Information for commercial solar installers
See the steps you’ll need to take to safely complete solar interconnection.
On this page:
Below you’ll find information to help you complete the solar interconnection process for your commercial customers.
Download the Commercial Solar Interconnection Checklist.
We’re here if you have any questions. Just contact an SRP solar representative at (602) 236-4663(602) 236-4663.
Need to submit, review or edit your application? Find the online application via PowerClerk.
Contractors must apply for and receive approval from SRP before system installation.
Download the third party customer authorization form for interval data requests.
You can apply online using our PowerClerk online application.
Completing your application package
Your online application package must include a completed Commercial Solar Electric Agreement (available in PowerClerk).
You must also upload the required documents below:
|Required document||Must Include|
|Executed purchase contract or solar service agreement||
|Warranty information||See specifications in our interconnection requirements|
|Signed lease agreement||See specifications in our interconnection requirements|
|Site plan diagram||
|Three-line electrical diagram||
|One-line electrical diagram and relay schematic|
What to expect from application to commissioning
Once your application has been received, it typically takes seven to 10 business days for review and approval.
Here’s what to expect after your application is approved:
SRP design review
Once your application is approved, SRP will assign a design consultant to review the drawings and visit the site pre-construction to make sure the proposed installation complies with SRP’s interconnection guidelines.
Installation and initial inspection
Once you get the approval to install, you must obtain all applicable building permits as required by the authority having jurisdiction (AHJ). See the full steps below.
Final SRP inspection
Once the city clearance or the Certificate-In-Lieu of Clearance (CILC) has been received, SRP will perform a final inspection of the system and will leave a notification at the site indicating whether the system passed or failed.
Sign the interconnection agreement
Once you pass your SRP system inspection, you must submit a signed Distribution Interconnection Agreement to SRP prior to commissioning. The agreement is available in our PowerClerk online application. A CILC is provided in lieu of city clearance for projects not requiring building permits or inspections by the authority having jurisdiction.
SRP will schedule the commissioning and notify the customer and contractor of the appointment through email.
At the time of commissioning, SRP will set the metering for the solar power system and perform an interconnection test of the system. The customer or contractor must be present to operate the equipment. The customer's equipment may not operate at any time prior to the successful completion of the interconnection test.
Upon successful completion of the commissioning, the system will be permitted to operate.
General and technical requirements
Get familiar with SRP’s general and technical requirements.
Click to download each resource.
Review before you apply:
- Interconnection requirements – Make sure your customer's business is eligible and that solar will meet their energy needs.
- Process checklist – Learn how to apply for and obtain a solar interconnection.
Review before interconnection:
- Interconnection Handbook – For generating facilities interconnecting to the distribution system.
- Electric service specifications – Information and general specifications about the electricity supplied from SRP's lines.
- Rules and regulations – Learn about SRP’s conditions of electric service, billing and payment, construction standards and more.
- Buyback Service Rider – See our terms for the sale of energy back to SRP, where applicable.
Review if your generating facilities are greater than 300 kW:
Technical review and study requirements – To ensure safety and reliability, a technical review is required for systems greater than 300 kW-AC.
Review if your generating facilities are 1 MW and greater:
Facilities rider – Required for inverter-based generating facilities 1 MW and greater in size.
- Relay Protections are required on facilities 1 MW and greater. You must submit a Relay Schematic and Connection Diagram with your application.
Telemetry requirements – Generating facilities 1 MW and greater will require telemetering equipment and telecommunications at the customer’s expense.
Standby electric service rider – Required for inverter-based and non-inverter-based generating facilities 3 MW and greater.
Submitting your agreement
Once you pass your SRP system inspection, you must submit a signed Distribution Interconnection Agreement to SRP before commissioning. This agreement is available through the PowerClerk online application.
Here are a few samples:
- Sample distribution interconnection agreement, inverter-based generators less than 1 MW
- Sample distribution interconnection agreement, inverter-based generators 1 MW and greater
- For nonprofits: Power Purchase and Sale Agreement
- For nonprofits: SRP Commercial Solar Energy Program Supplement to Program Requirements