so I listened to your podcast on TSP
(001 tsp-01039-harris-on-emergency-home-power-battery-backup-show-1-of-2-show14-32k) on the way to work this morning, will listen to part 2 on the way home this arvo
My specific question here is to do with SLA batteries for a battery bank.
I know you covered this a little in that podcast but I’ll tell you my situation and see what you think
Through work I have access to lots & LOTS of 12V 7Ah SLA batteries from UPS systems.
These batteries are in medical equipment so:
1. The batteries are very new when 1st installed (normally 6 months or less from manufacture).
2. They are on charge 24/7 and very very rarely do they ever get loaded and discharged at all.
3. They are replaced every 2 years, so they are quite ‘young’.
4. I also have a battery analyser at work that I can do a full charge and discharge on to confirm the actual capacity, so I can weed out the dead ones
Currently I have about 40 of these at home so around 280Ah worth of batteries, and access to a lot more.
I also have access to lots of free mini Anderson Plugs like these:
They are on some of the medical batteries, and they just get thrown out so I have been stocking up on them.
My idea was to have most of the batteries connected in parallel via some 150A busbars, like this (or bigger ones):
some inline fuses and no intention of being portable.
Then I was looking at having a few for hunting, camping, portable etc, then when I get back home or have finished with them, charge up, then connect them back up to the home battery bank system.
The plan would be to have the entire system hooked up to a 3 stage charger so they are charged and ready to go.
Interested to hear feedback and ideas.