Solar Panel Hail & Storm Damage: What's Real, What's Covered, and What to Do (New York Guide)

What hail size solar panels are actually rated for

The headline number first, because it settles most of the worry: every panel a reputable installer puts on a New York roof is certified under UL 61730 and IEC 61215, and part of that certification is a hail test. The standard fires a 25 mm (1-inch) ice ball at roughly 23 m/s — about 51 mph — at 11 specified points on the panel, and the module has to come through with no visible damage and no meaningful power loss. One inch is the same size the National Weather Service uses to define severe hail. So the baseline panel is, by design, built to shrug off the hail in the overwhelming majority of Suffolk County storms.

Hail terminal velocity scales with stone size: pea-size and dime-size hail (common on Long Island) hits well under the test speed, while the rare golf-ball or larger stones from a strong convective cell carry far more energy. Most coastal Suffolk County hail is small, fast-moving, and survivable. The events that actually break panels are the outliers — large stones, steep impact angle, or an older panel with weaker glass — not an average summer thunderstorm.

Two practical points follow. First, panel brand and glass thickness matter at the margins; premium modules with 3.2–4 mm tempered front glass and robust framing take hail better than budget units. Second, a panel passing the lab test when new does not guarantee it is undamaged after a specific real-world strike — which is exactly why post-storm assessment is its own step rather than an assumption.

Cosmetic vs structural vs invisible: the three kinds of damage

Not all hail marks are equal, and conflating them is where homeowners either overpay for a false alarm or miss a real problem. There are three distinct categories, and only one of them is obvious.

• Cosmetic damage: surface scuffs, light pitting on the glass or frame, or scratches that do not penetrate the glass or disturb the cell. These look alarming but usually have no effect on output or safety. They are documented and monitored, not necessarily replaced.
• Structural damage: cracked or shattered front glass, a dented frame that has racked the laminate, a punctured backsheet, or visibly delaminated layers. This is the obvious case — if you can see broken glass, the panel is compromised, may let moisture in, and can become an electrical hazard. It needs to come out of service.
• Invisible microcracks: hairline fractures in the silicon cells beneath intact glass. The panel looks perfect. The output is not. These are the dangerous category because a visual inspection passes them, yet they interrupt the current paths inside the cell and cause gradual, sometimes worsening, power loss. They are why a real post-storm assessment uses electroluminescence (EL) imaging or thermal scanning, not just a walk-around.

How to spot invisible microcracks (and why your eye cannot)

Microcracks are the reason "the panels look fine" is not the same as "the panels are fine." A hail impact can transmit enough shock through the tempered glass to fracture the brittle silicon wafer underneath while leaving the glass intact. Nothing shows from the ground. Nothing shows on the roof. The only honest way to find them is to make the cell reveal itself.

Electroluminescence (EL) imaging runs current backward through the panel in a dark setting and photographs the near-infrared glow the cells emit; cracked or isolated cell regions show up as dark lines and dead zones against the glow. Thermal (infrared) imaging under load is a faster field screen that flags hot spots where broken cells are dissipating energy instead of producing it. Neither tool is something a homeowner owns, which is the entire point: a credible storm assessment is a technical service, not a glance.

The number that actually tells the homeowner something, though, is in their own pocket. Your monitoring app records production per string and often per panel. A real microcrack problem shows up as a quiet, persistent dip in output for an affected string compared to its pre-storm baseline and compared to neighboring strings under the same sky. Pull up the app, compare the week after the storm to the same conditions before it, and bring that data to the inspection — it focuses the EL scan and strengthens any insurance claim.

What to do RIGHT NOW after a Long Island storm (the exact steps)

This is the part the Reddit threads and the federal pages do not give you: a concrete order of operations for the first 48 hours after a Suffolk County nor’easter or hailstorm. Do these in order.

• Step 1 — Stay safe and stay off the roof. A wet, debris-strewn, possibly still-energized roof is the single most dangerous place after a storm. Assess from the ground. Never touch a panel that is cracked, smoking, or near a downed line.
• Step 2 — Shut it down if anything is visibly broken. If you can see shattered glass, a scorched panel, or exposed wiring, switch the system off at the AC disconnect (the labeled box near your meter or inverter). A cracked panel can still be live and can leak current in the rain. When in doubt, shut it down and call your installer.
• Step 3 — Document everything from the ground. Photograph the full array and each visible mark with timestamps, then photograph the surrounding context — dented gutters, a battered AC condenser, dimpled siding, leaves stripped off trees. That collateral damage is your proof the storm was severe enough to do real harm, and it is what insurers look for.
• Step 4 — Check your monitoring app and record the baseline. Screenshot production for the days before and after the storm. A drop on one string is your earliest, hardest evidence of hidden damage.
• Step 5 — Notify your insurer and open the homeowners claim promptly. Most policies require timely notice. Report it, get a claim number, and ask specifically how rooftop solar is treated under your policy and what your wind/hail deductible is (on Long Island this is often a percentage of dwelling value, not a flat figure).
• Step 6 — Book a qualified re-inspection. Have a NABCEP-credentialed installer perform a full assessment — visual, monitoring-data review, and EL or thermal imaging — and produce a written report. That report is what turns "I think there is damage" into a documented, claimable loss and a clear repair-or-reinstall plan.

