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How to clean solar panels?

nwdiver

Well-Known Member
Feb 17, 2013
8,856
12,941
United States
How is everyone cleaning the panels and how often? Couldn’t find much online. Got mix opinions on using soap. Ended up just using glass cleaner today.

I've found that it's generally not worth my time to clean the panels. Any performance increase from cleaning is short lived and the loss of production tapers quickly. The panels can only get so dirty...
 

jjrandorin

Moderator, Model 3, Tesla Energy Forums
Moderator
Nov 28, 2018
14,248
17,986
Riverside Co. CA
I get mine cleaned, in general, once a year, when I get my windows cleaned (same company does both for me). For me, its basically a wash (the amount I pay for cleaning doesnt quite balance out the value of the increased solar production), but its close enough to not bother me too much and I like seeing the slightly increased production.
 
It wasn’t that bad for me. Roof is easily accessible with a ladder and it’s a one level house. I just used a window cleaner chemical similar to windex. Took about 20mins. The solar panels were a bit dusty. I could see it from the ground level.

I’m just not sure what the proper cleaning chemical is to use for solar panels.
 

jjrandorin

Moderator, Model 3, Tesla Energy Forums
Moderator
Nov 28, 2018
14,248
17,986
Riverside Co. CA
It wasn’t that bad for me. Roof is easily accessible with a ladder and it’s a one level house. I just used a window cleaner chemical similar to windex. Took about 20mins. The solar panels were a bit dusty. I could see it from the ground level.

I’m just not sure what the proper cleaning chemical is to use for solar panels.

My window cleaning person just uses deionized water and a brush (no chemicals). My home is two stories, with a cement tile roof. I am not going up there, lol.
 

dhrivnak

Active Member
Jan 8, 2011
4,576
4,053
NE Tennessee
How is everyone cleaning the panels and how often? Couldn’t find much online. Got mix opinions on using soap. Ended up just using glass cleaner today.
In TN we get enough rain that there is no need to clean them. After 7 years, when cleaning some skylights, I did a good job of cleaning my panels. When I then compared against another solar install I found out that after cleaning my system did slightly less. I am sure it is just random error, but bottom line no gain for the time spent.
 

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