I replaced my roof because I installed solar panels, can I get a tax credit for the roof?

[Mike9241]

The following expenses are included:

• Solar PV panels or PV cells used to power an attic fan (but not the fan itself)
• Contractor labor costs for onsite preparation, assembly, or original installation, including permitting fees, inspection costs, and developer fees
• Balance-of-system equipment, including wiring, inverters, and mounting equipment
• Energy storage devices that are charged exclusively by the associated solar PV panels, even if the storage is placed in service in a subsequent tax year to when the solar energy system is installed 
• Sales taxes on eligible expenses

replacing the roof isn't on this list.

[Opus 17]

If you must replace or improve the roof before you can install the solar system, that cost is not eligible for the credit.  It adds to the cost basis of the home, which may reduce your capital gains when you sell.