Solar panel cleaning in spring or autumn: what is the best timing?

For most systems, spring is the best time to clean solar panels.

After winter, dust, moss particles, soot and bird droppings often remain on the glass.

A second clean after summer is useful near trees, farms, pigeons or low-pitched panels.

Never clean in the heat of the day. Professionals work early or in cloudy conditions.

Compare production with the same period last year to spot dirt-related losses.