I have a solar camping setup. And I have a supply of 75% ok 12v gel lead acid batteries the 21ah kind.
Needing as much power storage as I can get I thought I would be able to hook these 12v gell batteries up in parallel, obviously knowing in some form the bunch of batteries I have wired together will be pulled down by the battery with the lowest capacity.
Anyways - I hooked them up to my solar controller and they went flat - didnt charge at all. Controller output was from memory 14v. Its enough to charge the 12 100AH deep cycle lead acid I have. So first question is any ideas why?
Second question is I do need to build a form of BMS that can isolate these 12 batteries as if they were independant so one wont pull the charge out of the others. Is this a plausible project to take on?
Some ideas would be great.
Needing as much power storage as I can get I thought I would be able to hook these 12v gell batteries up in parallel, obviously knowing in some form the bunch of batteries I have wired together will be pulled down by the battery with the lowest capacity.
Anyways - I hooked them up to my solar controller and they went flat - didnt charge at all. Controller output was from memory 14v. Its enough to charge the 12 100AH deep cycle lead acid I have. So first question is any ideas why?
Second question is I do need to build a form of BMS that can isolate these 12 batteries as if they were independant so one wont pull the charge out of the others. Is this a plausible project to take on?
Some ideas would be great.