I have on my boat 2 banks of 900Amp Lifeline AGMs. At present I am using them as one bank of 1800 Amps.
These 2 banks are charged by 2 X Quattro 12/5000/120 from shore power or a 11KVA generator and a little solar power. This is monitored by 3 BMV712 Smart battery monitors and there is a color control in there as well which I use to see SOC etc. This color Control; is also hooked up by wifi to the installers who have been monitoring the situation.
Each battery bank has it's own BMV and then there is a Service Master that monitors both.
I have had a number of issues which have not been resolved by the yard that put them in or the distributor.
Firstly the quattros go straight into Absorption mode rather than bulk, Maybe this is not too important as they are timed to be in this state or 4 hours which is plenty long enough with my charging capacity, BUT what is annoying is that they start charging at 400Amp but quickly drop to 300 then 200 then 100. Result is over an hour they will only actually charge at 220 Amps. Lifeline batteries are designed to take max charge up to end of absorption mode, it's bad for them not to do this.
10 days ago the quattros and I think the BMV's were updated with new firmware. A result of this was that the BMV's are now not synchronised,
the service master is reading 20% less than the other 2. they were the same prior to the update.
However at least the quattros are not charging at Float rates before even when batteries were at 60%. That was a nightmare.
Which % do I base my charging on. How do i get this resolved it has been going on for months.