How storm damage to the array interacts with the roof underneath

A hailstorm hits the panels and the roof in the same instant, and the two cannot be assessed in isolation — this is the advantage of working with an installer who does both solar and roofing. Hail that dimples asphalt shingles or bruises the mat under the array can compromise the roof even where the panels protect the surface, because the panels shield some shingles and leave the rest exposed, creating an uneven wear pattern an adjuster needs to see.

There is also a sequencing reality. If the roof under a damaged array needs repair, the panels usually have to come off to do it properly and then go back on — a remove-and-reinstall job, not a simple patch. If your roof was already near end of life before the storm, a covered loss can be the moment a roof-and-solar bundle finally makes sense, so you are not paying to detach and reset the same panels twice within a few years. A combined assessment looks at panel condition, roof condition, and flashing/penetration integrity around the mounts together, because storm water finds the weak penetration first.

Reading the damage: a field reference

The table below is how an installer triages what you are looking at. It is a guide to urgency and likely path, not a substitute for a real inspection — the only way to rule out microcracks is imaging.

How lost production gets handled

Two different things get conflated here: the cost to fix the hardware, and the value of the electricity you did not generate. The repair side — replacing broken or microcracked panels, resetting racking, fixing a roof penetration — is what a homeowners claim and the manufacturer warranty address. Tier-1 panels carry product warranties (typically 12–25 years on the panel itself) and a separate performance warranty guaranteeing a minimum output curve over ~25 years, though warranties generally exclude external events like hail, which is precisely why the homeowners policy is the right channel for storm damage.

On the lost-production side, the honest framing matters. A few cloudy weeks of reduced output while a claim is processed is real but usually modest in dollar terms, and on Long Island your net-metering credits cushion it: PSEG Long Island bill credits banked in sunnier months absorb a short shortfall, so a brief dip rarely shows up as a painful bill. What you want to avoid is a microcrack problem that goes undetected for a year, quietly bleeding production the whole time — which is the entire argument for a prompt, imaging-based inspection rather than waiting to "see if it gets worse." Document the dip, get it fixed, and let net metering and the production model do the rest.

Where insurance fits (and where it does not)

For owned rooftop systems, a standard New York HO-3 homeowners policy generally treats the panels as a permanent attachment to the dwelling — like a deck or a security system — so storm and hail damage is usually a covered peril, subject to your deductible. The Long Island wrinkle is the deductible itself: coastal policies frequently carry a windstorm or hurricane deductible set as a percentage of the dwelling value (often 1–5%), not a flat dollar amount, which changes the claim math on a smaller loss. Leased and power-purchase-agreement (PPA) systems are owned by a third party, so damage is handled under that company’s contract, not your policy — read it and know who to call before a storm.

We are installers, not insurance advisors, and we do not quote premiums or promise outcomes — your carrier makes the coverage decision. What we do is the technical half of the claim: the inspection, the EL/thermal imaging, the written assessment with monitoring data, and the repair-or-reinstall scope an adjuster can act on. For the full coverage picture, including owned-vs-leased differences and the percentage-deductible math, see our dedicated insurance guide.

Eastern Suffolk County storm patterns and why local matters

The East End of Long Island has a specific storm climate, and it shapes how we think about array durability. The dominant threats here are nor’easters and tropical systems — prolonged, wind-driven rain and salt-laden gusts that test mounting, flashing, and penetration sealing far more often than they test the panels against large hail. Severe convective hail does happen in summer thunderstorms across Brookhaven, Riverhead, Southampton, and the Forks, but the everyday durability question on the coast is wind uplift and water intrusion, not golf-ball ice.

That is why a coastal install is a different engineering conversation: attachment patterns and racking rated for the local wind load, corrosion-resistant hardware for salt air, and flashing details that survive horizontal rain. It is also why a local installer who has been back to the same roofs after multiple storms is worth more than a national 800-number after a storm event — we know which East End roofs took wind, which took hail, and what the recurring weak points are. EnergiSense works across Eastern Suffolk County and the wider Long Island region, and storm-response inspection and repair is part of what we do, not a referral we hand off.