The latest annual data on US solar energy show how the technology options for residential and commercial customers keep progressing. Here are three important dimensions of that progress: photovoltaic (PV) modules keep getting more efficient, PV system costs keep coming down, and batteries are becoming much more a piece of the solar picture.
John's Latest Posts
November 25, 2019 9:23 AM EDT
November 14, 2019 4:10 PM EDT
The latest rankings for the most energy-efficient states are out. And the winners are…
ACEEE (the American Council for an Energy-Efficiency Economy) has released its 2019 state energy efficiency scorecard—its 13th edition. ACEEE’s annual release is always welcome, as a chance to take stock of where we are—where state leadership is—in moving along one of our most powerful tools for energy sector progress.
November 8, 2019 11:18 AM EDT
October 17, 2019 4:33 PM EDT
“Twistocaloric” cooling technology, spelled out in Science, is based on an amazingly simple concept: the property of materials—think rubber bands, for example—to heat up when stretched, and cool down when released. These innovations (and similar recent work on elastocaloric cooling) are aimed straight at the heart of a major consumer of electricity: Cooling for refrigeration and air conditioning account for a fifth of global electricity demand in buildings, and are poised for lots of growth. Any successful efficiency improvements in that sector could be huge, and with twistocaloric cooling we’re talking about systems potentially 20% more efficient than our current (vapor-compression) technology. Read more >
September 16, 2019 4:10 PM EDT
Climate change is serious. So are the tools we have for addressing it. Here are 5 images of clean energy progress to keep in mind. Read more >