Retirement tax questions

It might be some misunderstanding here. It is not a manufacturer's incentive payment, which would be just essentially the discount for the purchase price. It is the payment for electricity sold back to the grid. So it would be natural to expect to offset this income by the cost of the installed equipment that is a must to generate this electricity (the equipment is the solar panels and/or batteries).
I'm participating in the same program and still waiting for my 1099. So I would greatly appreciate your clarification on this matter. Thanks in advance.