If you get too far above the recommended power load factor, the internal batteries won't likely ever get a good discharge and recharge cycle, which will shorten their mean lifetime considerably.

For example, someone who uses a UPS that is 5 or 10 times greater in capacity than the needed power draw will likely never discharge the typical gelled lead-acid batteries inside the UPS deep enough for them to go through their proper chemistry dance in the discharge/recharge cycle -- and the plates will become sulfated in a much shorter period of time. Once the internal plates are sulfated, there can be no electron flow. Dead battery way before its time.

The Power Factor Correction is a neat thing that can save you money when it comes time to pay the Electric Company, BTW. PFC attempts to keep the Current from "leading" the Voltage or the inverse of Voltage leading the Current, which is something that the type of load creates. Whenever one is ahead of the other, the power metering overturns in favor of the electrical utility, not us.


--Mac

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