EV Charging Guides
Plain-English answers to what it costs, how fast it charges and which level you need — the running-cost and charging-speed math no charger brand publishes.
Charger brands are happy to tell you their unit is fast and their app is great. What they rarely spell out is the actual math: how many miles you get per hour of charging, what a full charge costs on your electric rate, and whether any of that actually beats a gas fill-up. These five guides work through that math in plain terms — the same amps-times-voltage and kWh-times-rate arithmetic a spec sheet leaves for you to do yourself.
Every guide prints its assumptions instead of hiding them, so you can swap in your own car’s efficiency and your own utility rate and get a real answer for your driveway, not a generic one. Between the charging-level basics, the speed math, the running cost, the gas comparison and the cable-style choice, this is the reference section to work through before you buy anything.
Everything in Guides
EV Charging Levels Explained (Level 1, 2 and DC Fast)
The three charging levels and AC vs DC in plain terms — how fast each really is, and which one belongs in your garage, with a one-glance speed table.
Tethered vs Untethered EV Charger
Attached cable or a socket you plug your own cable into? Which suits your garage, your budget and how future-proof you want to be.
How Much Does It Cost to Charge an EV at Home?
The kWh-times-rate math worked out for popular EVs, with a calculator and every assumption stated so you can drop in your own rate and re-run it.
EV Charging vs Gas: The Real Cost Comparison
Cost per mile for charging at home versus filling a comparable gas car — the arithmetic, a calculator, and where it flips.
How Long Does It Take to Charge an EV at Home?
The miles-per-hour math for Level 1 and Level 2, why the last 20% is slower, and how to size an overnight charge to your commute.
The math brands don’t put on the box
How fast will it actually charge?
Charging speed comes down to one calculation a spec sheet leaves for you to do yourself: rated amps times 240 volts gives you the power in kilowatts, and dividing that by a reference efficiency of roughly 3.5 miles per kWh gives you real miles of range added per hour. A 40-amp charger works out to about 34 miles an hour; a 48-amp charger, about 40; a 50-amp charger, about 42. That figure matters more than any brand's own marketing copy, because it's built from the same reference efficiency every time and lets you compare two chargers that quote their numbers differently. Our how long to charge guide runs that math against real battery sizes and commute distances so you can size an overnight charge to your actual driving, and our charging levels guide covers where Level 1, Level 2 and DC fast charging each land on that scale, and which one actually belongs in a home garage versus a road trip.
What will it actually cost to run?
The other number no spec sheet prints is the running cost, and it’s simpler than the speed math: kilowatt-hours used times your electric rate, nothing more exotic than that. A full charge on a typical EV battery is a handful of kilowatt-hours, so the total is smaller than most people expect — but the exact figure depends entirely on your battery size and your utility's rate, including whether you're on a flat rate or a cheaper overnight time-of-use plan. Our cost-to-charge guide works that out for popular EVs with a calculator you can drop your own rate into instead of trusting a national average that may not match your utility bill, and the EV-vs-gas guide takes that same cost per mile and lines it up against a comparable gas car, with its own calculator, so you can see exactly where charging at home wins and by how much for your specific numbers.
The one choice that doesn’t change either number
Whether your charger has a cable already attached (tethered) or a socket you plug your own cable into (untethered) has no effect on either number above — it’s purely about convenience, cable wear over time, and which chargers are available at each price point. Our tethered vs untethered guide breaks down which style actually suits your garage and how you park, once the speed and cost math above has told you the amperage and budget you’re actually shopping for.
Frequently asked questions
How much does it cost to charge an EV at home?
It's kilowatt-hours used times your electric rate. At an illustrative US average of roughly $0.15 per kWh, a typical EV battery costs only a few dollars to top up — but your actual cost depends entirely on your utility rate and battery size, which is why our cost-to-charge guide includes a calculator for your own numbers.
How long does it take to charge an EV at home overnight?
For most daily driving, a few hours. A Level 2 charger adds roughly 30 to 40-plus miles of range per hour depending on its amperage, so replacing a typical 30-40 mile commute takes about an hour, and a full overnight charge easily covers even a much longer day.
What's the difference between Level 1, Level 2 and DC fast charging?
Level 1 uses a standard 120-volt household outlet and adds only a few miles of range per hour. Level 2 uses a 240-volt circuit, like a home charger, and adds roughly 20 to 40-plus miles per hour depending on the charger's amperage. DC fast charging skips AC entirely and can add well over 100 miles in 20-30 minutes, but it's built for road trips, not daily home charging.
Is charging an EV at home actually cheaper than gas?
In most of the country, yes, on a cost-per-mile basis — home electricity rates are typically lower per mile than gasoline once you run the numbers. How much cheaper depends heavily on your local electricity rate and gas prices, which is exactly what our EV-vs-gas guide compares side by side.