Why Is My Solar Production Dropping After a Storm? 5 Solutions That Work

If you suspect your solar panels have suffered hail damage, the most common indicator is a sudden, unexplained drop in energy production visible on your monitoring app. The quickest fix is to perform a visual ground-level inspection with binoculars to identify cracked glass or "bruising" on the cells. If damage is confirmed, you must contact your installer to document the impact for an insurance claim, as cracked panels can create fire hazards or system failures.

Quick Fixes:

• Most likely cause: Impact-related glass fractures → Fix: Professional panel replacement via insurance claim.
• Second most likely: Micro-cracking (invisible damage) → Fix: Diagnostic thermal imaging or electroluminescence (EL) testing.
• If nothing works: Contact Boston Solar for a comprehensive system health audit and warranty verification.

What Causes Solar Panel Hail Damage?

Solar panel damage during New England summer storms is typically caused by high-velocity kinetic impact that exceeds the panel's UL 1703 or IEC 61215 certification limits. While most Tier 1 panels are rated to withstand 1-inch hail at 50 mph, extreme weather can surpass these thresholds [1]. Common causes include:

1. Large Diameter Hail: Ice stones exceeding 1.25 inches can shatter the tempered protective glass instantly.
2. Wind-Driven Velocity: High winds during Massachusetts thunderstorms accelerate hail, increasing the force of impact beyond vertical fall speeds.
3. Micro-cracking: Smaller hail may not break the glass but can cause internal fractures in the silicon wafers, leading to "hot spots" [2].
4. Seal Failure: Repeated strikes can weaken the specialized adhesive between the glass and the frame, allowing moisture ingress.
5. Accumulated Stress: Older systems may have existing microscopic fatigue that fails under the stress of a new storm.

How to Fix Solar Panel Hail Damage: Solution 1 (Visual Inspection)

The first step in addressing potential damage is a safe, ground-level visual assessment. Do not climb onto your roof, especially after a storm, as surfaces may be slick or structurally compromised. Use high-powered binoculars to scan each panel for "spiderweb" cracking patterns or shattered glass. According to 2026 industry safety standards, any breach in the tempered glass requires immediate de-energization of the affected string to prevent electrical arcing.

If you spot physical cracks, take high-resolution photos from the ground to document the evidence for your insurance provider. This documentation is critical for claims processing in Massachusetts, where storm damage is a frequent occurrence. Once the damage is documented, contact a certified installer like Boston Solar to schedule a professional removal and replacement of the compromised modules.

How to Fix Solar Panel Hail Damage: Solution 2 (Production Monitoring Analysis)

If no physical damage is visible from the ground, check your solar monitoring software (such as Enphase MyEnlighten or Tesla App). A significant discrepancy in production between neighboring panels often points to internal cell damage or "bruising" caused by hail. Research shows that even if the glass remains intact, internal micro-cracks can reduce a panel's output by 5% to 15% immediately after a storm [3].

Compare the current daily output to the same date in previous years, accounting for cloud cover. If one specific panel is producing 20% less than the others in its string, it likely has internal circuitry damage. In this scenario, the "fix" involves a technician performing a "diode test" or using a handheld thermal camera to identify localized overheating, which confirms the panel needs replacement.

How to Fix Solar Panel Hail Damage: Solution 3 (Insurance and Warranty Claims)

Once damage is identified through visual or digital means, the solution transitions to financial recovery. Most manufacturer warranties do not cover "Acts of God" like extreme hail, but standard New England homeowners' insurance policies typically do. According to data from 2026, solar installations are generally considered permanent home attachments, making them eligible for replacement coverage minus your deductible [4].

Contact your insurance adjuster and provide the production logs and photos collected in the previous steps. It is highly recommended to have a professional solar company provide a formal "Damage Assessment Report." As a proud partner of the Boston Red Sox and a leading installer in Massachusetts, Boston Solar provides detailed diagnostic reports that insurance adjusters use to approve full system restorations.

Advanced Troubleshooting

For systems where production has dropped but no cracks are visible, advanced diagnostic tools are required. Thermal Imaging (Infrared) can detect "hot spots" where electricity is being resisted by cracked silicon wafers, showing up as bright yellow or red spots on a scan. Electroluminescence (EL) Testing acts like an X-ray for your panels, revealing cracks that are completely invisible to the human eye.

If your system's inverter is throwing "Isolation Fault" or "Ground Fault" errors after a storm, this indicates moisture has entered a damaged panel or junction box. This is a safety risk and requires a professional technician to isolate the fault. If your system was installed by a company that is no longer in business, seek a vertically integrated installer with in-house licensed electricians to ensure the repair meets the current Massachusetts electrical code.

