Do you actually need 48A?
Here is the test, and it has three parts. You need all three to be true.
1. Your panel can feed a 60A circuit.Not “probably” — ask an electrician for a load calculation. A 60A dedicated circuit is a substantial addition to a 100A service that already runs an electric range, a dryer and air conditioning. If the answer is that you need a panel or service upgrade, stop here and buy a 40A charger; you will save thousands and lose eight miles of range per hour that you almost certainly will not miss.
2. Your car can accept it. This is the one people skip. Charging speed is set by the lowestof three numbers: the circuit, the charger and your car’s onboard AC charger. Plenty of EVs cap AC charging at 32A or 40A regardless of what you hang on the wall. A 48A charger feeding a car that accepts 32A charges at exactly 32A — you have paid for a bigger breaker, thicker wire and a more expensive install to get nothing. Check your specific model and year in the owner’s manual before you spend.
3. Your driving pattern rewards it.Over a normal eight-hour overnight charge, 40A adds over 300 miles and 48A adds roughly 370. Both numbers exceed what nearly anyone drives in a day. The step to 48A only pays when your window is short — you arrive late near empty and leave early — or when two EVs share one charger and you are trying to fit both into one night.
If all three are true
Then the Emporiais the pick, and it has a genuinely useful property: it ships preconfigured on a NEMA 14-50 plug at 40A and converts to a hardwired 48A install later. That means you can start on the cheaper install, live with 40A for a year, and step up if it turns out you actually need it — without buying a second charger. A charger you cannot down-configure is a charger that becomes scrap if you move house or discover the panel will not take 60A; this one covers both outcomes. For most people reading this page, that is the smartest path through the decision.
The ChargePoint Home Flexused to lead this page on the strength of its 16–50A amperage dial. ChargePoint now sells the hardwired and plug-in Home Flex as separate models, and as of 20 September 2026 the hardwired one — the only version that reaches 50A — is not listed on Amazon. The Home Flex on sale there is the NEMA 14-50 plug-in, a 40A unit, so it no longer belongs on a 48A list; our Home Flex review covers what that model is and is not.
If the electrician comes back and says there is simply no room for a 60A circuit, do not give up on 48A yet. The Emporia Pro is the same 48A charger with dynamic load management and a panel monitor bundled in, which throttles charging to whatever headroom the service has left — the recognized way to run a big charger on a small panel without a service upgrade.
Why 48A must be hardwired
Because of the 80% rule. A charger draws its rated current continuously, and code requires a continuous load to sit at or below 80% of the circuit’s rating. 48A is 80% of 60A, so a 48A charger needs a 60A circuit. The NEMA 14-50 receptacle everyone uses for plug-in installs is a 50A device — it tops out at 40A continuous. There is no plug in common residential use rated to carry 48A continuously, which is why every genuine 48A unit is hardwired. If a listing advertises 48A on a plug, something in the claim is wrong. Our amps and circuits guide works through the whole table.
What the install really costs
A 60A circuit needs heavier conductors than a 50A one, and the price gap grows with distance from the panel. Add the hardwire labor, the permit and inspection, and the possibility of a subpanel or service upgrade, and the delta between a 40A plug-in install and a 48A hardwired one is frequently larger than the price difference between the chargers themselves. Get two written quotes with both options priced before you decide — that single step resolves this question faster than any spec comparison. The installation guide covers what to ask, and our 40A vs 48A comparison lines the two routes up on the same charger so the amperage is the only variable.
The Tesla case
Before that, two pages worth reading alongside this one. The Volkswagen ID.4 is the clearest example of a car that genuinely needs 48A, because VW publishes an 11 kW ceiling that a 40A charger cannot fill. And if a 60A circuit is what your panel cannot spare, our 100-amp panel roundup covers the load-managed route to the same amperage.
If you drive a Tesla, the Emporia Level 2 NACSversion does the same 48A job with a factory Tesla connector, so there is no adapter hanging off the handle. It is the same trade-off as the J1772 model in every other respect. If you might not always own a Tesla, the J1772 version plus the adapter that came with your car is the more flexible buy — our Tesla charger roundup argues both sides properly.
What we would skip
Skip 48A entirely if your panel is tight; buy a 40A charger and spend the difference on a proper industrial receptacle. Skip any high-amperage unit that does not publish an adjustable range — fixed 48A is fragile if your circuit turns out smaller. And skip the assumption that more amps means faster charging on your particular car; check the vehicle’s onboard AC limit first, because that is the number that will actually govern your mornings.
One car makes the case for 48A better than most, and it is a useful worked example of the arithmetic above: Kia publishes a 10.9 kW onboard charger for the EV6, which is about 45 amps — just past what a 40A charger can deliver. Our home chargers for the Kia EV6 shows what that gap costs in real overnight hours, and what the connector change in 2025 does to the shortlist.
And one car makes the case the other way, by running straight past this tier. Cadillac lists a 19.2 kW AC onboard charging module on some LYRIQ trims, which is 80 amps — more AC power than any residential charger on this site can supply, so on that car even 48A leaves capability on the table. Our home chargers for the Cadillac LYRIQ works through what to do about it. And if you would rather see this tier next to every other one on published specs, the Level 2 comparison chart puts all of them in a single table.
