In general, to keep the minimum required bar around the 50% mark, there should be 3 or 4 rooms per 50 units of power storage (or a consumption of about 1. The level of power required to keep out of the red is approximately equal to the total power consumption of all rooms times 13.5 (since the value in stats is rounded, these are rough figures).

The requirement bar's position (the green bar on the power meter) is directly related to the aggregate power consumption of all rooms. As mentioned before, it is better to take adequate shelter than risk high exposure by trying to get to a better fallout shelter located halfway across town.

The sweet spot in power-to-production/capacity is a level 2 double spaced room. Going into the basement is probably your best choice if a nuclear blast occurs while you are home. food with the dwellers out of the vault wandering is looks like 75 consumption per minute, which I handed with some nuka cola bottlers. I believe a full vault uses around 200 power/minute so you want around 400 power a minute production minimum. Level 2 rooms consume ~20% more power than their level 1 counterparts and level 3 rooms consume ~83% more power than level 2s (or 10% more than two level 1 rooms ). the power is enough to power a full vault.

Power can also be acquired through lunchboxes.Ī double spaced room consumes 5% more power than two single spaced rooms and a triple spaced room consumes 10% more power than three single spaced rooms.

Nuclear reactors, available at 60 population.

Power generator rooms, available from the start.

Fallout shelter power plant vs nuclear