Solar panel maintenance: what you actually need to do

One of the best things about solar is how little it asks of you. There are no moving parts, so day to day it asks very little of you. But ‘low maintenance’ isn’t quite ‘no maintenance’ — a few simple habits keep your system producing at its best.

Keep an eye on your monitoring

The most valuable thing you can do costs nothing: check your system’s monitoring now and then. A solar system fails silently, so monitoring is how you catch a problem early instead of discovering it months later on a high power bill. If production suddenly drops, that’s your cue to look into it.

Don’t rely on the rain to clean your panels

Here’s our honest take — and it’s a genuinely debated topic in the industry: you wouldn’t leave the rain to wash your car or your windows, and panels are no different. Rain rinses off loose dust, but it doesn’t shift the baked-on grime, lichen, salt and pollen that quietly cost you output. In fact, many panel manufacturers specify regular cleaning — often annually — as a condition of their performance warranty. Our advice is simple: give the panels a proper clean about once a year. Never climb onto the roof to do it yourself, though — a soft brush and water from the ground, or a professional, is the safe way.

Watch for shading over time

Trees grow. A branch that was fine at install can start shading panels a few years later, quietly costing you output. A quick look each year — is anything new casting a shadow? — is worth doing.

An annual check pays for itself

Once a year, have a qualified person give the system a proper check — the connections, isolators and inverter — especially as it ages. It’s low cost for high return: cheap insurance on a system that’s meant to produce for 25-plus years. And if your system isn’t producing what it used to, don’t just live with it — it’s usually a fixable fault.