Solar PV sizing
Calculate what solar array size (kWp) and panel count you need to cover a chosen share of your annual electricity consumption.
Open calculatorSolar PV yield
Annual energy output is array capacity in kWp multiplied by a typical regional specific yield and adjusted for roof tilt and azimuth. You can split the array across two roof planes (e.g. East–West). Regional presets represent multi-year planning averages for an unshaded south-facing roof at 30–35° tilt, already expressed as AC output after ~80% system performance ratio.
Installed DC nameplate capacity in kilowatts peak — number of modules multiplied by wattage per module.
kWp
kWh/kWp
Estimated percentage of annual energy lost to trees, chimneys or neighbouring buildings (enter 0 for an unshaded roof).
%
Estimated annual output
9,306 kWh
Average monthly output
776 kWh
Effective yield at this orientation
931 kWh/kWp
The link may contain your inputs. Anyone receiving it can read them.
Central European planning averages. Snow cover, local shading, inverter clipping and battery round-trip losses will affect actual meter readings.
Solar PV journey
Annual generation is not the surplus exported to the grid. Enter meter imports and exports yourself in the next calculator. System settings stay local for payback.
Recent on this calculator
Full historyStored strictly in this browser’s local storage. Clicking an entry reloads the parameters into the calculator URL; sharing the link exposes those inputs to the recipient.
No saved calculations yet. Use any calculator and your recent results will appear here.
Educational estimate only. Not medical, tax, legal or financial advice.