Find the loss for the power inversion that would take place in the UPS

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harmander
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Hey guys,

I tried to figure this out and got a rough estimate but thought I’d ask the experts.

I use the Sola SDU500 UPSs in our systems. A customer wants to know how long they will last if there is a power outage. I believe the power consumption for the entire system would be ~12Wh
total load will be 205 Wh/day

The specs for the UPS are as follows:

· Capacity (VA/Watts): 500/300
· Load power factor: .6
· Back-up time: 4.5/18 (full load/half load)

I can’t seem to find the loss for the power inversion that would take place in the UPS.

Let me know what you think
 
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Here is the data sheet

http://datasheet.octopart.com/SDU500-Sola-datasheet-22869.pdf

It says 4 mins (not 4.5) at 300 watts which equals 4/60 * 300 = 20 watt-hours at full belt.

This takes into account the conversion efficiency in the inverter.

Don't know what your system is but do not connect a printer, particularly a laser, to this UPS as you will get spikes that will greatly degrade performance.