
The investment tax credit (ITC) helps reduce installation costs and The ITC was recently extended for three years and delayed by two years, to 2020. The investment tax credit phase-down will be at 10 percent in 2024. Some states also offer additional incentives to make the transition to renewable energy. For example, the state of California offers a 25 percent investment tax credit for solar panels, wind turbines, and geothermal systems.