Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
EROEI is a measure of the amount of usable energy obtained from an energy source compared to the amount of energy invested to obtain it. It helps determine the efficiency and sustainability of different energy sources.