Codes P0A94, C1259, C1310, B126A, B2784 Limpy Prius Help please

Ok so, I have been doing some reading here and just wanted to make sure I am on the correct tract. Wife driving on a hot as heck day (100+) up a mtn pass, just over pass, it lit up, multiple idiot lights including triangle and Hybrid malfunction notice on screen. Pulled codes on simple reader and it Pulled P0A94, came back immediately when cleared. Techstream found these other codes. I understand C1259 and C1310 are likely from the suspected inverter failure. B126A is a code for remote starter - I installed an aftermarket about a year about and it still works fine (supect this code would have come up after that installation ?) never checked with Techstream until now. The B2784 Smart Key, I was able to clear and I think has nothing to do with the current issue.

The Car will start and Idle and will kick in to charge the HV battery when the voltage gets in the 14 range and charge up to 17V range. Battery banks seem ok (less that 0.5V diff H/L bank), car will drive but depletes battery quickly and then super limpy. Regenerative braking seems to work, brakes feel normal and One of the on screen indicators show its charging when hitting the brakes. The main screen with the icons of the Battery, Generator do not show any activity with none of the moving arrows showing where the energy flow is going while driving or idling. The HV battery will charge and discharge when idling but the Gas engine does not shut off.
The 12V battery seems fine, it sits at 14.1 - 14.2 when idling.
With all this in mind - I just wanted to get some opinions... I am down to thinking its the inverter from everything I've read - Just the fact that it runs and charges throws me a bit. Fuses are good.
Car is rebuilt title so from what I understand the Toyota Warranty won't work.

Any suggestions greatly appreciated. Luckily used inverters are cheap. But I don't want to just throw parts at it if someone may think its something else

Thanks! in advance for any help!