Solar Energy Moves Toward Greater Relevance, Reigniting Old Debate

Transmission towers and lines cross a snow field in Oregon.

Energy.Gov / U.S. Department of Energy

Transmission towers and lines cross a snow field in Oregon.

Solar energy is one of smallest parts of our electricity system, but there are strong indications that could be changing.

“If you look at data on the growth rate of solar … it’s almost a flat wall in terms of a spike,” said Ryan Pletka, who works with infrastructure consulting firm Black and Veatch.

But, utilities aren’t all happy about this trend – in fact, many are fighting against it. That’s because more customers putting solar panels up on their rooftops means utilities will be selling less power to them. Additionally, in most states, utilities are actually required to buy any excess power those customers produce beyond what they are using at any given time, through a system called net-metering.

“That’s a concern,” said Xcel Energy Vice President of Policy and Staff Frank Prager. “That’s why we’re trying to address it today before it gets to be too big a concern.”

The rapidly increasing number of U.S. households that are installing rooftop solar panels is foreshadowing a wider debate over the future role of our traditional electric grid. Ironically, it is a debate that has already taken place.

In the 1880s, renowned inventor Thomas Edison was locked in a bitter battle with engineer and entrepreneur George Westinghouse over how this new invention of electric power should spread across the country, a battle commonly known as The War of the Currents.

Edison, who invented the very concept of electric power distribution, called for a decentralized, widely distributed power system with many  small power plants providing low-voltage direct current (DC) electricity to nearby homes and businesses.

Westinghouse, working with inventor Nikola Tesla, advocated the use of high-voltage alternating current (AC) from a centralized system of large industrial power plants transmitted out to a spiderweb of power lines connecting the entire country.

Westinghouse, AC and the centralized system eventually won out, and that’s more or less the model of the grid we have used ever since. It is a stable, reliable, cheap system, currently threatened by rooftop solar.

A little bit. Maybe. Eventually.

Studies are underway to determine how solar power can be used to a greater extent, including methods of integrating it to the larger grid, and in creating storage capacity so that it might  be used at a later time.

Inside Energy’s complete series, The Solar Challenge, can be found here.

3 thoughts on “Solar Energy Moves Toward Greater Relevance, Reigniting Old Debate

  1. “Solar energy is one of smallest parts of our electricity system”

    Hydroelectric is a form of solar energy and its contribution is NOT small. What you are really referring to is specifically photovoltaic.

    Biofuels could be a renewable source of feedstocks for existing fossil fuel based electricity generation. This solution to the climate change issue would require much less investment than physics based concepts such as photovoltaics, wind or H2 generation. Check out this URL for details:

  2. I really don’t think much of a debate is happening with those who matter, the consumers. The question is how the utility grid will transition into a system that will best suit solar and other renewables. Storage will need to be a big part of this strategy moving forward and some good technology is starting to be employed.

  3. “…creating storage capacity so that it might be used at a later time.”

    This would change the way energy is produced and used.  These technology driven advancements don’t bode well for the oil/gas industry – but the horizon is bright for any solar energy company.

    Keep up the great work Dan.

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