Can I parallel up several SLA batteries and charge at the same time?
Could be 20 SLA batts 7ah to 15ah I'm aware if not charging they will act as a load on each other.
If need be could do smaller batches just need to keep some batteries healthy.
There all SLA batteries and a go through a fair amount at work and my current process is just throwing a quick date on them when I purchase them but I'd still like to keep them 100%
At the moment when I put one into service I gotta wait for the unit to finish trickle charging it so I can force a battery test to clear the alarm.
I do carry 2 x CTEK 5A chargers that I can before installing but a lot of the time these end up "borrowed" out of my vehicle for other duties.
This suggests you can if they are all the same voltage: https://www.power-sonic.com/blog/how-to-charge-a-lead-acid-b…
Also read through this: https://batteryguy.com/kb/knowledge-base/connecting-batterie…