I think the idea of 'whole house' power from your truck is alluring, it's really probably out of most owner's reach, unless you have deep pockets and were planning on spending $10,000 on a Generac whole house generator already - yes, there's little 'info' about all of the requirements to make this work. From a 'sales' perspective, though, Ford has certainly made us ALL aware of the possibilities that this fantastic truck can give us, but EVERYONE is in a different home, with different wiring, with different codes, and with different budgets. When it comes to installing a system to allow for bi-directional flow of power, it's NOT very simple.
For instance, if you have a basic 100amp power service to your home, which is 240v service split over two 100amp breakers, giving you access to either 100amps of 240v power, or 200amps of 120v power, or in most cases a combination of the two, you are going to need a place for a double-pole 50amp breaker for this power to come into your home, which may be a problem of it's own if you don't have room. If you have to 'upgrade' your existing panel, chances are an electrician is not going to simply replace it with another 100amp panel, but are going to advise you that now you need to upgrade your whole service to 200amp - which might involve your utility company, a larger panel, etc. The wiring needed to go from the 80amp Pro Charger system to the home's panel will also need to be added, which will not be cheap, and may for some folks mean a LONG run of 240v heavy wiring. Also, since Sunrun is 'selling' this system, and even if you don't live in a state that they currently install in, you'll need to have your electrician purchase it from them, at THEIR price, and also pay your electrician to install all of this. If Sunrun's price is $5,000.00, I could easily see the electrician's cost to be similar, with time, labor, codes, permits, expertise, and the commodities involved.
I think I'll start by simply using extension cords from the truck into my home, if the worse case happens, and I doubt I'll ever see any real need to invest so heavily in such a 'what if' need. : )