Everything died while going down the road! Please help!

First off, please excuse the screen name, become a member on here many years ago when I sold Toyotas. Forgot I even had a profile here until I want to make one, for some help on my current car.

2007 Prius
Recently acquired it, he was selling because the dealership told him he needed a new AC compressor, and that the part of the inverter that controlled the AC, was going bad.
Put a salvage yard compressor on it, I know what I'm doing with AC, while. Instant air-conditioning.
Ordered an inverter...had some issues with the condition of the one I received, so I was sent to another one, low mileage off of 2009. It arrived the other day...
That night...I was Driving down the highway, cruise control shut off, VSC parking brake red triangle lit up on the dash. Within two minutes I lost all power. Except the 12v power. All lights horn lock turn signals hazards work. Dead screens nothing when I hit the power button.
12 V battery is a 2y/o correct replacement, and shows 12.59v , the fusible link shows 12.58v, at both ends.
I was very hopeful, that it was the inverter, since when I pulled the lid off the old inverter, it just smelled like burnt electric and ozone .
I just got done replacing the inverter, on the side of the road and 95° weather, but it was not fun. Needless to say, I wouldn't be posting, if that had done the trick. Still nothing when I hit the power button.
PLEASE HELP
It's on the side of the road 80 miles from my house. And I'm worried that it will be towed away, with all the holiday traffic.

 

That was intentionally long , to detail what happened, as well as illustrate that I have addressed all the usual suspects...
THANKS AGAIN!

 

Normally I would say yes I am, however the car broke down your Fairplay, on 85, near the Georgia border.
The car is on the side of the road, for the night, as I have to go to work in Spartanburg. I will check that fuse when I go back to it in the morning. This is what I was looking for, further ways to diagnose it. Sidenote, I replaced the inverter pump also on the side of the road. I had everything ready to go,
perhaps in the morning on my way back to the car, I will stop at a junkyard, that I know has a Prius in it. And grab a couple of fuses.

 

I've only owned the car for a few thousand miles . Even though the car was well maintained mechanically, since the inverter was being replaced, I went ahead and had already bought a new OE Toyota pump .
I've also already changed the oil/filter, plugs, transaxle fluid. My new VVT oil control valve comes tomorrow (was getting P0011 codes)
I know well-maintained, they will go 500,000 relatively easily, that is my goal. I have the mechanical knowledge , just the hybrid part is little tricky and new

 

AAA? Isn't it bad enough I drive a Prius? LOL
I wish I had AAA right about now

But I'm guessing it has to be that fuse, or similar. there is some sort of failsafe, that went out. It was all just too sudden, and I really think the inverter took a dump on me. Like I said, it smells bad . I'm sure those of you who have experience with electrical know exactly what I'm talking about.

 

I've been looking for an old laptop, was going to get techstream, and monitor things
But that helps me not one bit right now, since there is no power...
Any other suggestions, as to why the HV part of things shut down? Or any other things to troubleshoot

 

12V works fine.done lights etc...aks, hazards

The only way I have ever been able to get 12v per to the OBD2 port is with the POWER ON (ready etc)

 

I've never seen a car where the OBD power isn't switched power (key on)
I'm an ICE car this means turning the key to accessory
the few times I have had the prius scanned. I had to have the car basically "running" (READY)

 

Eric,
As mentioned above, that's the plan in the a.m.lol
the multimeter is already in the car,
Like I said, I'm going by junkyard in the morning, where they have a Prius. I'm going to grab every fuse and relay I can, of fthat thing and just checking I guess when I get there. Any other suggestions if it is not that fuse?

I REALLY apprecall the input

 

NOTHING happens when I push the power/start button.
Door open, security, hazards, on cluster light up
key "slot" is lighted, all dome/courtesy lights work, SKS/power locks work

Just driving down the highway, suddenly, the typical, "oh man, this can't be good" array of warning lights on the display, and then BAM! NOTHING! Dashboard and MFD went black no power, I managed to after/coast to the side of the road.