3027 Error

are we talking about the gen 1 in your profile?
I had the impression this car is newly aquired, as I reread I don't see how I got that thought. Though there is a lot a missing info that would help a lot.
Model year 2001?
How long have you / your daughter owned the car?
what tool being used to get and clear codes?
what was the inverter code?
and how fast does each code return or the check engine light come back on (if it's ever shut off) or how often the christmas tree of lights show up? actually if you have answers for all those questions you'll have a much better chance of getting quality answers from members who've been there already.

 

When the hybrid system is out of wack it tends cause other trouble codes to pop up. My experience is once the main battery is replaced with a good one, the other codes go away and don't come back.