### Question
What does renewable energy system mean?


### Answer
**Renewable energy system** has the following meaning in *7 U.S.C. § 8101*:

> a system that—


(i) produces usable energy from a renewable energy source

#### Citation:
  - *7 U.S.C. § 8101*
  - Heading: **CHAPTER 107-RENEWABLE ENERGY RESEARCH AND DEVELOPMENT**

