Calculating Solar Energy’s Land-Use Footprint

New Hampshire, USA — New statistics from the National Renewable Energy Laboratory (NREL) reveal exactly how much land is needed to site a solar plant of various sizes and technologies, based on actual plants and projects and not models or projections. The takeway: your mileage may vary.

NREL’s previous estimates and calculations of solar energy’s land-use requirements, published several years ago, suggested that it could meet the U.S.’ total electric demand (circa 2005 levels) with a footprint of about 0.6 percent of the nation’s total land area, or somewhere around 14-15 million acres.

Now, though, NREL has pooled data from more than two-thirds (72 percent) of solar photovoltaic (PV) and concentrated solar thermal (CSP) power plants already installed or being built across the country, as of 3Q12 data from SEIA: 2.1 GW (AC) of generation capacity and 4.6 GW (AC) under construction. Not surprisingly, they determined the required footprint varies widely depending what solar energy technology is applied, weighing between and how one calculates the “direct impact” (physical infrastructure development) vs. “total” area impacted including the surrounding land.

Written by James Montgomery. To read the full article, click here.

Solar Energy Battery Backup Under Attack in California?

CHICAGO — California is no stranger to rolling blackouts. When Charles and Elke Hewitt installed a solar electric system with batteries for emergency backup power on their home this April, they were shocked when Southern California Edison rejected their application for grid connection under their net metering program. And the Hewitt family was not alone. Soon all homeowners with solar electric systems with battery backup in California could be affected by Edison’s stance on backup power.

Edison informed the couple their application for grid connection was denied because the batteries they used to store energy for emergency backup power when the grid went down were considered “power generators” and not energy storage devices, said Charles Hewitt. Edison said Hewitt did not qualify for their net metering program because the utility could not distinguish between power produced by the solar panels and power produced by the batteries, which it considers a nonrenewable source of power, he said. Edison explained their policy had not changed. It was the equipment that had changed. Members of the solar industry refute Edison’s position.

Written by Lauren Poole. To read the full article, click here.

German Green Energy Bluster Running Out Of Wind

Although blades on the 150-meter wind turbines at the new German offshore Riffgat power plant nine miles off the North Sea island of Bokum are finally turning, there is one big problem. They are doing so only because they are being powered by onshore fossil-fueled generators to prevent the rotors from corroding in salty air. And why might that be? Well although they otherwise function perfectly, the underfinanced grid operator hasn’t yet connected a power line because of problems attracting investor financing. Prospective investors attribute their reluctance to a lack of market confidence.

While half a dozen wind farms are still being built in the North Sea, there are no follow-up contracts. As Ronney Meyer, managing director of Windenergie Agentur (EWE) based in the northern port city of Bremerhaven said, “The market has collapsed.” EWE developer Riffgat reportedly doesn’t plan to invest in any more offshore turbines.

There is little mystery regarding a clear lack of clamor for wind in the energy marketplace. Namely, taxpayers and ratepayers are recognizing that the subsidy-dependent and performance-costly industry makes no economic sense.

Written by Larry Bell. To read the full article, click here.

Hydropower: the unsung hero of renewable energy

Hydropower accounts for more electricity production than solar, wind, and geothermal combined, but gets far less press because it is a mature technology with a much lower annual growth rate than most renewables. Still, hydropower will likely continue its leading role as the world’s most important producer of renewable electricity until well into the next decade.

This is the 2nd installment in a series that looks at the recently released 2013 BP Statistical Review of World Energy. The previous post – Renewable Energy Status Update 2013 – focused mainly on wind and solar power. This post delves into hydropower and geothermal power. Some of the BP data is supplemented by REN21′s recently-released 2013 Renewables Global Status Report (GSR). (Disclosure: I have been a reviewer for the GSR for the past three years).

Hydropower

Hydropower accounts for more electricity production than solar PV, wind, and geothermal combined. In 2012, hydropower accounted for 16% of the world’s electricity production. However, hydropower gets far less press because it is a mature technology with a much lower annual growth rate than most renewables. While solar PV increased capacity by an average of 60% per year over the past 5 years, new hydropower capacity increased at a much more modest annual rate of 3.3%.

Written by Robert Rapier. To read the full article, click here.

The Fundamental Limitations of Renewable Energy

Many people still think that it will not be long before renewable energy such as solar and wind becomes outright cheaper than fossil fuels, thereby leading to a rapid expansion of the thin orange slither in the graph below. This is an ideologically very attractive notion, but, as discussed in this article, it is questionable whether this is in fact physically possible.

So, what does renewable energy have to accomplish before it can compete with fossil fuels in an open market? Well, in short, we will have to overcome the diffuse and intermittent nature of renewable energy more efficiently than we can overcome the declining reserve qualities and unrefined nature of fossil fuels.

In other words, renewables need to overcome the following two challenges in order to displace fossil fuels in a fair market:

Solar panels and wind turbines need to become cheaper than raw fossil fuels. This is the challenge posed by the diffuse nature of renewables.
Storage solutions need to become cheaper than fossil fuel refineries (e.g. power plants). This is the challenge posed by the intermittent nature of renewables.

Written by Schalk Cloete. To read the full article, click here.

Japan Solar Energy Soars, But Grid Needs to Catch Up

Hokkaido, Japan’s second largest and northernmost island, is known for its beautiful wild nature, delicious seafood, and fresh produce. Now another specialty is taking root: Large-scale megasolar power plants that take advantage of the island’s unique geography.

A new renewable energy incentive program has Japan on track to become the world’s leading market for solar energy, leaping past China and Germany, with Hokkaido at the forefront of the sun power rush. In a densely populated nation hungry for alternative energy, Hokkaido is an obvious choice to host projects, because of the availability of relatively large patches of inexpensive land. Unused industrial park areas, idle land inside a motor race circuit, a former horse ranch—all are being converted to solar farms. (See related, “Pictures: A New Hub for Solar Tech Blooms in Japan.”)

But there’s a problem with this boom in Japan’s north. Although one-quarter of the largest solar projects approved under Japan’s new renewables policy are located in Hokkaido, the island accounts for less than 3 percent of the nation’s electricity demand. Experts say Japan will need to act quickly to make sure the power generated in Hokkaido flows to where it is needed. And that means modernizing a grid that currently doesn’t have capacity for all the projects proposed, installing a giant battery—planned to be the world’s largest—to store power when the sun isn’t shining, and ensuring connections so power can flow across the island nation.

Written by Yvonne Chang. To read the full article, click here.

White House solar panels being installed this week

After nearly three years, the White House began installing solar panels on the First Family’s residence this week, a White House official confirmed Thursday.

The Obama administration had pledged in October 2010 to put solar panels on the White House as a sign of the president’s commitment to renewable energy.

The White House official, who asked not to be identified because the installation is in process, wrote in an e-mail the project is “a part of an energy retrofit that will improve the overall energy efficiency of the building.”

At the time of the 2010 announcement, then-Energy Secretary Steven Chu and White House Council on Environmental Quality chair Nancy Sutley said the administration would conduct a competitive bidding process to buy between 20 and 50 solar panels. The officials did not identify the supplier or cost of the project, but wrote the White House “has begun installing American-made solar panels” and the initiative, “which will help demonstrate that historic buildings can incorporate solar energy and energy efficiency upgrades, is estimated to pay for itself in energy savings over the next eight years.”

Written by  Juliet Eilperin. To read the full article, click here.