Introducing the new Bishop Steam-to-Vacuum Engine which changes solar heat, or any available fuel, into usable power. The Bishop Steam-to-Vacuum (STV) Engine is powerful, economical, clean-running, computer-automatic and capable of nearly global solar operations. The STV engine can be used almost anywhere to: generate electricity turn gears rotate power belt wheels compress air conditioning refrigerants U. S. Patent Nos. 6,951,107 and 7,194,861.