Does anyone wash their PV solar panels?
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mmmmikey
Posts: 1,644 Forumite
Hi, just moved to a house with solar panels and having fun playing with energy monitors. Quick questions - does anyone wash their panels? How, DIY, window cleaner or professional service? Is it worthwhile?
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Hi mmmmikey
Yes every year in march with rain water.
If you use tap water the chemicals will leave stains and marks on the panels. also be careful that you use something that is not abrasive.
most of the time the rain will keep them clean.
But if you have trees or a lot of bird poo it is worth taking a look now and again to see if you have a problem.
regards
gefnew0 -
There have been several threads on this over the years, with mixed opinions.
As I understand the Rent a Roof firms don't routinely wash panels, it is probably not required for the majority of cases.0 -
It will depend on the pitch of the roof. Ours are at 45 degrees which is fine but I have read somewhere that below maybe 30 or 35 degrees rain alone won't keep them clean.0
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It will depend on the pitch of the roof. Ours are at 45 degrees which is fine but I have read somewhere that below maybe 30 or 35 degrees rain alone won't keep them clean.
Mine are at 20d and 30d pitches, I give them a quick clean with an extendy pole thingy every 2 or 3 years, but it doesn't seem to make much difference.
The advice from the Energy Saving Trust is:Solar PV needs little maintenance – you'll just need to keep the panels relatively clean and make sure trees don't begin to overshadow them. In the UK panels that are tilted at 15° or more have the benefit of being cleaned by rainfall to ensure optimal performance. Debris is more likely to accumulate if you have ground mounted panels.Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW). Two A2A units for cleaner heating.
For general PV advice please see the PV FAQ thread on the Green & Ethical Board.0 -
At 17.5 deg slope, our panels are probably shallower than most but still seem to stay reasonably free of dust etc.
I have occasionally hosed them off (I can get to the roof fairly easily and because it's so shallow can stand on it OK) but have never noticed a huge increase after doing so.NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq50 -
Do panels have a non-stick coating?0
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coffeehound wrote: »Do panels have a non-stick coating?
Dave FSolar PV System 1: 2.96kWp South+8 degrees. Roof 38 degrees. 'Normal' system
Solar PV System 2: 3.00kWp South-4 degrees. Roof 28 degrees. SolarEdge system
EV car, PodPoint charger
Lux LXP 3600 ACS + 6 x 2.4kWh Aoboet LFP 2400 battery storage. Installed Feb 2021
Location: Bedfordshire0 -
Dave_Fowler wrote: »When I had an optimiser fail earlier this year I cleaned two of the panels so that I could compare the outputs between these two and the remaining 10. (It's a SolarEdge system with individual panel monitoring). Surprisingly there is no measurable difference between the cleaned and the dirty panels - less than the manufacturing variations between panels.
Dave F
Cheers, that's good to know as I'd have wrongly thought small difference but noticeable (just). Guess I'll stick with a quick 3 yearly wash ..... if I can be bothered.Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW). Two A2A units for cleaner heating.
For general PV advice please see the PV FAQ thread on the Green & Ethical Board.0 -
Thanks all, a useful cross section of replies - I expect this has been covered before but my forum searching skills weren't up to finding this info0
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That's a good question
Generally, they clean themselves with the rain ...0
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