Due to availability and not practicality, I am attempting to build an as large as possible battery bank from 16 AH AGM batteries.
The end goal is a large system that is charged with a solar system that is scalable for future upgrades, while also able to be grid charged. The inititial solar kit I'm planning to use is a 540 watt system including a 40 amp charge controller. The manufacturer informed me I would not be able to link more than 3 batteries in parallel on this 12v system, but general research hasn't been able to provide me with any reasoning for this other than uneven charging.
On a side note, I am considering using a bus bar system with jumper wires for each battery. If I opt to use this system it is my understanding that I create the option of easily monitoring individual battery voltages, as well as fuse each battery.
Highly motivated to move forward with this project but I would like to do so with a solid plan in place.
Thank you for reading, looking forward to input!