Solar PV Panels
We now stock a small range of solar photovoltaic panels. These are polycrystalline panels made from wafers of silicon laminated between an impact-resistant transparent cover and an EVA rear mounting plate.
They are constructed with a lightweight anodised aluminium frame which is predrilled for linking to other frames/roof mounting structure, and contain a waterproof electrical terminal box on the rear.
Calculating the Energy Yield
In order to calculate the expected yield from these panels, it is assumed that the UK receives on average (bad days and good days) around 4-5hours peak sun hours during the summer and 1 hour of peak sun hours in the winter. In terms of roof area, 1m2 will generally equate to approximately 140watts of solar PV panel For an array of 1kWp, you would expect to produce around 750kWh of electricity per year, if sited on a suitable south-facing location. Solar yields will vary across the country, and you can expect significantly more solar power from Devon and Cornwall by comparison to Scotland.
Download our PV Panel Information Brochure [Opens a new window]
Panel Dimensions
5W panel (polycrystalline) 29cm x 24cm
20W panel (polycrystalline) 54cm x 42cm
60W panel (polycrystalline) 117cm x 54cm
Roof Mounting Clearance
Panels mounted on a roof should have at least 3 inches, and preferably 4 to 6 inches, clearance between the bottom of the panel frame and the roof.
This allows for air flow under the panels for cooling. Panels should never be mounted so there is no air flow under them, as they can reach very high temperatures that way.