I've researched and haven't come up with any energy tax credit. I am linking you to the page on the TN DOR website that explains business deductions, exemptions and credits.
https://www.tn.gov/revenue/taxes/business-tax/deductions--exemptions-and-credits.html
*Please click the thumbs-up icon if this response was helpful.
**Please click "Mark As Best Answer" if your question has been resolved. Thank you.