Help! P0A93, cleared, drove 50mi, death

2005 prius, 142k
I drove to my weekly gig last night, which is 60 mi. After about 50 mi, suddenly many dash lights came on- red triangle, cel, several others. But the car was driving fine. I continued to my gig.

Afterwards, I connected my ODB scanner, found it had a P0A932 code (the only code). I cleared it, and proceeded to drive home. I got within 5 miles of my house, when suddenly I had lots of lights, and the car had no power- engine running, but no accel. I coasted to a parking lot.

It was doing very odd things- like not being able to power off. No RTOD
I have a voltmeter USB adaptor, and at one point it showed 3.3v. Then I recall it showing 13.4 v.
I tried unplugging the big battery connector, waiting, replugging. Same.

Then after quite a bit of messing around, it got into a mode where you try to power on, and all you get is breifly the 5 drive symbols showing only outline boxes. about 1/2 sec, then dark.

Called wife, got a ride home.

Today, I went back to it- thinking a bad 12v battery can do weird things, and connected jumpers from a running car to it. No change. I cannot get my ODB scanner to connect to the ECU, so I cannot scan or tweak. Maybe Techstream would let me.

So- I suspect initially I had an inverter pump problem, hence the P0A93 code.
Now, I don't know what state I'm in. I'm going to bring it home on a trailer and try to figure it out.

Help!
I'm uploading some videos and will post when ready.

 

13.4 v with the USB voltmeter, last I looked
I just got back from taking my truck and trailer there, and then I realized that it was in Park- and I couldn't get it into neutral to roll up onto the trailer. So, I guess I'll have to get it hauled home.

 

I went there this morning with a DVM and measured the voltage at the jump start terminal. 5.5v! Yikes.
I found the wire to the inverter pump and disconnected. Measured again- 13.1v!
I don't understand how the bad pump could pull that down to 5.5v and not deplete the battery- but it did somehow.
I tried to start, and I still got the boxes around the letters on the dash briefly.
Next, I checked the fuse that you mentioned (AM1?) - and sure enough, it was blown.
I put in a good one, and voila, it started up! Actually, the first time, it got into a funny mode- I was in neutral and couldn't get into drive or reverse. However, I powered off, and tried again, and I got to ready state. I drove the car home!
So- thanks again for the excellent info!
I have a new pump on order, and now I have that task to look forward to...

 

I also have a 2005 with 200k and a 2008 with 340k. If these have the original pump, I'm thinking I want to preemptively replace these. I guess I can call the dealer and they can tell me if the warranty pump replacement has been done at a dealer, I assume?