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September 17, 2013
Revolution Now: The Future Arrives for Four Clean Energy Technologies

Editor's note: This report was updated in October 2014. To read the most up-to-date version, visit the Revolution Now 2014 page.

September 16, 2013
Clean Tech Now

Falling costs for four clean energy technologies -- land-based wind power, solar panels, electric cars and LED lighting -- have led to a surge in demand and deployment.

September 5, 2013
New Study Shows Solar Manufacturing Costs Not Driven Primarily by Labor

Production scale, not lower labor costs, drives China's current advantage in manufacturing photovoltaic (PV) solar energy systems, according to a new report released today by the Energy Department's National Renewable Energy Laboratory (NREL) and the Massachusetts Institute of Technology (MIT).

August 21, 2013
Solar Classroom Update: Making Clean Energy Upgrades a Back-to-School Priority

From solar installations to air sealing, a guide to investing in clean energy upgrades for schools.

August 21, 2013
Solar Energy Resource Basics

Solar radiation, often called the solar resource, is a general term for the electromagnetic radiation emitted by the sun. Solar radiation can be captured and turned into useful forms of energy, such as heat and electricity, using a variety of technologies.

August 20, 2013
Concentrating Solar Power Tower System Basics

In power tower concentrating solar power systems, numerous large, flat, sun-tracking mirrors, known as heliostats, focus sunlight onto a receiver at the top of a tall tower. A heat-transfer fluid heated in the receiver is used to generate steam, which, in turn, is used in a conventional turbine generator to produce electricity.

August 20, 2013
Concentrating Solar Power Dish/Engine System Basics

The dish/engine system is a concentrating solar power (CSP) technology that produces relatively small amounts of electricity compared to other CSP technologies—typically in the range of 3 to 25 kilowatts. Dish/engine systems use a parabolic dish of mirrors to direct and concentrate sunlight onto a central engine that produces electricity.

August 20, 2013
Concentrating Solar Power Basics

Concentrating solar power (CSP) technologies use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat. This thermal energy can then be used to produce electricity via a steam turbine or heat engine that drives a generator.

August 20, 2013
Flat-Plate Photovoltaic Module Basics

Flat-plate photovoltaic (PV) modules are made of several components, including the front surface materials, encapsulant, rear surface, and frame.