How Stirling Free Power Says It Works

Separate the vendor's marketing description from the underlying physics of a Stirling engine and generator.

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The underlying mechanism

The legitimate engineering chain is heat input → Stirling engine → mechanical work → electrical generator. The engine requires a hot side and cold side; it does not create energy from nothing.

The vendor's claims

The sales page markets its instructions as a way to build and scale a Stirling generator and makes substantial claims about household use and electricity-bill savings. HeatCraft Power has not independently verified those outcomes.

Before buying

Ask what continuous heat source is assumed, what measured electrical output is demonstrated, how cooling is handled, and what additional electrical hardware is required.