Solar tax credit for rental property - "Residential" or "Non-residential credit"

Hello,

I installed solar panel in our second home that we also rent short term with Airbnb. I am struggling to find the best way to claim the energy credit. There seem to be 2 options, option 1 does not allow me to claim the full credit, I found a 2nd option in TT forum, but it is not completely clear to me if it really applies to my situation:

1- "Credit for Residential Solar Energy": Because I also use my rental property for personal use, I can claim the "residential solar credit", BUT the amount will be prorated to the time we occupied the house during 2021 - TT Premier fills form 5695 but does not account for the prorated part, and gives me full credit (which is wrong).
2- I have seen mentions of another option, the "Non residential energy property credit - IRC Section 48 - (Form 3468)". TT Premier is not helpful at all here, I cannot find form 3468 in TT Premier.
After a lot of reading, I still cannot figure out if IRC Section 48:
a- Can be claimed by a "non-business" entity (I own the house, it is not owned by a LLC, S-corp...)
b- Can be claimed even if the property is not rented 100% of the time, we partially use it as a 2nd home

 

I hope this rings a bell and someone will be able to provide some guidance.

Thank you,

Chris