"Greg O" wrote in message
...

"Tim Shoppa" wrote in message
oups.com...

Most residential customers still pay for watts, not amps, don't they?



Sure, but twice the amps at the same voltage equals twice the watts.


Not true. Twice the amps at the same voltage equals twice the VA. VA
times power factor = watts. This is why they always rate cheap UPSs in VA.
They assume a 50% power factor so a 500 Watt UPS suddenly becomes a 1000 VA UPS
(read the small print). It just sounds better to the uninitiated.

Vaughn


Greg