In order to avoid costs for AC panel upgrades, it makes sense for inverter manufacturers to provide power classes that get the most solar power on an existing customer's AC panel without upgrading it.
By Richard Valdmanis for Reuters: Rhode Island's Deepwater Wind began installing the foundations for North America's first offshore wind farm on Monday, a milestone the company says could pave the way for an industry long established in Europe but still struggling with opposition in the United States. The 30-megawatt wind farm, which will include five turbines located three miles (4.8 km) off the coast of the bucolic summer tourist destination of Block Island, will take more than a year to build and is scheduled to produce electricity for the tiny island community and the mainland by the end of next year. "Our belief is once Block Island is up and running, it will bring offshore wind from theory to reality in the United States and open up opportunities to build larger projects," said Jeffrey Grybowski, Deepwater Wind's CEO. Cont'd...
While other solar forecasting systems take more narrow location and timeframe views, what's different about the IBM approach is that we incorporate a great number of weather and solar energy prediction models. We then blend those using historical data as a function of weather situation, forecast horizon and location to create what we call a supermodel.
We're extremely close to reaching the point at which renewable electricity costs as little to generate as electricity from fossil fuels, so it's imperative that we don't take a backward step.
Brad Plumer for VOX: In the coming months, Hillary Clinton's campaign is planning to release a series of proposals for dealing with global warming. Her first installment is out Sunday evening, and it calls for a large increase in renewable power. Specifically, she's proposing to boost the amount of wind, solar, and other renewables so that they provide 33 percent of America's electricity by 2027 — enough to power every home in the country. Part of her plan would involve accelerating the recent rapid growth of solar installations nationwide. In her proposal, Clinton calls for US solar power to grow 700 percent from current levels. That sounds like an impossibly large number, but it's not implausible on its face. US solar capacity grew 418 percent between 2010 and 2014 (because it was starting from a small base). So 700 percent growth by 2027 is at least within the realm of possibility. But it would require additional policy changes — and clean energy prices would have to keep dropping. Cont'd...
The Nature Conservancy has completed its first phase of installation of SheerWind's INVELOX funnel-based wind power technology. Because Palmyra is home to a national wildlife refuge and more than a million nesting seabirds, conventional wind turbines were not an option due to the risk of bird strikes. What's more, the low wind speeds on the island would provide little to no energy production with traditional turbines. The Conservancy turned to the Minnesota firm SheerWind to design the system resembling an hourglass turned on its side. Extending 83 feet horizontally with a big wind scoop at one end, an exhaust on the other, a Venturi section in the middle increases wind speed potentially three to six times. Nets over the intake and enclosed blades keep it bird friendly. The first phase of the installation includes a single turbine inside the Venturi, allowing for two additional to be installed in the near future. The first phase of the INVELOX project is successfully charging batteries at night and on cloudy days to supplement the photovoltaic system also installed on Palmyra.
The current suggested guideline by the NRCA (National Roofing Contractor Association) for the installation of a PV system on a steep slope asphalt shingle roof as far as the flashing of the PV system stanchions, shows the metal flange to be applied underneath the roofing paper.
On July 20, SunEdison, the world's biggest renewable energy development firm, along with TerraForm Power, an owner and operator of clean energy power plants, announced the acquisition of Vivint Solar, a major supplier of residential solar systems in the U.S. The merger will be worth approximately $2.2 billion in cash as the two major solar companies acquire the residential solar firm. Additionally, SunEdison has agreed to enter a power purchase agreement with TerraForm Power. Roughly 523 megawatts of solar power will be installed by Vivint Solar by the end of 2015, which will now all be moved over to SunEdison. Through the $922 million power agreement, TerraForm Power will install the solar panels for residential solar protections through a "10-year average levered cash-on-cash yield of 9.5 percent," the release stated. Also, TerraForm Power will obtain future small commercial solar and completed residential projects from SunEdison's Residential and Small Commercial business unit. Cont'd...
Featuring the Cap-Rack™ System by DCE Solar
A team of researchers has come up with a solar cell that produces fuel rather than electricity. A material called gallium phosphide enables the solar cell to produce clean fuel hydrogen gas from liquid water. To connect an existing silicon solar cell to a battery that splits the water may well be an efficient solution; but it is very expensive. So, researchers were streamlining their search to a semi-conductor material that is able to both convert sunlight into an electrical charge and split water. The team found gallium phosphide (GaP), a compound of gallium and phosphide, useful in this respect. GaP has good electrical properties but the drawback is that it cannot easily absorb light when it is a large flat surface as used in GaP solar cells, said the study thatappeared in Nature Communications. The researchers overcame this by making a grid of very small GaP nanowires, measuring five hundred nanometres (a millionth of a millimetre) long and ninety nanometres thick. "That makes these kinds of cells potentially a great deal cheaper," said lead author Erik Bakkers from Eindhoven University of Technology, the Netherlands. Cont'd...
There have been enough successful low-income solar pilot programs at the state and federal level that it is now possible to launch a larger initiative with confidence that it can succeed.
AltEnergyMag.com has once again partnered with Intersolar to bring all the industry news and exciting new products to help our readers make sense of this key tradeshow. Here we have compiled a list of some product releases from this years show.
News and Product Announcements from InterSolar North America 2015
The use of a tracking system for a utility-scale project not only reduces LCOE, but also provides more usable power by broadening the power production curve to provide a smoother flow of energy from dawn to dusk.
PVWatts performs simplified PV system performance calculations using information about the array's geographic location, orientation, and a set of user-input loss factors
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Solar & Wind - Featured Product
Solar FlexRack's latest solar tracker technology bundles an advanced tracker design with a full team of seasoned engineering and installation experts at your service. The next-generation solar tracker delivers a package of features that both enable increased energy yields for commercial and utility-scale solar installations, and significantly reduce project risks. That translates to smart installation cost-savings across your project budget.