2022 Bolt EUV Premier
Don't confuse L1/L2 charging and DCFC. Completely different things and not related, other than using the same connection (kinda, since DCFC has the two extra connections). For L1/L2 charging, the charger itself is contained in the car, and the cable (EVSE) is merely used as a connection. Each EVSE is rated at a maximum current level, regardless of what the vehicle can accept. The EVSE included with the car is only good for 12 amps, regardless of feeding it 120 or 240 VAC. You can buy inexpensive (under $200) EVSEs that are rated at 16 amps, which is the maximum level the PHEV can accept. With the Niro EV, the on-board charger can accept 32 amps, which at 240v is 7.6kW. But the EVSE included with the car is still limited to 12 amps, which at 120v is 1.4 kW.Maybe another way to explain, from the thing you plug into the car (the plug we would call it, cable would refer to the wires) the car can determine Level 1, Level 2, DC high voltage.
The car will only draw a max 12 amps is what is being stated. Of course drawing 12 amps at 240 volts is different than drawing 12 amps at 110.
In the USA, where we have 110v utility outlets, you can get faster charging if you can take the L1 "charger" and connect it to 240v in some cases.
This was the case with my Fiat 500e EV, so you got a faster charge if you fed the 110v "charger" with 240... not approved by Fiat, but many people had success.
So if your supplied L1 charger can handle 240v and you connect 240v to it, then it should charge the car faster than on 110v, but this all ASSUMES that the car itself, where the "charger" really resides, does indeed allow 12 amps at 240v
Yes, the factory EVSE will charge faster if it's connected to 240v, but it's still limited to 12 amps. So you only get ~2.9 kW, which is far less than the 7.6 kW the car can accept. Faster than 120v, yes, by a factor of 2. But still much, much slower than a 240v EVSE that provides 32 amps.
That's why it takes so much longer to charge a PHEV/EV at 120v. Since the owner might only have 15 amp circuits in their garage, they won't include an EVSE that supports a higher rate. It's a safety issue. For any plug-in car, it's worth the investment to install at minimum a 16 amp 240v EVSE. I installed a 40 amp EVSE, even though my PHEV only accepts 16 amps, since I'll likely get a full EV when my lease it up and I wanted to be ready.