04/02/2018
Anonymous
Yelm, WA
I'm on my 4th year with these Itek solar panels and can't notice any reduction in output. The physical condition appears to be holding up well also. No corrosion or any other obvious issues. Since mine are installed at ground level, I just wait for a rainstorm and go out with a brush on the end of an extension pole to clean them once or twice a year. The panels look and perform good as new still.