Up to now, Kragten Design (KD) has developed 14 small battery charging windmills for which licences are available. More than 400 KD-reports and KD-notes about technical aspects of small wind turbines have been written. The reports which are public are given on a list of public KD-reports. Kragten Design has no web site but information about the reports, the windmills and KD-consultancy can be found on www.bidnetwork.org/person-42169-en.html For all the reports it is assumed that the reader has some basic knowledge of electrical, chemical and mechanical engineering.