Distributed Energy: Powering the Electricity Grid Together

Electric utilities’ concerns about distributed energy may result from them eyeing their bottom line more than considering the practicality and sustainability of home energy generation.

  • Solar Panels On Roof
    Distributed energy generation could strengthen the U.S. electricity system and relieve grid pressure during power outages.
    Photo by Fotolia/rob245

  • Solar Panels On Roof

“Distributed energy” refers to electricity generation from many small-scale (often renewable) sources tied into the grid to meet the power demand of local communities — such as solar arrays or small wind turbines powering individual houses. This network is contrary to the conventional energy setup of large, centralized power plants that transmit electricity up to hundreds of miles to consumers. As the price of solar power continues to plummet and more homeowners install renewable energy systems on their homesteads, locally produced, distributed energy is becoming a larger component of the electricity grid.

Distributed small-scale power producers could make the nation’s electricity system stronger if their output were combined with storage systems and load-management software, according to the National Renewable Energy Laboratory. This is because these small systems relieve pressure on the grid during peak hours and continue to produce during outages. An increasing number of small renewable systems feeding into the electricity grid makes for a complex web of new connections, and, in this sense, the electricity grid must get a lot “messier” in order for its energy to be cleaner and less concentrated.

Now, some electric utilities are claiming the grid is becoming too messy — and they’re working to block home energy generation. The utilities say the grid is too fragile to handle the burden of distributed energy. But former U.S. Secretary of Energy Steven Chu calls the claims “another bullshit argument,” and says solar installations won’t threaten grid stability until they approach 20 percent of the customer base. No state has neared that proportion, but that’s not stopping utilities from lobbying to repeal renewable-energy tax credits and abolish net-metering agreements between utilities and grid-tied homeowners seeking to sell their excess power back to the utility. For example, Hawaiian Electric Co., which operates in one of the most highly solar-powered states, has adopted policies that effectively halt solar installations. The company cites safety concerns even though less than 5 percent of its customers use photovoltaics.

The grid isn’t as burdened as these utilities claim, and renewable-energy proponents theorize the utilities may be attacking distributed energy to protect their profits rather than the integrity of the grid. It’s up to you to tell your state government that you support legislation allowing distributed energy. To get the facts, read the Department of Energy study The Potential Benefits of Distributed Generation.

Kale Roberts is an assistant editor of MOTHER EARTH NEWS magazine. His interests include renewable energy, real food and sustainable rural development. You can find him on .



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