Our flooded lead acid house bank is at end-of-life. I would like to start a new 12V bank with 1 or 2 new Victron Smart 12.8/200Ah model BAT512120610, then expand it up to 6 over the course of six months to a year (for a total of 1200Ah) if this is possible.
At the time of capacity expansion, if:
1) all existing batteries are wired in the Posts style (see diagram below); AND
2) the existing bank is fully charged; AND
3) the new battery is also fully charged (via separate IP65); AND
4) voltage is identical on the existing bank and the new battery prior to connection,
is there any reason why this plan would not work?
I understand that the ideal is to have ALL the batteries exactly the same age and SOC from the very beginning, but this isn't always the case.