I get that, but US freight doesn't want to eletrify railnetwork at all. From my understading this is because even where it's totatly doable, but financially not feasable for various reasons (IIRC one of them are double stacked containers?).
4.5MW of power for GE 6000 locomotive (might be incorrect but it comports with other comments here), and i routinely see freight trains with 3 or more locomotives (i've seen way more than 3, but i don't have a picture or anything). In the midwest, where it's flat, trains can be miles long. I've counted over 250 on a single train before. and that's 4+ locomotives, so >18,000,000 watts.
I guess they could keep freight trains real short so they're single engine, but that's still 4 and a half million watts stall. Each one can move itself plus at least 10,000 tonnes (i don't know the conversions, nor care, it's a lot of mass) The world record is 82,000 tonnes, 4.5 miles long, 682 cars, 8 locomotives - in Australia, with american locomotives, hauling iron ore.
I have to ask, are you from or in the US?
GE does make a battery powered locomotive, designed to be used for regenerative braking, it can run at full power by itself for a half hour or so https://en.wikipedia.org/wiki/Wabtec_FLXDrive 3,200,000 watts.
