Path-Q Solar
What information does a utility typically need to assess a proposed solar interconnection?
Answer
A utility typically needs customer and site details, service information, system size and equipment data, a one-line electrical diagram, proposed operating mode, and installer or engineer information. The exact application package, fees, studies, and certifications depend on the utility and project size.
Key points
- Common items include the service address, account or meter details, site plan, system capacity, inverter and module models, and equipment certifications.
- The utility may request a one-line diagram, load information, protection settings, export-control details, and battery information.
- Larger or unusual systems may require engineering studies, supplemental forms, or upgrade analysis.
- Applications may need permits, proof of ownership or authorization, and an authorized installer or engineer.
What it depends on
- Utility interconnection process
- System size, inverter type, storage, and export mode
- Service capacity and site configuration
- Applicable technical standards and study thresholds
Risks and trade-offs
- Incomplete or inconsistent documents can delay review.
- Utility-required upgrades or export controls can change project cost and expected savings.
- An installer estimate is not interconnection approval.
Information you may need
- Current utility application checklist and forms
- Site and service information
- Equipment specifications and certifications
- One-line diagram, site plan, and proposed export settings
Your next step
What to do next
Download the utility's current interconnection checklist and have the installer prepare a complete application package for utility review before equipment is ordered.
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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.
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