Sidebar by Slim Wolfe
Solar Energy – January 2003 – Colorado Central Magazine
Some basics about photovoltaic and other power systems
Do solar panels work under a cloud? Yes, but slowly: allow about twice the time as you’d need on a sunny day.
What about wind generators? They’re best when mounted on a 40-foot pole or tower, above ground turbulence. They vibrate and can be quite noisy, and your tower must be anchored and guyed. There are many models, starting at about $600 (for a roof-mounted unit supplying about 400 watts, which is suitable for supplemental power to a solar system), and additional gear may be required.