AC charging planner

Plan constant-power AC charging: usable capacity × (target−start)/100 for a session, or distance × consumption/100 for replenishing a drive. Consumption is battery-side, excluding charging losses, for example from the trip computer. If it already includes grid/charging losses, do not add them again. Daily driving is an energy balance, not a range or battery-capacity check.

Enter mains-side power directly, or calculate AC power: single phase U×I×PF/1000; balanced three phase √3×U×I×PF/1000 kW. Three-phase voltage is line-to-line; current is per phase. Select phases actually used by the vehicle. PF is total power factor including distortion; 1 is an example. Voltage is freely entered, without regional assumptions.

Optional vehicle AC limit is also mains-side, before losses; blank applies no extra limit. Used power = min(offered power, limit). Efficiency η is the fraction of mains energy stored usefully in the battery. Battery power = mains power×η; mains energy = battery energy/η; time = mains energy/mains power. 90% is an editable example, not a measured vehicle value.

Optional window: required average mains power = mains energy/hours. Fit assumes constant power and the same efficiency. Energy cost = mains energy×price/kWh; no subscription, parking or idle fees. Blank price hides cost; zero is free. No realistic DC curve, balancing, temperature/SoC taper, pauses or detailed load management. No cable/breaker sizing from current alone.

Results update as you edit. Battery and grid energy bars share a scale. From one minute, the charging time is rounded to hours and minutes. The tooltip shows decimal hours, and the window comparison uses the unrounded value. An invalid price or window hides only its own result. The browser keeps your inputs. Reset restores the examples. US DOE AFDC explains battery, state of charge, onboard charger and charging power; ADAC measurements explain varying losses. No specific vehicle values or installation rules adopted as defaults.