Right now the 5kva version is
Right now the 5kva version is $2600 plus say $400 to install that box (2HR job). Compared to a Honda generator the can do 5000w continuously it’s not a bad deal. The Honda costs $2500. During a multi day power outage you are looking at adding fuel 3x a day and burning more than 13 gallons of fuel a day. With a hybrid you do not burn fuel while idle (engine shuts off) the engine runs at full volumetric efficiency and if you have a plug in hybrid the engine won’t even start for 6-24 HRs maybe more. My i3 REx lasted 2 days before the engine turned on but it has a very large battery and I was only pulling 1000-2000 watts at any given time.
All that said if your average needs are below 1500 watts then you don’t need this system. You can buy a 2000-4000w inverter and wire it to your 12V battery. Anytime you go above the ability of your vehicle DC-DC converter you will draw from the 12V battery anytime you are below your DC-DC ability your 12V will charge. Most DC-DC are 1400-2000 watts usually 1500-1800w
But if you need 5kw then no generator can compare to it. It’s safer, quieter, more reliable, easier to move, holds more fuel, is 2-10x more efficient, and has some battery storage if it’s plugged in.
This systems cost reflects s situation where it costs much more than the sum of its parts.
They are offering a nearly turn key solution. If you know what you are doing you can do this on a $1000 budget. But you wouldn’t have that neat little safe disconnect box!