<p>Technologies like solar electric property, residential solar water  heating, qualified small wind energy, and qualified geothermal heat pump  energy, among others, are all eligible for this tax credit when  purchased and installed between January 1, 2009 through December 31,  2021.</p>
<ul>
<li>2009-2019 | Save 30% federal tax credit</li>
<li>2020 | Save 26% federal tax credit</li>
<li>2021 | Save 22% federal tax credit</li>
</ul>
<p></p>


Technologies like solar electric property, residential solar water  heating, qualified small wind energy, and qualified geothermal heat pump  energy, among others, are all eligible for this tax credit when  purchased and installed between January 1, 2009 through December 31,  2021.
2009-2019 | Save 30% federal tax credit
2020 | Save 26% federal tax credit
2021 | Save 22% federal tax credit


What is the tax credit percentage by year?