Join Date: Aug 2006
Location: Arlington, VA
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Aside from the problems Maine mentioned -- which I agree with -- another problem I see is you'd be combining different types and sizes of batteries. Presumably, the start battery is much smaller than the combined house batteries, and it's near full charge always. Also, you could be combining different battery chemistries is you had, e.g., flooded house batteries and an AGM or gelled starting battery.
I agree with you re: the EchoCharge. It's a dandy device and is appropriate for most situations...much better IMHO than battery combiners, ACRs, and the like.
Let's pray that Xantrex doesn't fool with it's design or manufacture :-)