Level 1 charging (120 V): is it enough?
A regular household outlet charges slowly, but overnight it often covers a normal day’s commute.
Checked Oct 24, 2026
Speed
Level 1 charges at about 1.2–1.9 kW, usually around 1.4 kW. After losses, that’s roughly 1.3 kWh an hour into the battery, or about 4 mi of range per hour at 3.5 mi/kWh. Ten hours overnight adds about 44 mi.
Cost
Level 1 costs the same per kWh as any other home charging, at your utility rate. Example: 18.16¢/kWh (Average residential electricity price, US (EIA EPM Table 5.6.A)). It is slightly less efficient than Level 2 because more energy is lost over the long session.
Safety
- Use a dedicated circuit if you can. Never use a light-duty extension cord.
- Check the outlet and plug for heat after the first sessions. Have an electrician check old wiring.
- If you drive more than about 44 mi a day, or it’s very cold, plan for Level 2.
About sales tax
US prices on this page are shown as published. Gas pump prices already include federal and state fuel taxes; electricity rates and public charging may have state and local sales tax added on top, and that varies by state, county and city, so we don't split it out. Check your bill or the charger app for the tax that applies to you.
Sources and dates
- Average residential electricity price, US (EIA EPM Table 5.6.A): www.eia.gov (Aug 2026; checked 24 Oct 2026)
Compare public charger prices: Prices change, check before you charge. The price shown in the operator’s app or on the charger is the one you pay.