Disclosure: Manufacturer links on this site are plain links, not affiliate links yet. If that changes we may earn a commission at no cost to you, and this notice will say so. We have not tested any charger. Specs come from ENERGY STAR certification data and EPA/DOE fuel economy data; charging-time, range-per-hour and cost figures are estimates. Not electrical advice: have a licensed electrician size and install your circuit. Learn more.

How we calculate

Charger specs (kW, amps, cord, network, standby/idle power, losses) come only from the ENERGY STAR Certified EVSE AC-Output dataset via its public API, retrieved 2026-10-17. Every charger page links its own record. Duplicate listings (same brand, model, kW and standby power) are merged and all record IDs are shown.
Vehicle efficiency and range come from the fueleconomy.gov vehicle file (EPA kWh/100 mi combined, EPA range, EPA 240 V charge time), latest two model years per model. Each trim links its record.
Range per hour (estimate) = charger kW ÷ kWh/100 mi × 100. EPA kWh/100 mi is measured at the wall, so it already includes charging losses.
Empty-to-full time (estimate) = (kWh/100 mi × range ÷ 100) ÷ charger kW. It ignores tapering near 100%, temperature and the car's onboard charger limit, which EPA does not publish. Where EPA gives a 240 V charge time we show the average power it implies.
Breaker size (estimate) = 125% of charger current rounded up to a standard breaker size, per the continuous-load rule. Not electrical advice.
Standby cost (estimate) = ENERGY STAR no-vehicle-mode watts × 8,760 h × rate: an upper bound.
Electricity rates: EIA Table 5.6.A, July 2026 (preliminary).

Data license

ENERGY STAR data is published by the U.S. EPA; the dataset's metadata names the EPA Standard Open Data License, under which EPA data is in the public domain (17 U.S.C. § 105). fueleconomy.gov data is produced for the U.S. DOE and EPA. EIA data is a U.S. government work. We are not affiliated with or endorsed by ENERGY STAR, EPA, DOE or EIA, and we do not use the ENERGY STAR mark.

What we don't cover (data gaps)

Prices, warranties, app features, plug type (J1772 vs NACS) for most listings, and reliability are not in ENERGY STAR data.
Onboard charger limits and usable battery capacity are not in EPA data.
Many listings use model numbers only; we don't guess marketing names.
Chargers that are not ENERGY STAR certified are not included.

We do not test products, accept free products, or publish reviews or star ratings.