The Short Answer
Solar panels are one of the lowest-maintenance home improvements you can make. There are no moving parts, nothing to replace, and modern panels are built to last 25-30 years with minimal attention.
That said, a small amount of care can make a noticeable difference to your output - and your savings.
Cleaning Your Panels
Rain does a decent job of keeping panels clean in the UK, but it won't remove everything. Bird droppings, tree sap, and general grime can reduce output by 5-10% if left unchecked.
Here's what we recommend:
- Check panels twice a year - spring and autumn are ideal
- Use a soft brush or sponge with clean water
- Never use abrasive cleaners or pressure washers
- Clean early morning or late evening when panels are cool - cold water on hot panels can cause micro-cracks
If your panels are on a high or steep roof, don't risk climbing up yourself. A professional clean costs around £50-100 and is far cheaper than an A&E visit.
Monitoring Performance
Most modern inverters come with an app that shows your daily and monthly generation. Get into the habit of checking it occasionally. A sudden drop in output usually means one of three things:
- Panels need cleaning - the most common cause
- Shading has changed - a tree may have grown or a new structure built nearby
- Inverter fault - rare, but inverters typically last 10-15 years and may need replacing once during the panel lifespan
If you notice a consistent drop that cleaning doesn't fix, it's worth getting a professional inspection.
Inverter and Wiring Checks
Your installer should have set up your system with all the necessary safety features, but it's worth having a professional inspection every 5 years or so. This covers:
- Inverter performance and error logs
- Wiring and connection integrity
- Mounting bracket condition
- Panel surface inspection for damage
What You Don't Need to Worry About
- Snow: Light snow slides off angled panels quickly. Heavy snow can be gently brushed off but will melt on its own
- Hail: Modern panels are tested to withstand 25mm hailstones at 80km/h
- Wind: Properly installed panels are rated for winds up to 140mph
Need Help With Your System?
If your solar panels aren't performing as expected, or you'd like a professional inspection, get in touch with our team. We service systems across Wirral, Liverpool, Chester, and the wider North West.