Solar panel maintenance is usually straightforward: check panels occasionally for leaves, dirt, bird droppings, cracks or shading from growing branches. Only clean them if it is safe to do so from ground level, using clean water and a soft brush, and avoid climbing onto the roof or using harsh chemicals. Monitor your inverter and electricity bills for unusual drops in generation, and keep vents and equipment clear of obstructions. Arrange a qualified solar technician or licensed electrician to investigate faults, damaged wiring or performance changes.