plan set? If No investigate stringing configuration.

  Yes

  No

  N/A

• Are circuit conductors UL listed? Please take picture of conductor specifications.

  Media

• Module manufacturer/model matches plan set?

  Yes

  No

  N/A

• Module Nameplate

  Media

• Are the modules are effectively grounded using lugs, WEEBs, or a racking integrated grounding method?

  Yes

  No

  N/A

• Racking Ground Method

  Media

• Modules and racking are properly secured?

  Yes

  No

  N/A

• Racking Roof Attachment or Ballast

  Media

• Are the DC optimizers or Microinverters are properly grounded?

  Yes

  No

  N/A

• Are the Wire ties UV-rated (generally black)? Please indicate Plastic or Metal

• All electrical connections are secured to ensure no arcing? Also check to make sure dc conductors have proper spacing.

  Yes

  No

  N/A

• Racking system is properly grounded? (EGC bonding the rails)

  Yes

  No

  N/A

• Are the conductors are properly identified on the roof? (ungrounded, grounded, grounding)

  Yes

  No

  N/A

• Array Home Run Wiring

  Media

• Are outdoor components are UL-listed for the environment?

  Yes

  No

  N/A

• Are the DC conduits is labeled “WARNING: PHOTOVOLTAIC POWER SOURCE” every 10 feet, and is reflective, and meets color and size requirements?

  Yes

  No

  N/A

• DC Conduit Run

  Media

DC Optimizer

• DC Optimizer chassis is properly grounded per manufacturer’s instructions

  Yes

  No

  N/A

• It the EGC protected if smaller than #6AWG ?

  Yes

  No

  N/A

• DC Optimizer Nameplate

  Media

• Is the DC Optimizer GEC is sufficiently sized per manufacturer instructions?

  Yes

  No

  N/A

• Rapid Shutdown label is present and meets the requirements of NEC 690.56(C). After 2014

  Yes

  No

  N/A

• Is the DC output circuit conductor insulation type rated for environment? (Shall not be type: USE-2, THWN-2, RHW-2)

  Yes

  No

  N/A

Microinverters

• Microinverter Nameplate

  Media

• Is the Microinverter chassis properly grounded per manufacturer’s instructions?

  Yes

  No

  N/A

• Is the EGC protected if smaller than #6 AWG ?

  Yes

  No

  N/A

• Microinverter GEC is sufficiently sized per manufacturer instructions?

  Yes

  No

  N/A

• Rapid Shutdown label is present and meets the requirements of [NEC 690.56(C)]?

  Yes

  No

  N/A

Junction Box Inspection

• Junction Box (inside and outside)

  Media

• Are the wire nuts and splices suitable for the environment?

  Yes

  No

  N/A

• Is the Junction box is UL listed for the environment?

  Yes

  No

  N/A

• Grounding equipment is properly installed?

  Yes

  No

  N/A

Combiner Box / Inverter Inspection

• Picture of Combiner Box. (Inside and Out)

  Media

• The number of strings match the plan set?

  Yes

  No

  N/A

• Do the conductors have sufficient ampacity for each string?

  Yes

  No

  N/A

• Are the DC conductors in metal when on or inside a building?

  Yes

  No

  N/A

• DC Building Penetration

  Media

• Are conduit penetrations are properly sealed between conditioned and unconditioned space?

  Yes

  No

  N/A

• Inside or around building penetration

  Media

• Are the conduits properly supported?

  Yes

  No

  N/A

• The conduits are not being used as conductor support?

  Yes

  No

  N/A

• Is the enclosure is properly grounded?

  Yes

  No

  N/A

• Is the grounding equipment properly installed?

  Yes

  No

  N/A

• Is the enclosure is labeled as a PV?

  Yes

  No

  N/A

• DC characteristics label is present?

  Yes

  No

  N/A

• Are the ungrounded DC conductors are properly identified (shall not be white, gray, or white striped)

  Yes

  No

  N/A

• Combiner Box / Inverter Wiring

  Media

• Is the max string voltage below inverter max?

  Yes

  No

  N/A

• Are the inverter string fuses rated for use in application?

  Yes

  No

  N/A

• DC Fuse Specs

  Media

• Are the DC and AC disconnecting means are located within sight of or in each inverter

  Yes

  No

  N/A

• Inverter disconnecting means

  Media

• AFCI protection is present and enabled?

  Yes

  No

  N/A

• System is equipped with Rapid Shutdown (If required) Check install date.

  Yes

  No

  N/A

• System is marked with a permanent label with the following wording: “PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN”? (IF Required)

  Yes

  No

  N/A

• Check to make sure entire system is operational. ( If necessary, check current on each string in the combiner box to ensure it is operational.)

  Yes

  No

  N/A

• Description of Photos

• Representative set of modules from each inverter of combiner.

  Media

• Combiner or DC J boxes.

  Media

• Inverters

  Media

• AC Junction Boxes

  Media

• Disconnects

  Media

• Load Centers

  Media

• Meters

  Media

• Transformers

  Media

• Switchgear

  Media

• Utility Meter Field Readings (4 and 10 or 4 and 24)

• Utility Meter

  Media

• ZREC Meter Field Readings (4 and 10)

• ZREC Meter

  Media

• DAS System Field Readings (LOCUS)

• DAS Meter

  Media

• If applicable, follow the inverter manufacturer guidelines for a controlled shutdown using the HMI keypad to navigate and select a shutdown.

• If the inverter has an On/Off Switch, Turn it off.

• Turn the ac disconnect switch on the inverter off.

• Turn the dc disconnect switch on the inverter off.

• Turn any remaining external disconnect switches connected to the inverter off.

• Repeat for all inverters and switches to completely isolate the entire PV system from the grid and the inverters from the PV power source.

• Please sign once all has been totally shutdown.

  Sign

• System Inspection Complete

  Sign