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Aloha this is not a discussion to promote agms vs lithium, but I have noticed that small AGM's (such as 9hr ones) that you would find in UPS's have about 40-50% more ah versus weight compared to an Optima for instance.
Optima=520 cubic size 41 # and 50AH
UPS Bat=60 cubic 5# and 9 ah
So you can put 8.2 of these UPS batteries @ 41# in the optima space and get 74ah and even have a smaller footprint.
I recently got 100 of the UPS batteries for free from company that changes them out every 18 months, so wondering if it is worth a try to say parallel 10 and series 16 to make (total 160) 192V @90ah.
Other than "Forget it and buy Lithium" does this seem workable?
Francis
Optima=520 cubic size 41 # and 50AH
UPS Bat=60 cubic 5# and 9 ah
So you can put 8.2 of these UPS batteries @ 41# in the optima space and get 74ah and even have a smaller footprint.
I recently got 100 of the UPS batteries for free from company that changes them out every 18 months, so wondering if it is worth a try to say parallel 10 and series 16 to make (total 160) 192V @90ah.
Other than "Forget it and buy Lithium" does this seem workable?
Francis