Does a solar permit need both an electrical and a structural stamp?

Often yes. Interconnection drawings need an electrical PE. Racking on an existing roof or a ground-mount foundation needs a structural PE when the jurisdiction does not accept the manufacturer’s generic letter alone.

Can you stamp rooftop solar in a high-wind area?

Yes. The attachment and the roof framing are checked for the wind speed at the project address, not the generic speed on a national racking letter.

Do you stamp solar plans drawn by the installer?

Yes. Installer-prepared layouts are reviewed by a PE licensed in the project state and sealed after that engineer takes responsible charge. Errors in the service calculation or the attachment are corrected first.

How much does a solar PE stamp cost?

Solar sets are priced by sheet count, from $100 per sheet down to $25 per sheet. A residential rooftop is usually a short set. A commercial rooftop with structural analysis costs more because it has more sheets.

Services / Solar PV PE stamping

Solar PV PE stamp for roof and ground-mount permits

A solar permit is two stamps more often than one. The interconnection drawings need an electrical PE, and the racking needs a structural PE when the building department will not accept the racking letter by itself. AllInStamp reviews both and seals them with engineers licensed in the project state or province.

Roof-mount and ground-mount arrays
Interconnection single-line and load calc
Racking attachment checked against the roof or foundation
Licensed in the project state or province

Get a PE stamp quote

Electrical scope on a solar permit

Plan checkers look for a single-line that shows the array, inverter, rapid shutdown, disconnects, and the point of connection to the existing service. The load calculation has to show the backfed breaker size against the bus rating and the existing main. A line diagram copied from the last job, with the old service size still on it, is the comment solar permits get first.

Include the module and inverter cut sheets, the existing panel schedule, and any utility interconnection requirement you already have. Supply-side versus load-side connection changes the drawing. Say which one the utility accepted.

Racking, roof structure, and ground-mount foundations

Roof-mount arrays are a structural problem as well as an electrical one. The building department wants to know the roof framing can take the array, that the attachments land on framing, and that the wind and snow criteria are the ones for that address, not the racking maker’s generic letter. A generic letter is often not enough in high-wind and high-seismic jurisdictions.

Ground-mount jobs need the foundation or driven-pier design for the local soils and wind, plus the electrical trench and interconnection. Send the site plan and the geotechnical information if a report was required for the permit. Structural and electrical seals are both applied when both scopes are in the submittal.

Installers, EPCs, and designers

Solar installers use this when their in-house designer is not a PE in the project state, which is most jobs that cross a state line. EPCs use it for commercial rooftops where the host building’s engineer will not seal the array. Homeowners rarely upload solar sets themselves. The contractor does.

Commercial rooftop jobs should name the building type and whether a structural set for the existing roof exists. Residential rooftops should include photos of the attic framing when the original plans are gone. Both are priced by sheet count.

What to upload with a solar set

Upload the plan sheets, the existing service photo or panel schedule, module and inverter data, the racking layout, and the site address. If the utility or the building department already rejected a set, upload the comment letter. Revising a rejected solar permit is faster when the comment is the starting point.

Electrical-only work that is not a solar array — service upgrades, EV charging, tenant power — belongs on the electrical PE stamping page. A solar sheet inside a larger electrical permit can stay on that quote. Tell us at intake so the structural racking check is not missed.

FAQ

Does a solar permit need both an electrical and a structural stamp?: Often yes. Interconnection drawings need an electrical PE. Racking on an existing roof or a ground-mount foundation needs a structural PE when the jurisdiction does not accept the manufacturer’s generic letter alone.
Can you stamp rooftop solar in a high-wind area?: Yes. The attachment and the roof framing are checked for the wind speed at the project address, not the generic speed on a national racking letter.
Do you stamp solar plans drawn by the installer?: Yes. Installer-prepared layouts are reviewed by a PE licensed in the project state and sealed after that engineer takes responsible charge. Errors in the service calculation or the attachment are corrected first.
How much does a solar PE stamp cost?: Solar sets are priced by sheet count, from $100 per sheet down to $25 per sheet. A residential rooftop is usually a short set. A commercial rooftop with structural analysis costs more because it has more sheets.