Solar panel maintenance involves keeping your panels clean, monitoring your system’s output and having the wiring and inverter checked periodically by a qualified electrician. Solar PV systems have no moving parts, so they need very little upkeep, but regular servicing helps your panels keep performing efficiently across their 25 to 30 year lifespan. If you want your system inspected by a local team, Excel Electrical offers solar PV installation and servicing across Norfolk and North Suffolk.
As an NICEIC Approved Contractor based near Norwich, we look after solar systems for homes and businesses across the region. This guide explains what solar panel servicing involves, how often it is needed, and the warning signs that your system may need attention.
Do solar panels need maintenance?
Yes, but only a small amount. Solar panels are one of the lowest-maintenance ways to generate energy because they have no moving parts and no consumables to replace.
In the UK, frequent rainfall does much of the cleaning naturally. The three things most likely to reduce your output are a build-up of dirt, shading from new tree growth, and inverter faults, all of which routine servicing is designed to catch early.
How often should solar panels be serviced?
Maintenance frequency depends on your location and how exposed your panels are to dirt and debris. As a general guide for UK systems, the Energy Saving Trust recommends the following schedule:
| How often | What to do |
|---|---|
| Every 12 to 18 months | Clean the panels to clear dust and dirt so they perform efficiently |
| Every 1 to 2 years | Inspect panels for wear, wiring issues or water damage, ideally professionally |
| Every 3 to 5 years | Arrange a full professional service to check for cracks and inverter issues |
Source: Energy Saving Trust, solar panel cleaning and maintenance guidance.
If you live near the coast, under trees or in an area with heavy bird activity, you may need to clean more often. In rainier spots, less frequent cleaning is usually fine.
What does a solar panel service include?
A professional solar PV service goes beyond cleaning the glass. A qualified engineer will typically carry out the following checks:
- Inspecting panels for cracks, discolouration or physical damage
- Checking the inverter is working correctly and showing no fault codes
- Testing wiring, connections and isolators for safety and wear
- Reviewing your system’s output against what it should be generating
- Checking mounting and fixings remain secure
- Identifying shading from new tree growth or nearby obstructions
Because solar PV is an electrical system, this work should be carried out by a qualified electrician. At Excel Electrical, the same engineers who issue electrical testing and inspection certificates handle solar servicing, so your system is checked to recognised safety standards.
How do you clean solar panels safely?
The safest approach for most homes is to rinse panels from ground level using a hose and a soft, extendable brush. Climbing onto a roof carries real risk and is best left to professionals with the right equipment.
A few simple rules help protect your panels and your warranty:
- Do not use a pressure washer, as the high pressure can scratch or damage panels
- Avoid harsh detergents, which may void some manufacturer warranties
- Clean early in the morning or on a cool, overcast day to prevent streaking
- Keep nearby trees pruned and remove moss or ivy creeping towards the panels
How long does a solar inverter last?
The inverter is the component that converts the DC electricity your panels generate into the AC electricity your home or business uses. While solar panels themselves can last 25 to 30 years, the inverter typically needs replacing after 10 to 15 years.
Regular checks help spot inverter problems early, before they cause a total loss of generation. A flashing or solid green light usually means the inverter is working normally, while warning lights or a sharp drop in output can signal a fault worth investigating.
What are the signs your solar system needs attention?
Monitoring your output is the easiest way to catch issues. Contact a qualified electrician if you notice any of the following:
- A noticeable or sudden drop in electricity generation
- Warning lights or error messages on your inverter
- Visible damage, such as cracked glass or loose wiring
- New shading from trees or buildings over part of the day
- Panels that look heavily soiled despite recent rainfall
Why choose Excel Electrical for solar servicing in Norfolk?
Excel Electrical Services is a family-run firm based at Ashwellthorpe near Norwich, trading since 2001 and serving homes and businesses across Norfolk and North Suffolk. We are a NICEIC Approved Contractor, a TrustMark registered company and a Norfolk Trusted Trader.
Our solar-qualified engineers install, test and commission complete PV systems, so they understand exactly how your installation should perform. If you are also considering storing more of your generated energy, you can read about our battery storage solutions, or see our earlier guide to solar panel installation costs in Norfolk.
Is your solar system not performing as it should? Our Norfolk-based engineers can inspect, clean and service your panels to keep them running efficiently; contact Excel Electrical today.
