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 and whether to replace the roof first. We also cover what to settle before the array goes up and what New Jersey’s solar incentive program says as of October 2026. Architectural Metal Panels fabricates standing seam roof panels and trim in its New Jersey shop. The roof is installed by your roofer and the array by your solar company; this guide helps the three of you plan together.
How do solar panels attach to a standing seam roof?
Clamps are tightened 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. It uses round-point setscrews that 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, which means a snap-lock panel and a mechanically seamed panel usually need different clamps. Confirm that the clamp maker lists your panel 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 a mechanical seam alongside 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 a cost you avoid by doing the roof first.
Asphalt roofs are the usual case. 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 it charges to remove and reinstall the system later.
Sales tax is one more detail to know. New Jersey treats a full new roof as an exempt capital improvement. When the owner gives the contractor a completed Form ST-8, no sales tax is charged on the job, while repairs remain taxable (NJ Division of Taxation, S&U-3).
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 your panels come from our shop, ask us for the panel’s spec sheet to pass along. If you have not chosen a solar company yet, keep that spec sheet with your house records so an array can be planned later.
What do we need to fabricate the roof panels?
Send the panel lengths and quantities your roofer measured, or the roof plans, with the seam profile, gauge and color. We fabricate the standing seam panels and matching trim to those dimensions; we do not measure on site. Tell us the roof will carry solar, so the seam profile can be checked against the clamp maker’s list before fabrication. The order is delivered in New Jersey or picked up at our shop.
What should be planned before the array goes up?
Settle the array area, the attachments, snow management, wiring paths and warranty terms before the first clamp goes on. Each one is harder to change once the panels 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. 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. Larger projects compete in a separate competitive track.
In a 2026 order, the BPU lowered the residential net-metered ADI incentive from $85 to $77 per SREC-II, or per megawatt-hour, for registrations received on or after July 27, 2026 (BPU order). Non-residential and community solar levels did not change in that 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. We do not estimate solar payback, so ask your solar contractor to show the current incentive, dated, in its proposal.
Does solar affect a metal roof warranty?
It should not, 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, because 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 come from the coil manufacturer, and they set their own terms for attachments and exposure. Our warranties page explains how we help you get the finish warranty documents for the coil used in your panels. Because seam clamps do not pierce the panels, removing an array later does not leave attachment holes to patch.
For the bigger picture on durability, energy and upkeep, see the benefits of metal roofing, and for budgeting, our guide to metal roof panel prices.
Request a quote
Or call (732) 201-5224, Mo-Fr 07:00-17:00.
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 penetrated 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. For registrations received on or after July 27, 2026, the BPU set the residential net-metered level at $77 per SREC-II, down from $85. Levels can change, so confirm the current 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. 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 give the solar designer your panel profile, seam height and seam spacing.
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 or questions for the standing seam panels and trim, fabricated in our New Jersey shop for delivery or pickup. Your roofer installs the roof and your solar company installs the array.