Cool, one of the projects I have lined up is to replace the AGM (Lead-Acid) batteries in my UPS. I'm currently running a 3,300va and two 1500va units for my network and security systems. My whole house is automated and we have over a dozen Echo and Google devices all the switches, the load center and half the breakers, etc. There are ove 90 devices connected to it. It really can't go down. Swapping batteries will add many hours of run time.
I get these cases from China, they hold 21 cells in a 3s 7p configuration. Should increase the capacity by well over half.
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