Solar on a standing seam roof is one of the cleanest ways to mount an array: the racking grips the raised seams, so the modules can be attached without drilling through the roof metal. The roof and the array still have to be planned together. Seam type, clamp model, snow, wind and the timing of a roof replacement all shape the result.
Below we explain how seam clamps work, why the seam profile matters, whether to replace the roof first and what New Jersey’s solar incentive program says as of October 2026. Architectural Metal Panels fabricates standing seam roof panels and trim in our New Brunswick, NJ shop. Your roofer installs the roof and your solar company installs the array; this guide helps the three of you plan together.
How do solar panels attach to a standing seam roof?
Clamps tighten onto the vertical seams, and rails or module brackets bolt to the clamps. The attachments do not pass through the roof panel, so there are no attachment holes to seal.
S-5!, one maker of seam attachments, says its clamps attach solar arrays, snow guards and other equipment with zero roof penetration. Its round-point setscrews grip the seam while protecting it, and the company says this leaves roof warranties intact (S-5! roof clamps). Other attachment brands work on the same idea.
Two things matter for an owner. The clamp has to be made for your exact seam profile, and the number and spacing of attachments have to be engineered for your roof and its loads.
Compare that with a shingle roof, where racking is typically lagged into the rafters through flashed penetrations. Each of those is a spot that has to stay watertight for the life of the array.
Does the seam type matter for solar?
Yes. Each clamp model fits particular seam shapes and heights, so a snap-lock panel and a mechanically seamed panel usually need different clamps. Our panels come with 1, 1.5, 1.75 or 2-inch seams; confirm that the clamp maker lists your exact profile before either one is ordered.
Snow is the other reason to think about seam type. Sheffield Metals warns that snap-lock seams are more prone to disengaging from the thermal movement of built-up snow and ice, and it suggests mechanically seamed panels in snowy regions. An array changes how snow sits on and slides off a roof. On a new roof that will carry solar, price our 1.5-inch mechanical lock panel alongside the 1.75-inch snap-lock.
Standing seam panels also grow and shrink with temperature on their clips. Ask the solar designer to confirm the racking layout works with your panel’s clip system, especially on long runs from eave to ridge.
Should you replace the roof before adding solar?
If the existing roof is near the end of its life, yes. Taking an array down and putting it back up so the roof under it can be replaced is work you avoid by doing the roof first.
Asphalt roofs are the usual case, and our guide to why asphalt roofs fail explains the warning signs. If you plan to keep an older roof under a new array, ask the solar company in writing what removing and reinstalling the system would involve later.
On most projects, the roof and the array come from two different contractors. Give your solar designer the panel profile, seam height and seam spacing before the roof panels are ordered, so the layout lines up with the seams. If you have not chosen a solar company yet, keep the panel’s spec sheet with your house records so an array can be planned later.
What should you send to order the roof panels?
Send the panel lengths and quantities your roofer measured, or the roof plans, with the seam profile, gauge and color. Tell us the roof will carry solar, so the seam profile can be checked against the clamp maker’s list before fabrication.
We fabricate the standing seam panels and matching trim to those dimensions; we do not measure on site. Written quotes come back within 24-48 hours, and standing seam panels typically take 1-2 days to fabricate. The order is delivered or picked up at our shop, and our submittals and spec sheets page explains how to get the panel data your solar designer needs.
What should be planned before the array goes up?
Before solar goes on a standing seam roof, settle the array area, the attachments, snow management, wiring paths and warranty terms. Each one is harder to change once the modules are in place.
- Array area and clear paths. Your solar designer works out the access paths and clearances that local officials require.
- Clamp and layout. A clamp matched to the seam, with the attachment count taken from an engineered layout.
- Site-specific loads. New Jersey guidance in DCA Bulletin 19-1 tells designers to take snow and wind values from ASCE 7-based tools for the exact address, not one statewide number.
- Snow below the array. Snow can slide off smooth modules in one mass, and snow guards for metal roofs can clamp to the same seams as the racking.
- Wiring path. Decide where conductors run along the roof and where they enter the house, keeping that entry away from valleys.
- Compatible metals. Clamp and fastener metals should suit the panel metal; ask the clamp maker.
- Warranty sign-off. Get written confirmation that the attachment method is acceptable to the coil or panel maker and to your roofer.
The same planning applies to low-slope buildings. On a commercial metal roof, seam clamps can carry an array across a large area with no attachment holes, and the loads still need engineering for the site.
What New Jersey solar incentives apply in 2026?
New Jersey’s current framework is the Successor Solar Incentive (SuSI) Program. Residential systems fall under its Administratively Determined Incentive (ADI) track, which pays a fixed incentive in SREC-IIs for 15 years.
The Board of Public Utilities approved SuSI on July 28, 2021 (NJ BPU). The ADI track covers net-metered projects of 5 MW or less, including all residential systems, while larger projects compete in a separate competitive track.
In a 2026 order, the BPU lowered the residential net-metered ADI incentive for registrations received on or after July 27, 2026, and left non-residential and community solar levels unchanged (BPU order). The NJ Clean Energy Program says ADI registrations are accepted first-come, first-served until a segment’s block fills or June 1, 2027, whichever comes first. Incentive levels can change again, so ask your solar contractor to show the current level, dated, in its proposal.
Does solar affect a metal roof warranty?
Solar on a standing seam roof should not affect the roof warranty if the attachment method is one the coil or panel maker accepts and the solar installer follows the clamp maker’s instructions. Get that acceptance in writing. The installation warranty comes from your roofer and the finish warranty from the coil maker, not from the solar company.
Finish warranties on painted metal set their own terms for attachments and exposure, and our warranties page explains how they work. Because seam clamps do not pierce the panels, removing an array later does not leave attachment holes to patch. For the bigger picture, see the benefits of metal roofing and what drives the cost of metal roof panels.
Solar on metal roof questions
Can solar panels go on a standing seam roof without drilling?
In most cases, yes. Seam clamps grip the raised seams and the racking attaches to the clamps, so the roof panels are not pierced at the attachments. The clamp must be matched to your seam profile and the layout engineered for your loads.
Is standing seam a good roof for solar compared with asphalt shingles?
For the attachment itself, standing seam has an advantage: clamps avoid the screwed and flashed penetrations typically used on shingle roofs. Overall value depends on the roof’s age, the house and the system design, so compare written proposals.
What is New Jersey’s residential solar incentive in 2026?
Residential systems fall under the ADI track of New Jersey’s Successor Solar Incentive Program, which pays SREC-IIs for 15 years. The BPU lowered the residential level for registrations received on or after July 27, 2026, so ask your solar contractor for the current, dated figure.
Should I put snow guards below a solar array?
Often, yes, if people, cars, gutters or lower roofs sit below the array. Snow can slide off smooth modules in one mass, and snow guards can clamp to the same seams as the solar racking.
Can I add solar later to a new standing seam roof?
Yes. Because clamps attach to the seams, an array can be added years after the roof without new holes. Plan the array area and keep the panel profile, seam height and seam spacing on file for the solar designer.
Roof first, then solar
Planning solar on a new metal roof?
Send the panel lengths and quantities your roofer measured, or the roof plans, and tell us the roof will carry solar. We reply with a written quote within 24-48 hours for the standing seam panels and trim. Orders are delivered within about a 5-hour drive of our New Brunswick shop, or picked up during office hours, Monday–Friday 7 AM–5 PM.