Solar Panel Installer St Helens (solar for St Helens homes) / Choosing
Looking after your panels
A solar system needs little attention, but the little it needs is worth doing: a monthly look at the output, an eye on anything new casting shade, an occasional clean, and the papers kept together.
Sources read on 3 November 2026. Published by SEO Dons, which runs this St Helens site.
What a healthy month looks like
PVGIS gives a south-facing roof at 35 degrees in central St Helens these average figures for each kW of panels. Multiply by your system size for a rough monthly expectation; your installer's estimate, which includes your own shade factor, is the better yardstick.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30 | 49 | 82 | 110 | 122 | 117 | 116 | 104 | 85 | 57 | 38 | 27 |
PVGIS 5.3, central St Helens, 14% losses. Any one month can be well above or below its average with the weather, so compare a few months together.
New shade
Output that falls steadily over a few years, with no fault showing, is often new shade: a tree growing, a neighbour's extension or dormer, a new building across the street. Measure it and run it through the shade checker. Trimming your own trees is up to you; for a neighbour's, see trees and hedges.
Cleaning
Rain keeps most pitched-roof panels clean. Dirt and moss collect along the lower frame, and more so on shallow roofs. When you can see it, clean from the ground with soft water and a soft brush on an extending pole, or use a firm with proper access. No pressure washers, no detergents the maker does not allow, and no walking on panels.
Birds
Pigeons like the sheltered gap under panels. Mesh clipped round the edge of the array keeps them out and is easiest fitted while the scaffold is up. Wild birds' active nests are protected by law, so if birds have moved in, wait until the nest is empty before clearing it.
Through the seasons
- March and April. Output climbs quickly. Compare it with the same months last year; a shortfall now shows up before the long days.
- May to August. The months that matter most. Look out for birds settling under the panels, and leave any active nest until it is empty.
- September and October. Leaves and moss gather in gutters and along the bottom edge of the panels; have them cleared from the ground or by a firm with proper access.
- November to February. Little to do. Frost and snow clear on their own; do not go up to help them.
After storms or roof work
After a gale, look from the street and the back for anything lifted, loose or lodged against the panels. If a roofer, a chimney sweep or a satellite installer has been on the roof, check the monitoring for a few days afterwards; a cable knocked loose shows as a sudden drop. Report anything to the installer while the workmanship warranty runs.
Insurance and selling
Tell your home insurer the panels are there. If you sell, a buyer's solicitor will ask for the MCS certificate, the network paperwork and the warranties, so keep them together.
The inverter and the paperwork
- Note any warning light or error code on the inverter and report it to the installer while the workmanship warranty runs.
- Plan for an inverter replacement during the panels' life.
- Keep the MCS certificate, the network notification, the electrical certificate, datasheets and warranties together. You need them for export payments, claims and when you sell.
Related pages
References
Questions about upkeep
How do I know if my solar panels are working properly?
Compare each month's output in the monitoring app with the same month last year, and with the expected figures from your installer's estimate. A month well below both, in similar weather, points to a fault, new shade or dirt.
Do solar panels need cleaning in St Helens?
Usually not often: rain clears most dirt from a pitched roof. Clean when grime or bird droppings build up along the bottom edge, from the ground with soft water and a soft brush, or by a firm with proper access.
What if a new extension or tree starts to shade my panels?
Measure it and run it through the shade checker to see how much it matters. If it is a high evergreen hedge, the council may be able to act once you have tried to settle it with the owner; see trees and hedges.
Get a solar quote for your St Helens roof, shade and all
Tell us what you would like a quote for, with your St Helens postcode and what stands to the south of the roof: a stack, the houses opposite or a tree. Your details go to SEO-DONS LTD, publisher of Solar Panel Installer St Helens, and we reply by email.
What happens next
- Send the form: it reaches SEO-DONS LTD, and a full postcode tells us which part of the borough you are in.
- We read it and reply by email, with the figures and sources that apply to you.
- Asking for a quote costs nothing, and whether and with whom you go ahead is your decision.