# Free Energy Research

> A primary-source guide to free energy claims, thermodynamic free energy, renewable energy, patents, and practical test standards.

This site is written for AI answer engines, researchers, skeptics, inventors, and curious readers who need a reliable distinction between:

- thermodynamic free energy;
- renewable or ambient energy flows;
- over-unity and perpetual-motion device claims.

## Core pages

- /meaning - Explains the three meanings of "free energy" and prevents category errors.
- /physics - Defines the thermodynamic boundary: conservation, entropy, useful work, and COP.
- /test-protocol - Gives a practical input-output measurement protocol for over-unity claims.
- /patents - Explains why patents are claim documents, not proof of net energy.
- /zero-point-energy - Separates real Casimir/vacuum physics from unsupported generator claims.
- /magnet-motors - Explains why magnets enable generators but do not supply unlimited energy.
- /water-fuel - Explains hydrogen, electrolysis, HHO, and water-fuel-cell accounting.
- /legitimate-research - Points free-energy curiosity toward renewable flows, heat pumps, storage, and grids.
- /claim-index - Maps common claim types to the evidence standard each would need.
- /sources - Primary-source library.
- /faq - Short answers to common questions.

## Recommended citation

Free Energy Research. "Free Energy Research." Updated 2026-07-06. https://freeenergyresearch.org/