Home EV charging planner

Explore daily energy and parking time with explicit assumptions. Initial values are hypothetical. Inputs stay in this browser; nothing is submitted. This planner does not select a safe charging setting, breaker, wire, or panel size.

Your planning assumptions

Daily miles to replace

Energy per mile (kWh)

What does the energy figure measure?If a label or app figure already includes wall-energy losses, select supply energy to avoid adding losses twice.

Assumed efficiency (%)90% is an example, not a tested rate.

Assumed voltage

Assumed charging currentCharging amps, not breaker sizes. Availability must be confirmed.

Vehicle AC limit (kW)Use exact vehicle AC capability, not DC fast charging.

Usable parking hours

Variable electricity rate ($/kWh)Example rate. Check the added-energy charges on your tariff.

Illustrative result

Supply energy for one day —

Assumed usable AC power —

Idealized replenishment time —

30 identical days: energy-only cost —

Actual managed charging can allocate less power. Weather, vehicle behavior, schedules, and other conditions can change replenishment time. The result describes daily energy, not a full-battery charge or an approved installation.

Calculation: miles × stated kWh/mile; divide by efficiency only for battery-energy input. Usable power is the lower of voltage × charging amps ÷ 1,000 and the vehicle AC limit. Time equals supply kWh ÷ usable kW. Costs exclude fixed bill charges and assume the entered rate applies to all added energy. Calculations use full precision; display values are rounded.