UK Home Solar & Battery
Solar Generation
Estimator
See how much electricity your solar panels can generate each month — based on your system size, location, and roof characteristics.
Your System
Your installed or planned solar panel system size.
Solar system size
?
Typical UK home system: 3–5 kWp
kWp
Location & Roof
These factors affect how much energy your panels generate across the year.
Region
?
Annual peak sun hours vary by location
Roof orientation
?
Direction your roof faces
Roof pitch
?
Angle of your roof slope
Shading
?
Shading from trees, buildings, or chimneys
Your Results
Estimated Annual Generation
— kWh
—
Best month
—
—
Worst month
—
—
Summer / Winter ratio
—
peak vs off-peak quarter
Estimated generation by month (kWh)
Monthly breakdown
| Month | kWh | Daily avg | Share of year |
|---|
Estimates use monthly irradiance distribution factors derived from UK Met Office and PVGIS datasets, a performance ratio of 0.85, and regional annual irradiance figures. Actual generation varies with weather, panel degradation, inverter efficiency, and shading. Consult a qualified MCS-accredited installer for a site-specific assessment.