Ah okay. It did mention the trailer already has regenerative braking. So I am wondering if when the battery is charged, if the extra energy could be stored in the TV battery as it wouldn't have room to go back in the trailers battery. Maybe I'm misunderstanding how it all works.
anything can be easily programmed with electric power. which is the beauty of electric motors. fully variable power output/consumption in a dial. want to blow the doors off that Corvette crank it up. need to get 500 miles.... reduce power available and start sipping like a hyper miler in a TDI. that massive adjustability is the attraction of e-power. with a gas engine you get a bit of flexibility but no where near the range efficiency of a computer controlled electric power train.
On energy consumption, wether it is gas or electricity they both gobble up the fuel and kill the range when cranked up for peak power. An electric motor is no less efficient than a V8 on nitrous, nitrous requires an additional pump, plumbing to deliver enough gas for combustion. an electric motor can do the same thing by twisting a dial..... and likely beat that nitrous injected pro street racer.
For an IT geek guy...... electric Civics will be better than the tuner racers of the past decades.