Solar systems need very little maintenance, but a thorough check once a year can prevent small issues from becoming expensive problems. Here's a checklist you can share with your installer or technician.
1. Panels
- Check for cracks, chips or broken glass
- Look for discolouration, burn marks or bubbles
- Check for hot spots (a thermal camera helps)
- Clean thoroughly and check for stubborn stains
2. Mounting structure
- Check for rust, especially at joints and bolts
- Tighten loose bolts and clamps
- Check anchoring and pedestals for cracks
- Ensure the structure is still level and aligned
3. Cables and connectors
- Inspect DC cables for damage, cuts or rodent bites
- Check MC4 connectors for heating, melting or loose fitting
- Ensure cables are secured in conduits and not lying on the roof
- Check cable entry points into buildings for proper sealing
4. Inverter
- Check the display or app for error history
- Clean air vents and heat sinks of dust
- Ensure the inverter area is shaded and ventilated
- Check firmware updates if recommended by the manufacturer
5. ACDB and DCDB
- Inspect for burn marks or a burning smell
- Check fuses, MCBs and surge protection devices
- Ensure boxes are closed and weatherproof
- Tighten terminals where needed (by a qualified technician only)
6. Earthing and lightning protection
- Measure earth resistance values and compare with previous readings
- Check earth pit covers and connections
- Inspect the lightning arrester and its down conductor
7. Generation review
- Compare this year's generation with last year's for the same months
- Investigate any significant drops
8. Batteries (if hybrid or off-grid)
- Check battery health and connections
- For lead-acid batteries, check electrolyte levels and top up with distilled water
- Ensure the battery area is ventilated and clean
9. Roof condition
- Check for any waterproofing damage around structure footings
- Make sure drains are clear
Best time for the annual check
Just before the monsoon is ideal, so the system is ready for storms and heavy rain.
The bottom line
A yearly professional check keeps your solar system safe, efficient and protected — and helps your warranties stay valid.
Our Operation & Maintenance plans include scheduled inspections, cleaning and detailed health reports.
