Big Hydrogen Engine as backup, is not good, bad balanced..
Large hydrogen engine, like backup, is not very well balanced, eat too much ice, and charge too low.
This is unusable for big grid ships, because solar energy is much better as a backup, and large hydrogen engine is absolutely unusable as primary energy.If I mine Ice, a lot of ice, looooot of ice, long time with big ship drill, a hydrogen engine to eat everything very fast and the charging effect is minimal for something practical.
If it's okay balanced, then I eat sh..t.
Or add some for ... no drain hydrogen tank for thrusters with hydrogen engine, or add 2 status bars, one for hydrogen engine and one for hydrogen tank...