Big Katuna wrote:
Good luck. If you end up replacing them with wet cell, spend up and get a Profill system.
You replace all the caps with their caps plumbed together with tubes to a common point.
You connect a hand bulb to it once a month stick the hose in a gallon of distilled water and it fills all the cells. Their cap prevents over filling.
My 13 year old RV is on its third set of T 105s.
I think I'm done with lead acid batteries.
You can buy 5.2 KwHr Tesla battery packs (444 cells) for $900 on eBay. My current 6 GCB system has a theoretical capacity of 12v x 660 AH = ~ 7.5 KwHrs. However, you can only discharge GCBs to 50% of their capacity or they won't last. 50% of 7.5 KwHrs is 3.75 KwHrs useable. LiON can be discharged to 80% with no ill effect. 80% x 5.2 KwHr = ~4 KwHr useable.
Using a Tesla battery pack would require a lot of engineering in terms of the battery management system, but it would be worth it.
My plan is to run these batteries for the rest of this year and next and then replace them with a Tesla battery pack.
