Deductions & credits

Can someone help me understand form 8911? I put in the cost of a Tesla HPWC that I had installed last year, but it keeps coming back as a $0 credit. Reading the limitations of the credit, I'm not sure why I'm not qualifying for the 30% credit. My tax liability was well over what the credit would provide. Is there something else at play here (or is this a TT math problem again)?