Solar panels will gradually gather a build up of grime that will decrease the amount of sunlight getting to the panels. Solar panel manufacturers state that your keeping your panels clean can improve efficiency by as much as 20%. It is important to be sure any cleaning fluids or materials are non-abrasive and suitable for the task, therefore will not damage the panels or leave a residue that can also hamper their efficiency.
In the majority of cases solar panels are attached using roof clamps. Cornwall is Zone 4 on windloads. Although we use the highest quality mounting kits over time they can become corroded, deteriorate and break, especially installs near the coast. It is worth once every few years having the clamps checked and if they have corroded then to have them replaced. It is also prudent to have the accessible roof hooks checked (the roof hooks on the outside of the array) to see if they have had any deterioration, if so then these will also need replacing.
Unless you can safely reach the panels yourself, you may wish to have your cleaned and maintained by a professional. Harvest Cornwall do offer cleaning services and safety checks.
Please contact us to discuss your system so we can give you an upfront cost for your servicing your solar panels.