engegy consumption across series?

[Anonymous user]

Some of the APC models have AVR boost, some AVR boost + trim, and some pure sine-wave output vs. stepped.

For a given "size" unit, is one type more efficient than another to operate, say on an annual basis, in off-battery mode?

Thanks!

BK

[Erasmus_apc]

You can see efficiency ratings on many of our UPS' on their respective tech. web pages. In offline mode, most of the draw you would see from a UPS is from the load. A smaller, additional amount would be from the UPS charger. Smaller back-ups units have a charger that ranks in at under 20 watts, while the double conversion online UPS' have chargers that can come close to 400w (note that that figure is not a reflection of accurate average draw from the UPS while charging). Naturally there is also a negligible (5w-10w at most?) draw from the LEDs and other basic circuitry on the UPS. In terms of efficiency, I suppose the most efficient UPS would be what could support the most real draw (watts) at a given VA range. This would typically be Smart-UPS modular units for the Smart-UPS range, and Symmetra LX units for the 8kva and up range.

[Anonymous user · Accepted solution]

Thanks for the info. The heat that my unit gives off on an ongoing basis prompted me to ask the question. I was unable to make any sense of the efficiency ratings that are listed for some of the models. I understand that about 20w is probably typical. You would think that APC could publish some real numbers under standardized conditions, sort of like you would find on major appliances these days. I'm still unclear on how much it would "cost" me to keep the various units plugged in on a monthly or annual basis.