- A personal engine that converts burnable fuel sources into electrical energy. I like the idea of running around with the coal or solid fuel or rocket fuel or eventually even nuclear fuel necessary to power my equipment.
- Charging stations. Why would I try to power my equipment solely from solar panels when I already have an entire electrical system that produces far more power? I'd like the ability to place batteries (and other charging equipment) in a charging station, then swap them out with the batteries in my armor while preserving their electric storage, which currently isn't quite possible when even moving equipment within a grid will lose its energy.
I know there are mods that can enable variants of the above things, but I think the sheer power gap between solar panels and fusion reactors, along with the breaking of the willing suspension of disbelief, should be addressed.