Start with annual electricity use
Your annual kWh consumption is more useful than simply counting bedrooms. Find it on your electricity statement.
Home›How many solar panels do I need?
HEY SOLAR GUIDEHow many solar panels do I need?
The right array is driven by usable roof space, panel output, annual consumption and what you want the system to achieve.
THE SHORT ANSWER
The right array is driven by usable roof space, panel output, annual consumption and what you want the system to achieve.
Then assess usable roof area
Chimneys, roof windows, edges, shading and access reduce the area available for panels.
Bigger is not always automatically better
Export value, network limits, budget and future electricity demand all influence the sensible system size.
Plan for the future
An EV, heat pump, home working or battery can materially change electricity demand, so tell the designer what may change.
NEXT STEP
Turn research into a property-specific conversation.
Online information can narrow the options. A useful quotation needs the real property, energy use and project requirements.