Solar PV Panels
Photovoltaic (PV) panels convert sunlight into electricity. Installing solar PV on an extension roof (facing south, at 30–40 degrees pitch) can generate a significant proportion of a home's electricity. Panels are typically 400–450W each; a 4 kWp system requires around 10 panels. Solar PV installation is typically permitted development on dwellings. Excess electricity can be sold back to the grid via the Smart Export Guarantee (SEG).