When to Clean Your Solar Panels?
The frequency needed for cleaning your panels will vary by location and season. If the weather is dusty, you are likely to need to clean your solar array more often.
If it is winter, it might need snow or ice brushed off it. In many cases, frozen moisture is a self-correcting problem. As soon as the sun hits the collectors, a thin layer of ice will melt right off.
Deep snow is another matter. Sometimes it will need to be brushed away, preferably before it can develop a hard crust.
Clean the panels at a time when they are not extremely hot. Coldwater applied to hot glass can easily cause the panels to break or for a seal to come loose.
Early morning or late afternoons after the panels have had a chance to cool down is a good time for cleaning.