Photovoltaic (PV) cells are a good example of small-scale renewables. PV modules are panels that convert sunlight into DC electricity, and then into AC electricity. PV modules are reliable and require low maintenance. This technology works well, ideally free from shade, covering electricity needs during the daytime.

PV modules can be mounted on the building, or designed into the building envelope, replacing walling, cladding or roofing. Output can be predicted by checking the available solar energy where the building is located. Specialists can make robust predictions and help an organisation maximise its savings.

If there is enough space for the installation, access to sunlight, and good exposure (i.e. no overshadowing), PVs are a viable and advantageous power option. They are silent and easy to run, they can easily be hidden (or visible, to make a sustainability statement), and they are tried and tested with low associated maintenance costs.

Excess electricity (more than the building/company/house needs) can be exported to the national grid. When this is possible, payback times are shortened, and the best returns are achieved.