What Size Solar System Do I Need for My Home?
The best first estimate comes from your monthly kWh usage, not your country alone. A smaller home with electric heating or EV charging can need more solar than a larger efficient home.
Simple path: monthly kWh -> daily kWh -> local sun hours -> system size in kW -> panel count and roof fit.
Global Inputs
- Monthly electricity usage from your bill.
- Local sun hours and seasonal weather.
- Panel wattage and roof orientation.
- Battery backup, EV charging, or heat pump loads.
Best Next Step
Use Panel Count for sizing and Savings for bill impact.
Next step: turn your bill into a system size estimate.