### Question
Can you define what renewable energy system means?


### Answer
**Renewable energy system** is defined as the following in *15 U.S.C. § 636*:

> a system of energy derived from—


(aa) a wind, solar, biomass (including biodiesel), or geothermal source

#### Citation:
  - *15 U.S.C. § 636*
  - Heading: **CHAPTER 14A-AID TO SMALL BUSINESS**

