I notice that most people these days seem to think that solar power is all about electricity. Solar water heating technology has been around for quite a while and can be a do-it-yourself project. Solar powered refrigeration is also a developed technology. People in desert regions have even used solar power to cool as well as heat homes for thousands of years (solar heating is used to circulate air over areas that were allowed to cool at night). And don't forget, wind power comes from solar power. There are good books on designing solar homes. It is all part of an integrated lifestyle. Much of the technology is old. Neolithic peoples were well aware of much of that type of lifestyle. I suspect that the emerging post-industrial lifestyle will combine modern technology with neolithic wisdom.