In article ,
"Dennis Pogson" wrote:

You have 220-volt batteries? WOW!


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Remove *nospam* to reply.

Hmmmm, Well, the answer to the OP's question, is that when the Stacking
cable is used to make 240Vac, it also sync's the two systems chargers
so that they can both charge the battery bank in tandem, without causing
any problems.

Me