How PV Works
PV modules contain photovoltaic cells - semiconductor devices that convert sunlight directly into electricity. Most PV systems installed in the UK are grid connected, which means that the output is fed directly into (and synchronised with) a building’s existing mains supply. On a sunny day, the power generated by the PV system reduces the amount of electricity that needs to be purchased from the electricity company. On very sunny days, or at times when not many loads are turned on, electricity production may be greater than the demand in the building, and the excess will be exported out into the grid.
The system consists of three elements:
- an array of PV modules
- an inverter (an electronic device that converts the output of the solar array into AC mains)
- cables, display and switchgear
Maintenance:
PV systems are reliable and have no moving parts and the majority of systems are self cleaning. There is no need for any regular planned maintenance.
Lifetime and Guarantees:
PV modules typically carry a 25 year performance warranty and have a life expectancy of around 50 years. Inverters all come with a five year warranty. All other parts and the system as a whole are covered by the Sundog Energy standard two year warranty.
