Appropedia is a wiki for all questions of renewable energy, including:
- Solar power
- Solar hot water
- Photovoltaics (solar electricity)
- Solar thermal electricity
- Solar concentrators and dish/reflector design
- Solar cookers
- Solar water disinfection
- Passive solar design
- Wind power
- Hydroelectricity
- Microhydro
- Picohydro (relevant to international development and remote locations with very modest energy needs).
- Wave power
- Tidal power
...and any other form of renewable energy. It also covers energy storage, both high tech solutions that may (or may not) be suited to commercial and wealthy community solutions, as well as what is commonly called appropriate technology for smaller applications.
Other wikis exist on this subject; most are not active.
- Green Powered Wiki - defunct
Renewable Energy Wikia - little or no activity.
Appropedia is a more general green wiki, on the basis of "wiki synergy," i.e. that sustainability, design and international development issues overlap extensively and so are best dealt with on a single wiki.