Welcome to ECN!.
You sound like you have a good working knowledge of Secondary Cell installations.
Don't get me wrong, mate, if these things only had water in them it wouldn't be an issue.
However, with the type of Battery I was talking about (Lead Acid type), I don't like the idea of being showered with fragments of battery body and Sulphuric Acid, should a short-circuit occur.
Which brings me to this rather dumb question.
Connect 10 12 Volt DC batteries in series, to give 120V, assume that each battery is 1Ah in capacity.
How would the PSCC compare to an AC supply and in fact what would the PSCC be?.
Would this current cause the individual cells to explode?.
And for an even sillier question, what is the best type of protection to use with a DC battery installation?.