I was considering a Rolls 250Ah (20 hr rate) AGM battery bank. The Rolls suggested charge profile is attached. Note it starts with a constant current of 0.25*C20.
If I had three strings in parallel to obtain 750Ah, the charge current would be 188A, if I am doing things correctly. This would require multiple charge controllers - probably 3.
In the disadvantages/advantages of AGM batteries, I see that they can charge up to 5 times faster than FLA. The large current I am seeing would seem to be consistent with this.
Am I on the right track? If so - large wiring, large currents, and 3 strings in parallel. Not to mention a need to double the size of my solar array. Time to switch to FLA?
Don
If I had three strings in parallel to obtain 750Ah, the charge current would be 188A, if I am doing things correctly. This would require multiple charge controllers - probably 3.
In the disadvantages/advantages of AGM batteries, I see that they can charge up to 5 times faster than FLA. The large current I am seeing would seem to be consistent with this.
Am I on the right track? If so - large wiring, large currents, and 3 strings in parallel. Not to mention a need to double the size of my solar array. Time to switch to FLA?
Don
Comment