Solar generator you can build..

The completed system works like this. A solar collector gathers sunlight and focuses it on a heat exchanger filled with water. The water boils and creates steam which spins the turbine. The turbine, coupled to the alternator, produces electrical power. This raw power is then regulated using a switching regulator circuit to produce a high current power source. This is DC, so a user would have to convert this to AC power to run household appliances.



http://www.xenotechresearch.com/solturb2.htm