Sizing Solar PV
How much solar PV do I need?
The most important factor is the amount of sunny area you can find to site the panels. Thereafter, these rule of thumb figures can be used:
You will need approximately 8 m² for each 1kWp (kiloWatt peak) of array
For well sited grid connected PV arrays - 1kWp will produce ~ 800kWh (units) per year.
Installed cost for PV system is currently approx. £1,200.00 per 1kWp