Quick answer
Home charging speed is limited by both the EV charger and the vehicle onboard AC charger. Higher wallbox power is useful only when the electrical supply and car can use it.
What matters most
- Around 7 kW is a common single-phase home charging level.
- 11 kW and 22 kW commonly involve three-phase supply.
- Load management can reduce charging power when the home is using significant electricity.
EV decision framework
Separate charger power, vehicle energy consumption and electricity price. Charger kW determines speed; vehicle kWh/100 km determines energy use; your tariff determines home charging cost.
How to calculate it with SunnyWatly
Use the relevant calculator with your own bill, quote or vehicle information. Defaults are examples only and can become stale as tariffs, rebates and hardware change.
Do not rely on a headline figure alone. Ask what assumptions sit behind the estimate and whether they match your property, tariff and usage pattern.
What can change the result
- Electricity usage and time of day.
- Retail import and feed-in tariffs.
- Roof, shading, inverter or charger constraints.
- Hardware efficiency and usable capacity.
- Network limits and future tariff changes.
Primary public sources used by SunnyWatly