DIY Project for UPS that stays powered up for hours - not minutes

[Dax949]

I saw this project and have decided to do one myself. I thought I'd share it - looks like a winner to me.

https://www.instructables.com/Make-your-computer-UPS-last-for-hours-instead-of-m/

 

[tommu56]

I built an more involved one with 2000 watt victron inverter charger at the firehouse computers to run through until the emergency generator starts.

 

[Supervisor42]

I built an more involved one with 2000 watt victron inverter charger at the firehouse computers to run through until the emergency generator starts.

I got a little too serious with that because I had several important things that ran 24/7 when I was in Bama...
I wanted days, not hours.
The outside half of it:

24v, 510 AH, 1,000 lbs.

 

[Supervisor42]

I got a little too serious with that because I had several important things that ran 24/7 when I was in Bama...
I wanted days, not hours.
The outside half of it:
View attachment 206592
24v, 510 AH, 1,000 lbs.

Emergency shutoff switch and wiring under the house where the 5 big UPS units were:

Video of just one of them powering a circular saw, cutting a 2x4 available on request.
Also, a video of when it really mattered.
... I forget to add, "Don't be me!!!"