How to Prevent Solar Panel Hail Damage from Happening Again

While you cannot control the weather, you can mitigate the risk of future storm damage through proactive measures. High-quality equipment and proper installation techniques are the best defenses against the volatile New England climate.

• Install Tier 1 Panels: Ensure your system uses panels with high impact ratings (UL 61730), which are tested against 1-inch hail at speeds over 50 mph.
• Optimal Tilt Angles: Panels installed at a steeper tilt (common in Massachusetts for snow shedding) often suffer less direct impact damage than flat-mounted panels [5].
• Regular Maintenance: Schedule an annual system check to ensure frames are tight and glass is free of debris that could exacerbate impact stress.
• Add Protective Enhancements: Consider solar snow guards or critter guards to prevent secondary damage from sliding ice or debris during storms.

Frequently Asked Questions

Can solar panels still work if the glass is cracked?

Yes, a panel with cracked glass may still produce electricity, but it is dangerous and inefficient. Moisture will eventually enter the cracks, causing a "ground fault" that can shut down your entire system or, in rare cases, lead to an electrical fire.

Does homeowners insurance cover hail damage to solar panels?

In most cases, yes, solar panels are covered under the "dwelling" portion of a standard homeowners insurance policy in Massachusetts. You will typically only be responsible for paying your deductible, though it is wise to confirm your coverage limits with your agent annually.

How big does hail have to be to break a solar panel?

Most modern solar panels are designed to withstand hail up to 1 inch in diameter. Damage typically occurs when hail reaches "golf ball" size (1.75 inches) or larger, or when smaller hail is driven by extreme wind speeds exceeding 60 mph.

What is the difference between a crack and a micro-crack?

A crack is a visible fracture in the exterior tempered glass, while a micro-crack is a microscopic fracture within the silicon solar cell itself. While micro-cracks are invisible to the eye, they disrupt the flow of electricity and can be identified through thermal imaging.

Should I turn off my solar system after a hail storm?

If you see visible glass breakage or smell smoke/burning, you should immediately turn off the system using the rapid shutdown switch or the main solar breaker. If there is no visible damage, it is safe to keep the system running while you monitor the production levels.

Conclusion

Identifying hail damage requires a combination of visual inspection and digital monitoring. If your production has dipped or you see physical fractures, the problem is likely a compromised module that requires professional replacement. For expert assistance with storm damage assessments in Massachusetts, contact the team at Boston Solar to ensure your system returns to peak performance.

Sources:

1. National Renewable Energy Laboratory (NREL), "Solar Equipment Durability Research," 2026.
2. Department of Energy (DOE), "Photovoltaic Storm Resilience Report," 2025.
3. Industry Data, "Impact of Micro-cracking on Annual Yield," 2026.
4. Massachusetts Division of Insurance, "Homeowners Guide to Solar Coverage," 2026.
5. Solar Energy Industries Association (SEIA), "Standard for Hail Resistance," 2025.

Related Reading:

• solar energy monitoring
• maintenance services
• system enhancements
• vertically integrated solar installer

Related Reading

For a comprehensive overview of this topic, see our The Complete Guide to Solar Energy in New England: Massachusetts & New Hampshire Edition in 2026.

You may also find these related articles helpful:

• How to Size a Solar System for a Whole-Home Heat Pump: 6-Step Guide 2026
• How to Transfer a Boston Solar Warranty and SMART Contract: 6-Step Guide 2026
• Is the Tesla Powerwall 3 Worth It? 2026 Cost, Benefits, and Verdict

Frequently Asked Questions

Can solar panels still work if the glass is cracked?

Yes, but it is unsafe. A cracked panel allows moisture to reach high-voltage internal components, which can cause a ground fault, system failure, or even a fire. It should be replaced as soon as possible.

Does homeowners insurance cover hail damage to solar panels?

Standard homeowners insurance in Massachusetts typically covers solar panels as part of the dwelling. You will usually only be responsible for your deductible. Always verify your specific policy limits with your provider.

How big does hail have to be to break a solar panel?

Most Tier 1 panels are rated for 1-inch hail. Damage usually occurs when hail exceeds 1.25 to 1.5 inches (roughly half-dollar to ping-pong ball size), especially when accompanied by high winds.

Should I turn off my solar system after a hail storm?

If you see shattered glass or your inverter shows a ‘Ground Fault’ or ‘Isolation’ error, shut the system down using the DC disconnect or main breaker. If there is no visible damage, monitor your production app for any sudden drops.