Solar Panel Maintenance: What You Need to Know

Very little. Solar panels have no moving parts and are designed to withstand decades of British weather. Most systems will perform reliably for 25–30 years with minimal intervention.

That said, a small amount of care ensures you get the maximum output from your investment. Here is what we recommend.

Rain does a reasonable job of keeping panels clean in the UK, but dirt, bird droppings, pollen, and algae can accumulate over time, reducing output by 5–15%.

Recommended frequency: Once or twice a year, ideally in spring and autumn.

DIY cleaning: Use a soft brush or sponge with warm water. Never use abrasive materials, pressure washers, or harsh chemicals. Clean from the ground with an extendable brush if possible — do not walk on panels.

Professional cleaning: Costs £100–£200 and is worthwhile if your panels are difficult to access or heavily soiled.

Most modern inverters and battery systems provide app-based monitoring that shows your daily, monthly, and annual generation. We set this up during installation.

Keep an eye on your monthly generation figures. A sudden drop (not explained by weather) could indicate a fault with a panel, inverter, or connection. If you notice anything unusual, contact us and we will investigate.

Your solar installation includes multiple warranties:

• Panel product warranty: 12–25 years (covers manufacturing defects). • Panel performance warranty: 25–30 years (guarantees at least 80–90% of rated output). • Inverter warranty: 10–15 years (Sigenergy and EcoFlow both offer extended warranties). • Workmanship warranty: Our IWA-backed workmanship guarantee covers the installation itself.

If anything goes wrong, these warranties have you covered. Keep your MCS certificate and warranty documents safe — we also store digital copies for you.