Does ANYONE have a Battery Backup on an XPS Studio 435T?

Does it work? That is if you pull the UPS power from the wall, will the System Unit stay on?

Dell tells me I need a 'server' type UPS. If nothing more, one that works with a PFC PSU.

I now have and APC RS 1000, a 600W unit. Either pulling the plug or doing the power drop test with its s/w will NOT keep the system unit up. Anything else connected to the UPS (done as a test) will stay up, such as a display or printer. The UPS does have sufficient reserve power to handle a 475W PSU in the 435T.

APC tells me I need an SUA1000, almost a $500 list item. I went to Best Buy and 'asked' the Geek Squad about this. They said the 1285VA (750W) model they have works just fine (a re-badged CyberPower). Bought it, didn't work, back it goes.

Tripp lite tells me a  SU1000XL will do the trick, another almost $500 UPS...

From what I've been able to determine, the problem is either the shape of the sine wave and/or the battery transition time. All the 'home' units seem to have a 2 - 4 millisecond transition time. This it appears might not be quick enough.

There are 'server' type UPS's and they are either 'On-Line', 'Double Conversion', or 'True-UPS' in design. Finding any that supports a 475W PSU under $450 is hard to do, unless you buy 'used' which are just under $200.

So, if anyone does have a UPS connected to an XPS Studio 435T, and you think it works, please reply with the model number of your unit. Also, check it out too, pull the power from the UPS or run the battery test please.

Dell tells me others have complained about this and the choice I have is return the 435T, don't use a UPS (not here in Florida with the the thunderstorms), or get a better UPS that works. I don't mind spending $200 but $500 is questionable... so the system might be returned... and I'm not too happy about that at all.