'It is important to follow the manufacturer's guidelines for cleaning and maintenance, so always follow this,' advises George Frost, UK Country Manager at iChoosr.
While some experts, such as Kat, explain that 'solar panels are designed to withstand the elements,' so you may not need to switch off the system. Others err on the side of caution. James recommends switching off your solar panels 'before cleaning them, otherwise, there is a risk of electrocution as well as potentially causing damage to your panels.'