Shield Banks...
So, each bank = shields value. If in a turn your shields drop below 0, you take armor/hull damage, next turn you would turn on the next bank you have available and have shields again?
Example.
Carrack Cruiser
35 Shields
02 Shield Banks
Turn 1, activates Shield Bank 01. Current shields: 35/35
-> Takes 50 damage.
Turn 2, shields 0/35, 15 damage to armor, Shield Bank 02 activated.
-> Takes 30 damage.
Turn 3, shields 05/30.