Archive for November, 2011

A Small, Portable PV System for Camping, Emergencies, …

This is a nice, small, inexpensive, easy to build, very portable PV system from Kevin.  He uses it primarely for camping — lights, radio, charging cell phone…   But, it also would make a good power source to have around in emergencies, and a good project to learn something about solar electricity

A $1K Solar Water Heating System AND Open Source Differential Controller

A $1K Solar Water Heating System AND Open Source Differential Controller
Nathan did a really nice job of building and documenting his solar water heating system.

Recycled Bulk Milk Tanks for Solar Heat Storage

These tanks are made from stainless steel, and will provide a very long life. The tanks already include some insulation of some of the surfaces. The tanks are typically in the 300 to 500 gallon range, and the price of the used tanks is about $1 per gallon.