Category Archives: products/technical

Things that don’t work – Mick Sagrillo on the popular idiocies of modern small wind.

Posted on 22/01/2011 by hugh

This presentation by Mick Sagrillo is from 2009.  It’s a good summary of what is wrong with rooftop wind and is backed up by actual production data.  If you are enthusiastic about rooftop windpower then you ought to look at … Continue reading →

Posted in People, products/technical, Rooftop madness, wind systems tutorial | 4 Comments

Using the dump load to warm your toes

Posted on 08/12/2010 by hugh

For many centuries in Central Asia, a traditional home heating method known as a ‘Sandali’ or ‘Korsi’ has provided families with a warm place to retreat into when the temperatures dropped below freezing. The homes and buildings in this region … Continue reading →

Posted in developing world, People, products/technical | Leave a comment

Wind turbine controllers for optimising blade speed

Posted on 10/11/2010 by hugh

Efficient wind turbine alternators connected directly to batteries do not have the right speed range to make the best use of the blades.  Adding a controller that converts the voltage between the windmill and the batteries can improve performance (rather … Continue reading →

Posted in products/technical | 2 Comments