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One reason would be that it's nice to have a portable cable to take along for opportunity charging - If you have another EVSE at home, your modified OEM EVSE can be carried around in the car 24/7 and you won't have to coil it up and bag it each time you leave home after using it to charge. Plugging and unplugging, coiling the cord and packing it away is a painAnother reason is there are other EVSE's which offer features the OEM unit doesn't. My home unit is an Open EVSE that I built from scratch and it is user selectable to charge at 6, 8, 10, 12, 14 and 16 amps (actually, all the way up to 20, but the car can't use that much) on either 120 or 240 volts. It also has a timerLastly, it's nice to have a spare, since your car is basically useless should the only one you have fail you at the least opportune timeDon
One reason would be that it's nice to have a portable cable to take along for opportunity charging - If you have another EVSE at home, your modified OEM EVSE can be carried around in the car 24/7 and you won't have to coil it up and bag it each time you leave home after using it to charge. Plugging and unplugging, coiling the cord and packing it away is a pain
Another reason is there are other EVSE's which offer features the OEM unit doesn't. My home unit is an Open EVSE that I built from scratch and it is user selectable to charge at 6, 8, 10, 12, 14 and 16 amps (actually, all the way up to 20, but the car can't use that much) on either 120 or 240 volts. It also has a timer
Lastly, it's nice to have a spare, since your car is basically useless should the only one you have fail you at the least opportune time
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