EV Charger Sizing Calculator

Calculate EV charging time, circuit requirements, and electrical load for Level 1, Level 2, and DC fast charging.

EV battery size. Small: 40kWh, Mid: 60kWh, Large: 75-100kWh.
kWh
State of charge at start of charging.
%
Target state of charge.
%
Level 1: 120V, Level 2: 240V.
V
Level 1: 12A, Level 2: 32-48A.
A
Typical: 85-95%.
%

Results

Charging Power-kW
Energy Needed-kWh
Charging Time-hours
Breaker Size (125%)-A
Approx Range Added-km
References: NEC Article 625; SAE J1772; IEC 61851