I feel like the current way to store power is kind of uneccessary. I think it would be better if power storage could be done with batteries or power cells. there are already chargers in the game. I think it would be good if the mode of a charger could be changed to battery mode. this would encourage building more power cells and upgrading them for the base.
this way there could also be progression: by using small batteries for small power storage at the start, then advancing to power cell storage.