Powering Queensland Homes & Businesses for Over 25 Years

For most South East Queensland homes, cleaning once or twice a year is enough to keep output where it should be. If you're near the coast, in a dusty area, or have lots of nearby trees, more frequent cleaning helps. Rain does some of the work but won't shift bird droppings, pollen, or compacted grime — which can reduce output by 5 to 15 percent if left unchecked. Check out our cleaning service.(/solar-panel-maintenance/solar-panel-cleaning)

Yes, if you have safe roof access. Use a soft brush or non-abrasive cloth with clean water. Avoid high-pressure hoses as they can damage panel seals and void manufacturer warranties. If your roof is steep or the panels are difficult to reach, a professional clean is safer and more thorough.

The easiest way is to check your inverter display or monitoring app and compare daily output to your expected generation. A sudden drop in production, an error code on the inverter, or a flat reading on a sunny day are all signs something needs attention. Most modern inverters will alert you automatically if there's a fault.

Thorough solar panel maintenance (https://www.djedwardselectrical.com.au/solar-panel-maintenance)every two years is recommended for most residential systems. An inspection checks panel condition, wiring and connections, inverter performance, and mounting integrity. It's the best way to protect your investment and catch issues before they become expensive repairs.

Most string inverters last 10 to 15 years. Microinverters and hybrid inverters typically last longer. Your inverter is the component most likely to need replacing before your panels do, so it's worth keeping an eye on its performance and budgeting for a replacement around the 10-year mark.

All solar panels degrade slightly each year — typically 0.5 to 0.8 percent annually. This is normal and accounted for in the manufacturer's performance warranty. Outside of natural degradation, the most common causes of reduced output are dirt buildup, shading from trees or new structures, and physical damage to panels or connections.

Rain helps, but it's not enough on its own. Light rain can actually leave a muddy residue as dust mixes with water and dries on the panel surface. A manual clean at least once a year ensures panels are performing at their best and isn't something you want to skip entirely.

After hail, strong winds, or heavy storms, do a visual check of your panels from ground level if it's safe to do so. Look for cracked or chipped glass and check your inverter for error codes. If anything looks off, book a solar report inspection (https://www.djedwardselectrical.com.au/solar-panel-maintenance/solar-reports)before your next billing cycle — catching damage early prevents further deterioration.

A professional solar clean for a standard residential system usually costs between $150 and $300. A full inspection typically ranges from $200 to $400 depending on system size. These are small costs compared to the output gains they deliver and the protection they provide for a $5,000 to $10,000 investment.

The most common causes are dirty panels, partial shading, a degrading inverter, or a faulty panel or connection. Start by cleaning your panels and checking your inverter. If production doesn't recover, a professional inspection will pinpoint whether the issue is with individual panels, the wiring, or the inverter itself.