Information for commercial solar electric contractors

The following information will help you better serve your commercial customers with their solar electric project. The major steps that you need to take to apply for a solar interconnection are outlined below.

Step 1 — Review program requirements

Before starting the application process, please review the program requirements Document is a PDF to ensure that your customer's business meets the criteria for a solar electric system. You may also want to review the Commercial Solar Electric Process Checklist Document is a PDF for customers.

Step 2 — Technical interconnection requirements

It is important to understand and comply with SRP's interconnection requirements to ensure the solar electric system is safely interconnected with the electrical grid. The technical resources below will help you understand SRP's requirements.

Step 3 — Application submittal

Contractors must submit a complete application package to SRP on behalf of their customer prior to system installation in order to ensure the system configuration is approved by SRP. The application package must include:

  • A completed Commercial Solar Electric Agreement via PowerClerk
    For access to PowerClerk, our online application tool, please send a request to a solar representative and include the following:
    1. Company name;
    2. Company address;
    3. Arizona ROC license number(s);
    4. Contact name for anyone completing reservation request form;
    5. Contact phone number; and
    6. Contact email.
  • A copy of the executed purchase contract or solar service agreement that includes:
    1. Customer name;
    2. Installation address;
    3. Module manufacturer, model number, and quantity;
    4. Inverter manufacturer, model number, and quantity; and
    5. Cost.
  • A copy of the warranty information as outlined in the program requirements.
  • A copy of the signed lease agreement, which contains all information as outlined in the program requirements (if applicable).
  • If you make changes to any portion of the application at a later date, you must submit to SRP a completed Application Addendum form Document is a PDF.

Application packages can be submitted to SRP in several ways:

  • Email:
  • Fax: (602) 629-7985
  • Mail:
    • SRP Commercial Solar Electric Program
      PAB 355
      P.O. Box 52025
      Phoenix, AZ 85072

SRP will review the application package for completeness. If additional information is needed, SRP will notify the applicant. If everything is in order, SRP will approve the application within seven to ten business days following receipt of the application. An email will be sent notifying the applicant and contractor that the application has been approved.

The following additional information must be received to SRP no later than 90 days from the date the incentive is reserved in order to complete the application process:

  • A site plan diagram that shows:
    1. Customer name;
    2. Installation address;
    3. System size (watt-DC and watt-AC);
    4. Arrangement of the major equipment, including the electrical service entrance section and SRP billing meter;
    5. Location of generator and interface equipment; and
    6. The location of the disconnect switch.
    7. For system expansions, the drawings must show the existing system, as well as the expansion.
  • A three-line electrical diagram that includes:
    1. Customer name;
    2. Installation address;
    3. System size (watt-DC and watt-AC);
    4. All neutral and ground conductors and connections;
    5. Module manufacturer and model number; and
    6. Inverter manufacturer and model number.
  • If the generating facility is greater than one megawatt based on the sum of the nameplate inverter ratings, a remote disconnect schematic and connection diagram will also be required.

Step 4 — Design review

After the application has been approved and the design drawings have been submitted, the project will be assigned to an SRP design consultant who is responsible for reviewing the drawings and performing a pre-construction site visit to ensure the proposed installation will comply with SRP interconnection guidelines. At the time of the pre-construction meeting, the design consultant will let the contractor know if they have approval to proceed with installation or if additional changes are required.

Step 5 — Installation

Upon receiving approval to proceed from SRP, the contractor must obtain all applicable building permits as required by the authority having jurisdiction (AHJ). Once all building permits are obtained, the contractor can then install the equipment according to the specifications approved by SRP and the AHJ.

Step 6 — AHJ inspection

After installation, the contractor will need to request an inspection from the AHJ. The AHJ is responsible for submitting their system clearance to SRP. SRP will not accept clearance notification from any entity other than the AHJ.

If the applicable AHJ does not require building permits or inspections, the contractor must submit an SRP Certificate In-Lieu of Electrical Clearance for Solar Projects (CILC) Document is a PDF to SRP. Both the customer and contractor must sign the CILC.

Step 7 — Final SRP inspection

Once the AHJ has submitted the city clearance or the contractor has submitted a CILC as outlined in Step 6, SRP will perform a final inspection of the system. The purpose of this final inspection is to ensure the actual installation matches the design provided in the application, which was approved by SRP under Step 4. A notification will be left at the site indicating if the system inspection passed or failed.

For applications accepted as of May 1, 2012, an SRP standard fee will be charged for each additional inspection beyond the second inspection. The SRP standard fee is currently $203. The contractor shall not seek reimbursement from the customer for the cost of any re-inspection. This fee is subject to change on an annual fiscal year basis.

Step 8 — Complete and submit necessary paperwork

Upon successful completion of a final inspection, the following documents must be submitted to SRP prior to commissioning. This Interconnect Agreement is available through PowerClerk with the solar application.

  • Distribution Interconnection Agreement for Inverter Based Generators (online versions coming soon):
    • For systems 50kW or less
    • For systems greater than 50kW and less than or equal to 300kW
    • Greater than 300kW and less than or equal to 500kW
    • For systems greater than 500kW

Step 9 — Commissioning

Once the system has passed final inspection and SRP has received and validated all the necessary information described above, SRP will schedule the commissioning. The customer and contractor will be notified of the appointment via email. At the time of commissioning, SRP will set the necessary metering for the solar electric system and perform an interconnection test of the system. Because the equipment must be operated at this time, either the customer's or contractor's presence is required since it is SRP's policy not to operate customer equipment.

Upon successful completion of the commissioning, the system will then be allowed to operate. The customer's equipment should not operate at any time prior to the successful completion of the interconnection test. At this time, the contractor must also submit to SRP an as-built diagram that includes:

  1. Shading obstructions, and
  2. Identification of each string and their assigned inverter.

Contact us

If you have questions about SRP's Commercial Solar Electric Program, please contact a solar representative at (602) 236-4663.