One patch of shade costs more than you would think
A suitable roof section does not need sun all day. But one branch at the wrong moment weighs heavier than half a day of shade.
Guides
Expert guides and tips
You only use part of your own solar power
About a third of what you generate you use yourself. That figure changes what a lost percentage of yield actually costs you.
What the storm season does to your panels
An array is a large, flat surface on a sloping roof. That is exactly what wind looks for — and the season for it starts earlier than you think.
After the storm your system yields less: where is it?
Symptom, the four possible causes in order of likelihood, what you can check yourself — and where it stops.
How soiling cuts your solar panel yield
Not every layer of dirt weighs the same: why one splat of bird droppings costs more than a whole dusty panel.
Autumn visit and spring visit: why exactly those two moments?
The cleaning year has two logical markers. Take them both and you enter the best months clean, and come through winter clean too.
Disappointing yield: dirt, shade or a fault?
Your app shows less than last year. How to read from the pattern where to look, without going up on the roof.
Did you know your roof pitch helps determine how fast panels get dirty?
On a steep roof, rain rinses away most of the loose dirt itself: on a flat setup it stays put.
Birds under your solar panels: when is proofing smart?
The space under pitched panels is an ideal nesting spot for a pigeon. Why that hits your yield, and what proofing costs.
Cleaning subscription or separate visits? The worked example
On a yearly contract a visit costs € 65-140 instead of € 75-175 separately. How to work out what that means for your roof.
Osmosis water or tap water: why pros use demineralised water
Tap water dries with limescale stains, and that haze is exactly what you wanted gone. How to do it right.
Warranty and insurance when cleaning solar panels: how it works
Cleaning the wrong way can cost you more than leaving the dirt. Who is liable for what, and what does your warranty say?
What does solar panel cleaning cost in 2026?
All price guides in one place: per panel, per property type and per subscription: plus the 6 factors that drive the price.
When and how often should you have your solar panels cleaned?
The right timing gets the most out of the sunniest months: the maintenance calendar for your panels.
Clean your solar panels yourself or have it done? Decision guide
At ground level you can safely do it yourself: on the roof it becomes a different story. How to weigh it up.
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