var, var, var, var, var, so sad. well, I wouldn't go offline for 30 minutes, cause I would be way too open for attack, and I wouldn't dry out my reactors. that's just stupid. My ships don't run on full power. They keep half of the reactors for weapons. Cruisers have 2 reactors, one for systems, the other for shields and weapons. Corvettes have 3, 2 medium ones for weapons and one small one for systems. my destroyer and carriers have 4 reactors, and my juggernaught has 10 reactors. 2 are for the advanced systems (including the cloak and dimension jumps), 2 are for shields, and the remaining 6 are for the weapons. That's how it's set up. Depending on the enemy ships, the reactors will activate. the scans show the defences of the enemy ships and hull plating. The engineers then activate the reactors accordingly.