Impact of a 12V tap off a 48V battery string
I have two banks of 4, 12V AGM batteries powering my XW6048 for a total of 48V, 110Ah.
If I tapped off of one of the 12V batteries to power a 12DC lighting circuit, would there be any detrimental impact to the string in general? Since the batteries are in series, but I attached the lighting circuit to only one battery, I'd have 12V output to that circuit, but in that case, wouldn't all 4 batteries in the string contribute as though they were in parallel? (actually, both 4-battery banks would contribute) For that 12V circuit, would I now have 440 Ah (8, 55Ah 12V batteries)?
XW6048, 3.4KW PV, Grid-Tied, always tweaking.