solar pv

Electricity can be generated directly from sunlight using photovoltaic materials - typically silicon. These systems are commonly called solar photovoltaic or PV. They are reliable and widely installed around the world.

A conventional PV system consists of a PV module that is typically mounted on an existing roof structure. However, new products are now becoming increasingly popular that are integrated into the building like conventional building products such as roof tiles and glass. Building integrated PV replaces conventional building materials with materials that serve the same function put produce electricity as well. BIPV systems are generally more expensive then modular systems but the extra cost can often be offset by the replacement of conventional materials that they replace.

To work effectively, solar PV systems need un-shaded roofs, facing broadly south of due east or west. While orientation and angle of tilt will affect performance somewhat, as will your location, the most critical factor is avoiding shading from trees or chimneys if at all possible.

Commercial systems are predominantly grid-connected which means that you are able to sell any excess electricity that you generate back to the National Grid. Systems can cover an area as small as 10 square meters up to several thousand square meters. How big a system you should opt for is determined by the physical constraints of the building and site and the budget you have available. A basic solar PV system is likely to cost of the order of £5,000 upwards, net of grants (which can be substantial). However, this is a fast-developing technology and prices are coming down all the time. We can provide a tailored estimate and specification for your building.