How the technology works and what to expect in cost and payback.
By Seth Masia
This month we debut PV Power Map, where we present an updated report of national irradiance levels as illustrated by solar power potential for a recent month or two.
In slashing utility bills, the best bang for your buck comes with energy-efficiency measures.
How to Heat Your Water with the Sun
Edited by Barry Butler, Liz Merry and Diana Young
Photovoltaic (PV) technology produces electricity from sunlight, using solid-state materials with no moving parts. Learn how it works.