Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
EV Home-Charging Solar Offset Calculator
Calculate how many kilowatts of extra solar capacity you need to cover your EV's home charging. Useful when sizing a rooftop solar addition for a new or existing electric vehicle.
Extra solar capacity for EV
2.77 kW
2-4 kW (about 5-10 panels) covers a typical commuter. The 2.77 kW example fully offsets 12,000 mi/yr; dropping to 50% offset would halve this to under 1.4 kW.
This is the added solar array size (kW DC) to offset your chosen share of EV charging; a typical residential panel is about 0.4 kW, so divide by ~0.4 to estimate panel count.
Solar Carbon Offset Calculator
Estimates the annual CO2 emissions avoided by your solar PV system, using your yearly production in kWh and the grid emission factor it displaces. Useful for sustainability reports, REC quantification, and household carbon-footprint dashboards.
Key differences
| EV Home-Charging Solar Offset Calculator | Solar Carbon Offset Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 6 | 2 |
| Result | Extra solar capacity for EV (kW) | Annual CO2 Reduction (tonnes) |
| What it does | Calculate how many kilowatts of extra solar capacity you need to cover your EV's home charging. Useful when sizing a rooftop solar addition for a new or existing electric vehicle. | Estimates the annual CO2 emissions avoided by your solar PV system, using your yearly production in kWh and the grid emission factor it displaces. Useful for sustainability reports, REC quantification, and household carbon-footprint dashboards. |