Originally Posted by
Nialler
No. The UPS is more than a bank of batteries. It's an expensive piece of kit which smooths the supply during Brown outs, during spikes and during the absence of any power at all. The electrical input to a properly specced enterprise server should never fluctuate.
Many of the major systems I have dealt with run on batteries all the time. The choice is which system: grid, standby grid, standby generators to trickle charge the batteries.