adeyo wrote:would it ever be possible to use a "Sunny Boy" sma inverter (the SB8000US accepts a dc voltage b/w 300-600 volts and spits out 240 volts AC) to power items in my home?
Yes, that should be possible, with the caveat that it's probably a grid-tied inverter and so would need to be connected to the grid to work - you can't just plug things into it on an "island" (but there are standalone inverters that can do this). I've thought of trying this with an old Leaf battery when they become available, if I can get my hands on one. You'd just have to access the main DC lines to the battery (which I believe you can find connected to the charger - but please don't mess with that if you don't know what you're doing). And I think the car would have to be on.
adeyo wrote:For that matter, one could theoretically use the sunny boy to charge the leaf directly via Solar Panels feeding into the inverter -just like a solar battery bank and then when needed, take that power back for home use during the night?
No, the sunny boy can't charge the Leaf directly. I suppose you could charge the pack directly by taking the DC from the panels through a DC-DC converter, to match the pack voltage, but that seems like a bad idea -you probably want some more sophisticated electronics (like a real charger than can accept DC input) to charge the battery instead of just a "dumb" DC-DC converter, but I'm not sure about this.
If you mean plugging the Leaf charger into the AC output of the sunny boy, again there's the grid-tied issue - since the inverter probably has to be connected to the grid anyway, plugging directly into the sunny boy output is indistinguishable from plugging in to any outlet in your home. And if you're talking about a standalone inverter, I'm guessing the Leaf's charger would not be happy with the wildly fluctuating power that would be produced by your solar panels, but again I'm not sure about that.
Anyway, the next question is why would you want to do this? With a grid-tied solar setup, it makes way more sense to charge your car from the grid when it's cheap overnight and sell power to the utility during the day with it's worth more (you should go on time-of-use metering if you haven't already). With a standalone solar setup, you're probably much better off using the equipment out there that's specifically designed for this purpose instead of "hacking" a Leaf and inverter to do it. Although I suppose you could use a Leaf battery in lieu of standard lead-acid batteries for such a setup, assuming the electronics will work with the pack voltage.