Tool 12 · Charger

EV home charger time — Level 1 vs Level 2

Estimate charging hours from battery size, start and target charge, charger power and charging losses. Good for deciding whether a Level 2 outlet is worth it.

Inputsbattery + kW

Outputhours + miles

Privacy100% client-side

Charging cost Solar for EV

Battery size (kWh) Start charge (%) Target charge (%) Charger power EV efficiency (kWh per 100 miles)

Why charger time is not just battery ÷ outlet

Charging losses: the model assumes about 90% wall-to-battery efficiency. Cold weather and battery conditioning can make real sessions slower.
Daily reality: most homes do not charge 0–100%. Overnight recovery from 20% to 80%, or daily miles recovered, is the useful number.
Solar connection: if you want the energy itself covered by panels, use the solar for EV charging calculator.