What Happens If Solar Panels Are Damaged by Hail

Understanding What Hail Does to Solar Panels

Hail can cause a range of physical injuries to photovoltaic modules. According to Solar Panel FAQ, hail impact can crack tempered glass, bruise or chip the surface, and, in severe cases, fracture the encapsulant or backsheet that holds the cells in place. While most residential panels are designed to withstand weather, a sizable hail event can compromise the protective layer, alter electrical pathways, and create micro-cracks that may not be visible from the ground. Micro-cracks can propagate under thermal cycling and sun exposure, potentially reducing output over time. A dented frame or loosened mounting hardware can also affect alignment and roof seals, which may lead to water intrusion if not addressed. In many cases the system continues to produce electricity after hail, but performance will vary with the severity and location of damage. Your installer or a licensed solar technician is best positioned to assess safety, structural integrity, and whether repair or replacement is needed. For homeowners, this means prioritizing a professional inspection before making decisions about repairs or warranty claims.

How to Inspect After a Hail Event

Start with safety and documentation. Do not climb onto a wet roof unless you are trained; use binoculars from the ground or hire a licensed roofer to inspect. Look for visible signs: spiderweb cracks on glass, chips at the edges, dents along the frame, or misalignment of mounting hardware. Photograph all damage from multiple angles and note the time since the storm. If you have a ground mounted array, you can often spot rough damage from ground level, but still schedule a professional inspection to check wiring and connections. A technician can perform electrical tests and infrared imaging to identify hidden damage and verify system performance against expected output. Keep records of weather data and the storm’s date for warranty or insurance purposes.

Visible vs Hidden Damage and Diagnostics

Not all damage is visible to the naked eye. Micro-cracks may appear as faint lines but can expand under thermal stress. Hidden damage to the encapsulant, busbars, or interconnections may cause hot spots or faster aging. A professional assessment commonly includes infrared thermography to detect abnormal heat patterns and a performance check comparing actual production to expected output under the same conditions. Early detection helps prevent larger problems and ensures the system operates safely.

Impact on Performance and Safety

Damage can reduce energy production and efficiency, especially if cracks extend through the glass or allow moisture to reach the encapsulant. Micro-cracks can create resistance changes and hot spots, risking long term degradation. There is also a safety dimension: damaged panels or wiring may present electrical hazards if moisture enters components. If you notice a dramatic drop in production after a hail event, schedule an inspection promptly to confirm safety and plan repairs.

Warranty and Insurance Considerations

Warranty coverage for hail damage varies by manufacturer and model. Some manufacturers cover hail damage under the standard warranty if the damage is caused by hail and not due to installation defects; others may limit coverage or require that the damage occurred under normal operating conditions. Homeowners insurance may provide coverage for hail damage to the solar array, depending on your policy and deductibles. Always review your contract terms and work with your installer to document the event for warranty or claim purposes. If you are pursuing a claim, gather photos, inspections, and any written assessments to support your case. The overall advice is to understand both warranty language and your insurer policy before filing a claim.

Repair or Replacement: Making the Decision

Repair options for PV modules are limited; many technicians recommend replacing damaged panels when the damage is structural or when micro-cracks significantly impact performance. In some cases, a damaged module can be replaced individually if the system uses modular strings and the parts are under warranty; otherwise, the entire string or array may need to be replaced. Safety and long term performance dominate the decision; even when replacement is possible, ensure compatibility with your existing inverter, racking, and monitoring system. Consult your installer about compatibility and expected downtime.

Protecting Your System from Future Hail

To reduce risk, choose modules with higher hail resistance and ensure secure mounting to minimize movement. Proper tilt and orientation help shed hail and water, while routine maintenance keeps seals intact. Consider professional hail mitigation options if you live in frequent hail zones, and ensure your roof and racking system are in good condition after a storm. Regular post storm inspections help catch issues early.

Quick Homeowner Checklist After a Storm

• Document the event and damage with clear photos from multiple angles.
• Note date, time, and storm severity for insurance or warranty claims.
• Schedule a professional inspection if damage is suspected or if performance drops.
• Review warranty terms and contact your installer or insurer for guidance.
• Do not attempt to repair glass or electrical components yourself.
• Monitor system performance and plan a follow up test after repairs.