im a moron how do you fire the plasma cannon

The solar panels dont seem to do anything? Even with fully charged batteries it doesnt power the vehicle. Are they only supposed to power other onboard equipment?

yes the power generators only work the equipment you still need fuel for it to drive its like poweramror

Get close enough to enemies and it will fire so long as you have enough electricity it will fire at them. Careful near your base as the area damage can blow up your buildings.

Also, it will kill you and your vehicle. Beware!

The Vehicle roboports, I can't get them to work, am I missing something? Wanted to put one in my train.