When you have something like ryan or maybe like me (different stuff) it’s not working.
I have a project for diy ups with 14 hours back-up (500w consumption/hour).
I have 1 server, media converters, switches, routers (2x1gb providers) and other s@#s).
It’s expensive to have 1 ups with back-uk power for 20-24 hours at ~1kw/h.
U need 720 amps at 48 volts for 24 hours, at 100% draw from accu.