Wayne Sallee wrote:
Another thing that can be done is to hook up a car battery to your ups
for longer running time. You could even hook up as many batteries as you
like.

I've never seen a UPS with a 12 volt hook up. I use APC's and even have
a 80# version w/ no hookup.

I was looking into a power failure relay, but haven't made much
progress. I think I'll just build my own as I've been thinking of a
battery bank anyway for other reasons.

--Kurt