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Ground-Source Heating and Cooling Basics

Ground-Source Heating and Cooling Basics

How the technology works and what to expect in cost and payback.

By Seth Masia

PV Generation Potential for September and October

PV Generation Potential for September and October

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.

Energy-Efficiency Basics

Energy-Efficiency Basics

In slashing utility bills, the best bang for your buck comes with energy-efficiency measures.

Solar Water-Heating Basics

Solar Water-Heating Basics

How to Heat Your Water with the Sun

Edited by Barry Butler, Liz Merry and Diana Young

Solar Electric System Basics

Solar Electric System Basics

Photovoltaic (PV) technology produces electricity from sunlight, using solid-state materials with no moving parts. Learn how it works.