What proportion of electricity will a PV system produce?
All buildings consume vastly differing amounts of electricity. An example is given here for a household. Electricity bills will be lower because often electricity from the PV system will be used instead of taking electricity from the mains. A typical UK three-bedroom family home built to 2006 Building Regulations uses 3,000-4,000kWh of electricity per year. A typical 2 kWp PV system would provide almost 50% of electricity needs i.e. 1,600 kWh. This can vary considerably dependent on electricity consumption and how energy efficient the electrical appliances in a house are. It is possible for a 2 kWp PV system to supply all electricity needs if all possible energy saving measures are implemented.
