Repairs are not tax deductible, they are part of the normal routine of ownership.
Improvements are not deductible, but they add to the cost basis of the home. That may reduce your capital gains when you sell. Improvements add value to the property or extend its useful life, while repairs restore the property to as-is or as-was condition. There is a discussion of repairs and improvements here.
https://www.irs.gov/forms-pubs/about-publication-523
Keep records of the cost of improvements as long as you own the home.
Certain improvements may qualify for a tax credit if they meet the required energy efficiency standards. This would apply to windows and the heat pump (maybe, if they meet the required standard). There is a separate credit for installing a solar system provided that it supplies electricity to a dwelling (a place where people live)--solar panels that provide power to a barn, shed, or that feed into the grid without being part of the house are not eligible.)
Instructions for the energy credits, including how to tell if the items you installed qualify, is here.
https://www.irs.gov/forms-pubs/about-form-5695
