Minnesota Finds Net Metering Undervalues Rooftop Solar

Utilities should be paying more for their customers’ surplus solar power generation according to a solar pricing scheme approved by Minnesota’s Public Utility Commission last month and expected to be finalized in early April. Minnesota’s move marks the first state-level application of the ‘value of solar’ approach, which sets a price by accounting for rooftop solar power’s net benefits, pioneered by the municipal utility in Austin, TX.

Minnesota is one of 43 U.S. states that requires utilities to pay retail rates for surplus solar power that their customers put on the grid. Utilities across the U.S. are fighting such net metering rules, arguing that they fail to compensate the utility for services that their grid provides to the distributed generator. So last year pro-solar activists and politicians in Minnesota called the utilities’ bluff, passing legislation tasking the state’s Department of Commerce with calculating the true value of rooftop solar power. Continue reading

EC Sees Heavy Pricetag to UK Nukes Plan

UK prime minister David Cameron at Hinkley Point

UK prime minister David Cameron at Hinkley Point

Government incentives for a pair of proposed nuclear reactors could cost U.K. taxpayers as much as £17.62 billion, thus exceeding the reactors’ projected cost. The EC figure is a preliminary estimate included in an initial report to London published on Friday by European Commission competition czars. The letter notifies the British government that—as we predicted in December—Brussels is launching a formal investigation to assess whether the subsidies violate European state aid rules.

The preliminary findings suggest that the U.K. and E.C. are on a collision source. As the Financial Times summed it up this weekend: “The severity of [the EC's] initial concerns will cast a shadow over government hopes to win approval for the deal.”

Continue reading

AC/DC 101

Much of your editor’s reporting in 2012 focused on the re-emergence of direct current or DC power — through pieces in IEEE Spectrum, Technology Review, and Power & Energy Magazine — and there is more in the works. Some of you, however, may still be wondering what DC power is and how it differs from the alternating current or AC power flowing from most electrical sockets. So here are some answers.

The questions were posed by Andrew Huang, a 9th grader at High Technology High School in Lincroft, NJ, who recently interviewed me for a history project on Nikola Tesla and Thomas Edison’s late-19th Century War of Currents. (Check out The Oatmeal’s Why Nikola Tesla was the greatest geek who ever lived for a rather tilted yet entertaining take on a key combattant in this epic tech tussle.)

What are some differences between the physics of AC and DC? Continue reading

The Debate: Fracking and the Future of Energy

France 24 Energy in 2013 DebateThe Arctic is melting faster than predicted. Is now the time to shut down the low-carbon nuclear power plants in France — the 20th Century’s staunchest proponent of nuclear energy? Is natural gas produced via hydraulic fracturing or ‘fracking’ a gift that is buying time for a transition to renewable energy or a curse that reinforces fossil fuel dependence? Will carbon belching heavyweights such as the U.S. and China ever get serious about cleaning up their energy systems?

Such questions are top order in France, whose President kicked off a Grand Débat on energy this month Continue reading

The Inconvenient Science of Biomass Power

New science confirms that burning trees to produce power instead of coal may be a losing strategy for combatting climate change.

In my April 2012 Spectrum news article on the questionable carbon benefits of largescale biomass power generation, I identified a boom in exports of wood pellets from the U.S. Southeast to Europe, where they are fast becoming a crucial energy supply for power firms seeking to meet the European Union’s renewable energy and carbon reduction mandates.

Forbes Magazine greentech columnist (and friend) Erica Gies noted my analysis in a May 22 blog post, Massachusetts Addresses “Biomass Loophole” and Limits Subsidies, about recently-issued regulations that set higher standards for biomass power plants seeking state-issued renewable energy certificates. Continue reading

Electrical Upgrade Prescribed for Japan’s Crimped Grid

An advisory body for Japan’s powerful Ministry of Economy, Trade and Industry (METI) has endorsed a tripling of the capacity to pass power between Japan’s otherwise estranged AC power grids: the 50-hertz AC grid that serves Tokyo and northeastern Japan, and the 60-hertz grid that serves western Japan. This frequency divide hascomplicated efforts to keep Japan powered since the March 2011 earthquake and tsunami — a task that keeps getting harder with the inexorable decline in nuclear power generation (at present just one of Japan’s 54 reactors is operating). Continue reading

How Canada Should Return Obama’s Oil Pipeline Punt

Late last week President Barack Obama deferred consideration of the Keystone XL oil pipeline, designed to ship Alberta petroleum to the Gulf Coast, until after next year’s U.S. elections. Obama’s move immediately sparked vows in Canada to redirect crude exports to Asian markets less angst-ridden by the environmental impacts associated with tapping Alberta’s tough, tarry petroleum. A smarter strategy would be to reduce those impacts, starting with the black mark that brought Keystone XL to national attention: oil sands crude’s bloated carbon footprint. Continue reading