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 ChargePoint Home Flexis the safe default, and the reason is the amperage dial rather than the top number. It configures from 16A up to 50A, which means it fits whatever circuit your electrician actually delivers — including a smaller one now and a bigger one later. A charger you cannot down-configure is a charger that becomes scrap if you move house or discover the panel will not take 60A.
The Emporiais the value answer, 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. For most people reading this page, that is the smartest path through the decision.
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.
The Tesla case
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.
