US Solar Codes P2 Reference 6 min read Reviewed September 26, 2026 Nimesh Katariya Nimesh Katariya

SolarAPP+

SolarAPP+ automates code-compliance review for eligible residential solar and storage projects. Availability and local permit steps vary by jurisdiction.

Quick answer

SolarAPP+ (Solar Automated Permit Processing Plus) is a web platform developed by NREL with US Department of Energy support and launched in 2021. It runs automated code-compliance checks on eligible residential PV and battery projects so that participating local jurisdictions can issue permits instantly, though local inspection and utility steps still apply.

How does the SolarAPP+ workflow work?

The installer enters project data and equipment information into SolarAPP+. The platform checks the submission against its supported rules. An eligible application can receive automated approval. A failed check returns information for correction or sends the project toward another review path.

The local workflow does not end at the automated result in every jurisdiction. Some authorities require another portal submission, local payment, contractor registration, or separate building permit. Utility interconnection also remains a separate decision.

Use five project records:

  1. The signed-in address and jurisdiction result.
  2. The current feature listing for PV, storage, and service work.
  3. The platform eligibility result.
  4. The local AHJ instructions and fee schedule.
  5. The utility interconnection application and status.

Where is SolarAPP+ available?

Availability follows participating jurisdictions and supported pathways. A state can appear in the official table while most addresses use another process. A listed row can also describe a pilot, a limited feature set, or one part of a split permit route.

The official SolarAPP+ availability page is the discovery source. Use the signed-in project lookup and the local authority page for the actual address decision.

Our guide to current SolarAPP+ state and jurisdiction availability explains how to verify address, feature, and project eligibility. It also records the dated official table snapshot and its limits.

What systems can qualify?

The current SolarAPP+ eligibility page defines supported building types, electrical limits, battery conditions, mounting types, and excluded project categories. Local authorities can use narrower requirements.

Do not reuse a limit from an older article or another jurisdiction. Check the live eligibility page for each project. Then compare every entered value with the plan set, equipment schedule, and single-line diagram.

The automated route does not cover every residential-looking project. Ground mounts, ballasted systems, multifamily buildings, homeowner-installed projects, service changes, or unsupported storage configurations may need manual review.

What does SolarAPP+ approval prove?

A successful SolarAPP+ review proves that the submitted data passed the supported automated checks. It does not guarantee that the data matches the final drawings or installed system. It also does not prove utility approval, inspection completion, or permission to operate.

Keep these milestones separate:

MilestoneResponsible system or authority
Automated code reviewSolarAPP+
Local permit actionAHJ workflow
Field inspectionAHJ or inspection authority
Interconnection reviewServing utility
Permission to operateServing utility

What should installers verify before submission?

  • Confirm the project address and responsible AHJ.
  • Confirm every requested feature, including storage and service work.
  • Run the current national eligibility checklist.
  • Apply narrower local rules and exclusions.
  • Reconcile platform inputs with drawings and equipment records.
  • Check current platform and local fees.
  • Record the manual fallback when the project does not qualify.

The broader AHJ permit package guide covers the supporting documents. Heaven Designs can prepare the solar permit design package within an agreed scope. The authority controls acceptance and issuance.

Use the SolarAPP+ availability guide for the dated state-presence table and three-gate check. Use the solar permit expediting guide when the project needs a manual route or local coordination.

Frequently Asked Questions

3 commonly searched questions about SolarAPP+.

What is the full form of SolarAPP+?
SolarAPP+ stands for Solar Automated Permit Processing Plus. The plus refers to its coverage of battery storage and related equipment beyond simple rooftop PV. It was built by the National Renewable Energy Laboratory with installers, code officials, and safety organisations as an automated permit review tool.
Which projects are eligible for SolarAPP+?
Eligibility is limited to residential systems that fit the platform's supported configurations and equipment lists in a jurisdiction that has adopted it. Projects outside those limits, such as unusual structural conditions or unsupported equipment, go through the authority having jurisdiction's normal plan review instead of the automated path.
Does SolarAPP+ replace the site inspection?
No. SolarAPP+ replaces the manual plan review step only. The installed system still needs a field inspection by the local authority, and the utility interconnection application and permission to operate are separate processes that the platform does not complete on the installer's behalf.

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