That part is trivial, at least for 240V/50A, although the whole charging station would be carried around as cargo and dumped on the ground beside the campsite's power pedestal; the whole point of this product is to be the stationary side of a detachable charging connection. These Level 2 charging stations are designed to plug into common (for the voltage and current) household outlets:I would like to be able to have one installed in my vehicle and rig adapters to plug it into an RV campground or marina 30A or 50A supply.
This hardware is a just a fancy cord, with circuitry to exchange capacity information with the car's charger, and a relay to turn on only when appropriate. It doesn't convert the power at all; it just passes the 120V or 240V AC power to the car's onboard charger, which handles the conversion to DC at battery voltage. The vehicle with a compatible port is expecting 120V or 240V AC power.And to convert output to 12V or 24V as required.