Tools

EV Home Charging Time & Cost Comparator (Level 1 vs Level 2)

Level 1 uses a standard wall outlet; Level 2 needs a dedicated circuit and an install. Enter your driving to see whether the outlet is enough — or how much time Level 2 buys back.

Your driving & home setup

Most EVs: 3.0–4.0 mi/kWh. Cold weather lowers it — see the winter-range article below.

Standard 120V outlet, typically ~1.4 kW.

AC-to-DC conversion plus battery-management overhead; Level 1 typically ~85%.

Level 2 typically ~92% — shorter sessions mean less overhead energy.

VerdictLevel 1 is enough for your daily drivingDaily Level 1 charging (8.2 h) fits inside your 10.0 overnight hours.
Daily charging time — Level 18.2 hFull 0–100% charge: 50.0 h
Daily charging time — Level 21.5 hFull 0–100% charge: 9.1 h
Energy used per day11.4 kWh343 kWh per month
Monthly charging cost — Level 1$68.57Metered energy includes charging losses at 85% efficiency.
Monthly charging cost — Level 2$63.35Metered energy includes charging losses at 92% efficiency.
Range added per hour4.9 / 26.9 mi/hLevel 1 / Level 2 at your vehicle efficiency.
Plugged-in hours reduced per year with Level 22,438 hPlugged-in time, not attended time — overnight charging runs while you sleep. Level 2 install cost: $1,200 (one-time)

How it works

Daily energy = daily miles ÷ efficiency. Charging time = energy ÷ charger power. Monthly cost uses metered energy (battery energy ÷ charging efficiency) × the flat rate — Level 1 loses more to conversion overhead because its sessions run longer. A full 0–100% charge is shown for context — in practice most drivers top up only the day's use. The verdict rule is simple: Level 1 is enough when its daily charging time fits inside your overnight hours; otherwise Level 2 is recommended. Check the full-charge time too before relying on Level 1 for road-trip recovery.

Assumptions & sources

  • Constant charging power; real charging tapers near full and varies with temperature and battery state.
  • Charging efficiency defaults (Level 1 ~85%, Level 2 ~92%) cover AC-to-DC conversion and battery-management overhead; metered energy = battery energy ÷ efficiency.
  • Monthly cost uses a flat rate; time-of-use tariffs change the bill, not the charging time.
  • Level 2 install cost is a one-time input and varies with panel capacity, distance and permits.
  • Estimates only — check your vehicle's onboard charger limit and an electrician's assessment before buying hardware.

Related Joule Post coverage: Is a 120V outlet enough for EV charging? · Level 2 charger installation costs · Used EV battery health check · EV winter range loss by model