[Spaceships] Where are the Capacitors?

[jacobmuller]

I keep seeing Fuel Cells referred to as requiring fuel. I must be misreading the "closed system" bit. I think of them as burning their stored H-LOX and requiring outside power input to turn the exhaust water into H-LOX. Rechargeable batteries? Refueling would be faster but, to my mind, that isn't a closed system; Physics: "a closed system can exchange energy, but not matter, with its surroundings." This is how batteries work.

Turning it into a powerplant/capacitor system...
Csomic power level weapons and shields using standard powerplants. The Fuel Cells would be your capacitors and they'd be 1,000 of the size required. For a 20sec turn, a 24hour fuel cells becomes a 4shot battery. Recharging the capacitors from a power plants/solar units logically takes more power than they produce.

You'd have to find a scale below Cosmic for a playable rate of use; perhaps make your power systems a mix of capacitor/generator on a ratio that gives a decent recharge rate. A bit of number-philia will get you there.