### Question
What is the definition of spinning reserve services?


### Answer
The definition of **spinning reserve services** is as follows in *42 U.S.C. § 17231*:

> a quantity of electric generating capacity in excess of the quantity needed to meet peak electric demand

#### Citation:
  - *42 U.S.C. § 17231*
  - Heading: **CHAPTER 152-ENERGY INDEPENDENCE AND SECURITY > SUBCHAPTER V-ACCELERATED RESEARCH AND DEVELOPMENT > Part D-Energy Storage for Transportation and Electric Power**

