I have two battery banks of different sizes, the first supplying a DC panel with 2 X 100AH gel batteries and a Skylla 24VDC 50A charger, the second supplying a DC panel with 8 X 100AH gel batteries and a Skylla 24VDC 100A charger.
Coincidently, the larger of the two banks has the least working load at 17A and the first and smaller bank has a larger working load at 22.5A.
There is a consumer which is supplied a main supply from the first panel and a backup from the second panel. Both supplies are terminated and "on" at the same time through separate breakers. When I measure the DC discharge current at this consumer at each breaker I thought I would see an even load as the end consumer load is the same but this is not the case. The higher capacity battery bank and charger is supplying this consumer with 11A and the smaller capacity battery bank and charger is supplying the same consumer with 6.5A.
The only conclusion that I can infer from the tests I have done is that the larger capacity bank will supply the load unevenly and greater than the smaller capacity bank. Could someone confirm that, possibly show a formula that one could calculate these differences?