Ok, so I hooked up the Tesla battery to the inverter and nothing exploded. EVTV and some dudes from Australia get all the credit for this crazy idea I have, and looks like the battery backup project will become a reality soon thanks to them.
-Next I'm going to wait for EVTV to release their controller for the Tesla modules so I don't overcharge/discharge the module and send it into thermal runaway.
-Attach the Clipper Creek LCS-15 to the inverter
-See if this setup will charge the FFE
-Find a good grounding point on the FFE with trunk access for the inverter and Tesla module.
-Put it all in my trunk and have a battery backup, with ability to charge where I want!
EVTV's latest episode: