Solar panel maintenance: how much does it cost per year?

One of the great solar advantages is how little it needs: no moving parts, no combustion, no water. But 'little' is not 'nothing'. Here's what you'll actually pay per year.

Real annual costs

• Professional cleaning (1×/year): $90-180 for residential
• Annual technical inspection (electrical + structural): $120-220
• Monitoring (free apps or premium): $0-70 per year
• Fuses, occasional small parts: $25-60 per year (estimate)

What does need replacement

The inverter has the shortest life: 10-15 years. Budget $900-1,700 mid-system-life. LiFePO4 batteries last 12-15 years (6,000-10,000 cycles). Panels reach 25-30 years with 0.3-0.5% annual degradation.

What you can do yourself

• Clean with water + telescopic brush (NEVER pressure washer) 2×/year
• Visual check: no leaves, nests or accumulated grime
• Verify the app/monitoring has no active alerts
• Clean the inverter filter (if forced-air model)

What you should NOT do yourself

Don't climb the roof alone, don't touch DC cables (live even with inverter off), don't open the inverter, don't mess with lithium batteries. For anything electrical, call a certified installer.

To understand real durability, read solar panel lifespan, and for cleaning step-by-step, how to clean solar panels.