UPS question

[budec]

This is a very stupid question... but the "UPS suggestions" thread got me thinking.

If I had two UPS's could I say hook them up in serial like this:

'Outlet'<->[UPS]<->[UPS]<->{Computer}

Would that effectively "double" my battery time or is it just stupid and/or would fry something?

 

[davidhammock200]

Just stupid.

 

[BillParrish]

If you are concerned about run time, I used to do this (moved and the power is better so I havent done it in a few years, so I am not up on the newer UPS worked fine with older APC's)

I allways made sure when I shopped for a UPS I could get to the battery connections of the UPS I would then rig up some leads to bring the battery connections out of the UPS case and hook up a car battery sitting in a battery box (sporting goods or auto parts store). I spliced in a 10A inline fuse on the hot lead. For a while I just every 3 years bought a new car battery and used the old one that still had good life on the UPS. A deep cycle trolling motor battery would be perfect.

Anywho, I could run the machine for couple of hours easy,

 

[[Spectre]]

Would that effectively "double" my battery time or is it just stupid and/or would fry something?

No it won't double your runtime. The second UPS will switch to battery as well when the first one does. This is a bad idea.

If you want longer battery time get a larger UPS or a unit with expandable battery options.