WHat is a solar interconnection agreement? and why does it matter?
Solar 101 · Kriya Partners
Before a system can legally export power, the utility has to sign off. Here's what that process looks like and where it tends to get stuck.
The short version
Your system needs permission to operate
An interconnection agreement is the utility's official sign-off that a PV system is safe, meets grid standards, and is cleared to both draw from and export to the grid. No agreement, no PTO. No PTO, no net metering - and no getting paid.
It's a utility approval, not a permit. The two run through different channels, on different timelines, with different requirements. Managing both at once - without letting one hold up the other - is most of the job.
The process
From application to PTO
The order of steps 1 and 2 is not always the same. Some utilities, like PG&E, require permit approval before they'll advance an interconnection application. Others let you run both tracks simultaneously. Getting the sequencing wrong is one of the more reliable ways to lose weeks on a project.
Submit the interconnection application
File with the utility: system specs, equipment data sheets, single-line diagrams. A complete, accurate application upfront is the single biggest factor in a fast review. Incomplete submissions get kicked back, and every kickback adds time.
Pull the AHJ permit
The local Authority Having Jurisdiction reviews structural and electrical design. Depending on the utility and AHJ, this may need to happen before the ICX application can move forward - or it can run alongside it. Know which situation you're in before you start.
Pass the inspection
An inspector verifies the installation matches the approved plans: NEC compliance, labeling, rapid shutdown, anti-islanding. A clean install usually means a clean inspection.
Receive Permission to Operate (PTO)
The utility issues PTO and the system goes live. Net metering starts. The project closes out.
Which review track applies?
Not all projects move at the same speed
Utilities route applications into different tracks based on system size and local grid conditions. Knowing which track a project falls into upfront helps set realistic timelines with clients.
Simplified Review
Residential systems under ~25 kW with certified inverters. Typically 15-30 days. Minimal back-and-forth if the application is clean.
Commercial / Larger Systems
More documentation, deeper utility review. Expect 30-90 days. Thorough prep upfront keeps this on the shorter end.
Large-Scale Projects
Grid impact studies required. Timelines range from six months to over a year. Early utility engagement matters here - don't wait until you're ready to submit.
Going deeper
Where experienced developers still lose time
The four steps aren't the hard part. Most people in this industry know the steps. What catches even seasoned developers is that the variables underneath them keep changing.
Utility rules aren't static
Interconnection procedures get updated. Queue positions shift. A process that worked on your last project in the same territory may not apply today - and utilities won't flag the change. You find out when something gets kicked back.
Fast Track eligibility isn't guaranteed by system size
Grid conditions at the specific point of interconnection determine the track - not just kW. A stressed feeder can push a system that looks like a Fast Track candidate into Standard Review or a full study. That's weeks or months you didn't budget for.
Application completeness is still the biggest lever
Even high-volume teams lose weeks to resubmissions. Utility-specific formatting, inverter certification currency, data sheet versions - these are the granular details that trip up operators who aren't interconnection specialists. Every kickback is time you don't get back.
AHJ requirements drift
Jurisdictions update their checklists. A plan set template that cleared inspection a year ago may have gaps today. Without current, jurisdiction-specific knowledge, you're absorbing that risk on every project without knowing it.
Utility follow-up is a skill
Knowing when to escalate, who to contact, and how to frame the conversation with a utility is knowledge built across hundreds of applications. Without it, submitted applications stall - and you won't always know why.
When you're running multiple projects at once, each of these stacks. One stalled interconnection affects draw schedules, contractor availability, reporting timelines. It's not one delay - it's a cascade. This is specialized work, and treating it as a generalist task is where experienced developers still leave time and money on the table.
Don't turn on a system before PTO arrives. Operating without utility authorization can mean fines, shutdown orders, and voided warranties.
Kriya handles interconnection end-to-end - design, engineering, permitting, and PTO. You'll know exactly where a project stands before anything gets switched on.
