General information about solar technology:

How it works (https://www.energy.gov/eere/solar/solar-photovoltaic-technology-basics)

Xcel Energy's Solar Netmetering Program (https://co.my.xcelenergy.com/s/renewable/net-metering) Overview of the Xcel Energy program for solar installations

EnergySage Guide to Clean Energy Solutions (https://www.energysage.com/) scroll over the tips and guides at the top of the page for the complete overview