A constant voltage power plant that uses batteries as its emergency source of power

Described is a system that regulates voltage to the load. It is also efficient and incurs some economic benefits. It is explained how this power system provides more effective use of battery back-up power for more capacity, faster recharge after discharge, longer life, and less investment; has, during normal (not emergency) operation, rectifiers that are more efficient, have less connected load for emergency generator sizing, and are used more efficiently for battery recharging and float, and provides voltage regulation that does not cause inefficiencies during normal plant operation, causes only minimal inefficiencies during emergency operation (and then only for a short time), and is within 0.10 volts whether normal or emergency conditions exist.<>