I have the 24V with a 100ah and a 200ah battery in series. I know it's unbalanced and a terrible bad idea but what are the consequences when the mecer starts charging? Wouldn't it stop once the voltage stabilizes at about 27.4v across the board or will it fry the battery that is only 100ah ...
I would so get away from that email address. There is no support and they losing legit emails because Telkom have blocked the entire ranges of other ISP's - some of which are running corporate MTA's (mail servers).
I don't think they that bad.
I have the older 2000VA unit which got given a dead short on the output and all it needed was a "hidden" fuse at the back replaced.
My Mecer 2400VA on the other hand was toast and half the trannies blown inside when the same thing happened.
So much for "Short...
From what i've read it's always good practise to have a breaker/fuse between battery banks.
If one battery goes wrong, develops an internal short or something, horrible things can happen. Especially true of banks in parallel.