Solar panels are designed to be low maintenance, but low doesn’t mean no maintenance. Over time, dirt, weather exposure, or technical issues can affect your system’s performance. Knowing when your solar panels need servicing can help you continue generating clean, free energy efficiently all year round. Regular solar maintenance uk is essential to ensure optimal performance.
At Solar Voltaics, we’ve conducted numerous system health checks across the South of England, and we’ve identified a few clear signs homeowners should watch for.
⚙️ 1. Noticeable Drop in Energy Generation
If your inverter app or monitoring system shows a consistent drop in energy generation compared to the same period last year – especially under similar weather conditions – this is your first sign that something may be wrong. A sudden drop might indicate a fault, while a gradual decline could mean your panels are dirty, shaded, or have loose connections that need checking.
Tip: Keep track of your system’s performance each month to make trends easier to spot.
🧹 2. The Panels Look Visibly Dirty or Shaded
Dust, moss, bird droppings, or nearby trees can reduce your panels’ efficiency by 10–20%. In most cases, rain will wash away surface grime — but if you can see a noticeable build-up, a professional clean could be worthwhile.
Avoid pressure washers, as they can damage seals or panel surfaces. Instead, use a soft brush and pure water system, or arrange a safe clean with a professional maintenance company.
⚡ 3. Your Inverter Is Showing an Error or Warning
Your inverter is the heart of your system, converting DC power from your panels into usable AC electricity for your home.
If you notice flashing lights, warning codes, or frequent resets, don’t ignore them — even a small issue could affect system performance or safety.
At Solar Voltaics, our engineers diagnose and resolve inverter issues as part of our annual PV health check, helping you avoid unnecessary downtime.
🔌 4. You’ve Had Electrical Work or Roof Changes
Any time your roof or electrical system is altered — even if unrelated to solar — it’s a good idea to book a quick inspection. Disconnected cables, disturbed isolators, or damaged conduit can all reduce efficiency or create safety concerns.
Our maintenance team checks all electrical connections, isolators, and fuses as standard to ensure your system remains compliant and safe.
📉 5. Your Battery or App Data Doesn’t Match What You’re Using
If you have a solar battery or monitoring app, pay attention to any inconsistencies between your usage and generation data. For example, if your battery appears to charge too slowly or drain too quickly, it might indicate communication issues between your inverter and battery, or an inverter setting that needs recalibration.
🧾 When Should You Service Solar Panels?
Visual Inspection: Once a year
Full Electrical Health Check: Every 2–3 years (or sooner if issues occur)
Panel Cleaning: Only when needed (often every 2–4 years)
An annual service helps ensure your system remains compliant, efficient, and covered under manufacturer warranties.
🔧 Book Your Solar PV Health Check
A quick annual check from Solar Voltaics gives you peace of mind that your system is safe, efficient, and performing at its best.
✅ Full inverter and connection testing
✅ Generation data review
✅ Visual inspection of panels and cabling
✅ Advice on optimising self-consumption
Book your solar PV health check today — or call 02392 006 161 to speak with our friendly team.
Ensuring proper solar maintenance UK can prolong the life of your solar panels and enhance their efficiency.
