That was the one I meant. 9kw surge, too.
Didn't see the 9kw surge, yep, that'll probably handle the well pump and fridge compressor coming on at the same instant.
I think this issue of maybe the inverter can suck too much power out of the Leaf and possibly damage the DC-to-DC, needs more thought. Yeah, a certain resistance of wire can guarantee the current is limited; seems like there might be a better way though. My original idea of not connecting the surge battery to the Leaf at all, and rather connecting the AC-input of the big inverter to the Leaf via a small inverter, would more or less guarantee the current limitation. But then it requires a separate transfer switch on the essential subpanel. Seems awkward as hell.