At first I mourned the environmental cost caused by this fraud. After seeing the 'generators' at least I can let that slide. I think this is probably the best example of 'virtue signalling' I've ever seen.
My point was that those trailers have 2500kw of solar (under ideal conditions). There intended purpose is to put them onto a site temporary for an event. The process of moving then a few miles uses more energy than you'd expect to gain from them over a few days.