Yes, it could work. But there is two things I dislike with the sunny boy. First, his price/watt who is quite high. I bet this is correct considering the quality and warranty, but there is the second point.... his dimensions ???
28.5x21x8'' Outch! Such a big inverter to have only 2000w. Compare with the INVT 2200w unit I wrote about few line upper, the SMA is two time bigger.
Considering that a good solution for me is to have the inverter permanently mounted in the Vanabolt to don't have to play/connect with 360vdc side, but only with 240vac, the SMA seem way to big.
Of course I can mount it in the house, but I don't like the fact to play with 360vdc extension cord and it remove the super nice thing to have a AC generator on wheels ?
Well, in fairness to me, this thread is under
not "Vehicle mounted systems"
7.7 kW Sunny Boy can be had for $1200 to $2000. Quite high?
The 2000W was only for convenience outlet, one 15A 120V outlet. Normal grid-tie operation up to 7.7 kW depending on model.
I was proposing this based on "But it's stupid to have PV and Inverter perfectly functional during a sunny day and don't have power at home because the grid is down.", not for V2H.
Obviously, the thing to do would be mount the Sunny Boy on the house and plug a DC wire into the 'bolt
Be sure to look into capacitor precharge/inrush limiters before connecting a lithium battery to an inverter.
For some people, using their electric car as backup AC source for the house would be useful.
Another type of system would have a battery inverter wired as UPS for the house, and AC coupled PV inverters. The large vehicle battery could be connected to an AC coupled inverter with suitable configuration (not PV MPPT). Surge currents would come from battery inverter, which might have AGM battery. The vehicle battery could feed through a smaller 2.5 kW inverter, called upon to only put out enough to keep AGM floating.
Would want a control system to recharge car when PV surplus was available.
Maybe 60 Hz to 60.5 Hz, 'bolt inverter ramps down from 100% to 0%. 60.5 Hz to 61 Hz, 'bolt charger ramps up 0% to 100%. 61 Hz to 62 Hz, AC coupled PV ramps down 100% to 0%