This review is for the original German version (a well-thumbed copy on my reference shelf).
I have been living off-grid with a 12 Volt system since 1995 and can honestly say that this book has been indispensable. A lot of the information applies to electricity, electronics, renewables and 12 volt in general, and can be viewed as an easy to understand basic course in those topics. This book first appeared in the German booklet series "Einfaelle statt Abfaelle", which loosely translates to "Ideas, not waste" (without the pun). In common with other booklets from that brilliant series, Michel's book inspires to be more self-reliant and creative, and to re-use, always keeping our beautiful planet in mind. The series is a perfect foundation course for any tinkerer, whether he/she drinks beer or anything else.