How to protect home solar panels from damage during severe weather events?

Proactive steps can help shield your solar investment from hail, wind, and debris. This guide covers practical preparation and post-storm inspection protocols.

Understanding the Risks to Solar Panels

Solar panels are designed to be durable, with most modern modules tested to withstand hail up to one inch in diameter and wind loads exceeding 140 miles per hour. However, severe weather events like hurricanes, tornadoes, derechos, and major hailstorms present unique challenges. The primary risks are not typically to the tempered glass of the panels themselves, but to the mounting system, electrical connections, and the potential for impact from wind-borne debris. Protecting your system involves a combination of proper initial installation, routine maintenance, and specific storm preparations.

Pre-Installation: The Foundation of Protection

The best defense against severe weather begins before the panels are ever mounted on your roof.

Choose a Qualified Installer: Vet your solar installer thoroughly. A reputable contractor will ensure your system is permitted and installed in strict compliance with local building codes, which dictate wind and seismic load requirements. They should use mounting hardware and racking systems rated for your specific climate's weather risks.
Discuss Panel Quality: Inquire about the panels' hail and wind ratings. Manufacturers provide these specifications, and opting for panels with higher durability ratings can be a wise investment in storm-prone regions.
Assess Your Roof: A solar array is only as strong as the roof it's attached to. Have a professional roofer inspect your roof's condition before installation. Installing panels on an aging or compromised roof structure increases risk during high-wind events.

Proactive Measures Before a Storm

When severe weather is forecast, taking these steps can minimize potential damage.

Secure Loose Items: Walk your property and secure or store any outdoor furniture, decorations, or tools that could become airborne and strike your panels.
Trim Surrounding Trees: As part of regular seasonal maintenance, keep tree branches trimmed back from your roof. This prevents limbs from breaking off and falling onto your array during high winds or heavy snow.
Review Your Monitoring System: Familiarize yourself with your solar system's performance monitoring software. A functioning monitor will help you quickly identify a loss of production after a storm, indicating potential damage.
Document Your System: Keep a file with photos of your installation, model numbers, and your installer's contact information. This will be invaluable for insurance claims if damage occurs.

Post-Storm Inspection and Safety

After the weather has passed and it is safe to do so, follow these guidelines.

Visual Inspection from the Ground: Use binoculars to look for obvious signs of damage such as cracked glass, displaced panels, or debris on the array. Do not climb onto a wet or damaged roof.
Check System Performance: Log into your monitoring app or check your inverter display. A complete loss of output or a significant, unexplained drop could indicate electrical damage or disconnected wiring.
Contact a Professional for Assessment: If you suspect any damage, contact your original installer or a licensed solar technician. They have the training and equipment to safely conduct a detailed inspection of the mechanical and electrical components.
Contact Your Insurance Provider: If damage is confirmed, contact your homeowner's insurance company promptly. Most standard policies cover solar panels, but you should understand your coverage details before a loss occurs.

What Not to Do

Avoid actions that could void warranties, cause injury, or create further damage.

Do not attempt to cover panels with tarps or blankets before a storm, as this can create wind-catching sails and cause more harm.
Do not spray panels with water in freezing temperatures before a storm, as this can create a layer of ice.
Do not walk on the panels or attempt DIY electrical repairs after a storm.

A resilient solar installation starts with quality components and expert installation. By incorporating these protective considerations into your maintenance routine and storm preparedness plan, you can significantly reduce the risk of weather-related damage and ensure your system continues to provide clean energy for years to come. Always consult with local solar professionals, as building codes and best practices can vary by region and climate.