- Ebara Corporation Pumps & Compressors - Development of a micro combined heat and power (CHP) system for the Japanese residential market together with Ballard.
- PowerHeat Ltd - Offers a micro-combined heat and power system that uses a Toyota water-cooled engine and a patented heat recovery system, and a Deutz powered system with a larger electrical but a lower thermal output.
- PowerPlus Technologies GmbH - Ecopower - development of a micro combined heat and power system based on a reciprocating engine.
- Whisper Tech - The company carries out research and development of a micro-combined heat and power (CHP) system using a Stirling engine.
