Yes, you would still be able to claim the Solar Tax Credit. Why does it take a year? Are they "paying" you for something like allowing them to use your home as a model home or something?
Assuming this is coming from the company itself as a manufacturer rebate and not as payment for services, you can only claim the amount you paid minus rebates for the credit. Since the rebate was not instant, you have 2 options.
The Residential Energy Credit is also a non-refundable credit, however this one can be carried forward to future tax years until this credit goes away which is currently set to happen in 2034
This credit is worth up to 30% of the cost of the equipment, with no maximum limit. The items that fall into this category are as follows:
This credit can be taken for new construction
To enter these credits into TurboTax take the following steps:
"When calculating your credit, you may need to subtract subsidies, rebates, or other financial incentives from your qualified property expenses because they're considered a purchase price adjustment.
Public utility subsidies for buying or installing clean energy property are subtracted from qualified expenses. This is true whether the subsidy comes directly to you or to a contractor on your behalf. However, utility payments for clean energy you sell back to the grid, such as net metering credits, don't affect your qualified expenses.
Rebates are subtracted from qualified expenses if all of these apply: