Gary decides $2023$ is his year to $"$go green." He purchases an electric car for $$30,000,$ and the battery qualifies for both parts of the clean vehicle credit. He spends another $$30,000$ on a solar system designed to generate electricity and to heat water for his vacation home. He does not own a swimming pool or a hot tub. What is the total amount of the credit$($s$)$ he may claim on his $2023$ return?

a$.$ $$9,000$

b$.$ $$16,500$

c$.$ $$7,500$

d$.$ $$30,000$