On Tue, 2005-08-30 at 13:07 -0700, Mike McMullen wrote: > Duh... that would help wouldn't it? ;-) Actually, power supply rating isn't a really good indicator. We use a gadget called a kill-a-watt meter that will tell you what a particular machine draws steady state, and then you can know for sure where you stand. Normally, boxes run way under their power supply rating, unless they are full of drives. The meter will also tell you what the power factor is for the box (or boxes) as well as the watt and VA ratings. Those numbers are the necessary ones to size the UPS properly and then get as much battery capacity as needed to supply the run time required. The savings in the (typically) smaller UPS you purchase is more than what the meter costs. Try to run your UPS's at or above 80% utilization for best efficiency. Ferroresonant technology although expensive is the best you can get if that matters. -- Bill Gradwohl (817) 224-9400
