Spaceships series: Electrical Batteries module?

[Anthony]

Originally Posted by Ulzgoroth

Physics can give you minimums for how much power a power point must be based on the various power-consuming systems.

Which are somewhat inconsistent. I'm fond of 1 ep = 50 kW/ton, as generates reasonably plausible power densities, but to do that you need to reduce ion drive thrust by a factor of 5 and mass driver by a factor of 10.