Answer for:

Which UPS to buy?

Message 7 of 16

View entire thread
0 Votes

Interesting. By the definitions then, most of the home and small office UPS systems sold in the US are actually SPS systems. I have yet to use a portable "UPS" that runs off of the inverter when main AC power is present.

I would expect that some large building and data center UPS systems are running off the inverter.