Solar Panel Maintenance: How to Keep Your System Performing

The Good News

Solar panels require very little maintenance. There are no moving parts, and most quality panels are designed to withstand hail, wind, and extreme heat. But a small amount of attention can keep your system performing at its best.

Regular Checks

Monitor Your Output

• Check your inverter or monitoring app weekly
• Look for sudden drops in generation
• Compare output to similar days in previous months
• Most modern systems send alerts if something goes wrong

Visual Inspection

• Look for visible dirt, bird droppings, or leaf buildup
• Check for cracked or damaged panels after storms
• Ensure no new shading from growing trees
• Inspect roof mounting for any signs of rust or movement

Cleaning Your Panels

When to Clean

• Most panels self-clean with rainfall
• Clean if you notice visible grime or a performance drop
• Dusty or coastal areas may need cleaning 2-4 times per year
• Bird-heavy areas may need more frequent attention

How to Clean Safely

• Use a garden hose from the ground — never pressure wash
• Clean early morning or late afternoon when panels are cool
• Never walk on panels or lean ladders against them
• Use soft brush with extension pole if hosing isn't enough
• Avoid abrasive cleaners or chemicals

Professional Cleaning

• Costs $150-$400 depending on system size and access
• Recommended for multi-storey or hard-to-reach installations
• Some companies offer annual cleaning packages

Inverter Maintenance

• Keep the area around your inverter clear and ventilated
• Check the display for error codes or warning lights
• String inverters typically last 10-15 years before replacement
• Microinverters last 20-25 years (same as panels)
• Budget $1,500-$3,000 for inverter replacement

When to Call a Professional

• Significant drop in output that cleaning doesn't fix
• Error codes on your inverter
• Physical damage to panels after a storm
• Any electrical issues (flickering, tripping breakers)
• Annual health check recommended after warranty period

Warranty Reminders

• Keep your installation paperwork and warranty certificates
• Most panel warranties are 25 years for performance
• Inverter warranties are typically 10-15 years
• Workmanship warranties from installers are usually 5-10 years
• Don't void your warranty by attempting electrical work yourself