It's a somewhat unusual choice since there's not much that gets run on 240V/20A, but it's a great choice for a simple EV charging point install so long as you can get a proper adapter. If you can live with only charging the EV on the circuit, you wouldn't have to change the wiring (assuming it was properly wired for 20A) and you'll get double the charging speed as plugging into a 120V/20A receptacle. Plus the efficiency of 240V is a bit better than 120V so you gain a little extra there. Actual rate for continuous load is 240V/16A which translates to ~3.84 kW.