- CoGenerators by Steve Krug
- Next Step Energy Systems
- 30497 Chippewa Trail
- New Auburn, WI 54960
- 414-293-4628
- Free Piston Stirling Engines and coolers - using wood to generate electricity
- Lyn Bowman, Sunpower, Inc.
- PO Box 2625
- Athens, OH 45701
- email: info@sunpower.com
- Phone 740-594-2221
- FAX 740-593-7531.
Offered by John.