Answer: As promoting a government policy to use alternative energy sources.
Explanation:
A tax credit is a form of tax incentive which can help in the reduction of the amount of money that a taxpayer is owing the government. Here, the taxpayer can just deduct the tax credit from the total amount of taxes that the individual owe thereby leading to him paying a lower amount as tax.
In this case, allowing tax credit for certain solar energy property may be a way the government wants to make people start using other forms of energy. Giving tax credit will lead to a cheaper price for the solar energy products.
