Clean Power Ivanpah Solar Electric Generating System passes first sync milestone.

Published on February 6th, 2014 | by Guest Contributor


Is Ivanpah Online?

February 6th, 2014 by  

By Christian Roselund

A number of media reports have stated that the massive Ivanpah solar thermal electric plant in California’s desert has recently come online. The truth is more complex.

Ivanpah Solar Electric Generating System passes first sync milestone.

On February 5th, 2014, California hit another record for peak generation of large-scale solar, reaching 2.378 GW at noon. This is 230 MW more than the last record in early January, and led me to speculate that we were finally seeing output from the 377 MW of net capacity at the massive Ivanpah solar thermal electric plant.

In previous days, publications including Think Progress had put out big headlines stating that Ivanpah, the world’s largest solar plant, had finally come online. But digging a little deeper into data from the California Independent System Operator (California ISO) shows that this is an overstatement at best, and misses the complex commissioning process that the plant has undergone. It turns out that the big jump in power on February 5th was mostly solar PV, and as I write this, Ivanpah’s three units are still not producing full power for the grid.

That is not to say that the plant is producing no power. Ivanpah began its first test production of power from unit 1 last September, and has since synched the other two units to the grid.

Digging Deeper

How much power at this time? It is likely that only owner NRG, technology supplier Brightsource, construction contractor Bechtel, California ISO, and utilities buying the power know. Brightsource and NRG aren’t saying, and as they are holding a commissioning ceremony on February 13th, 2014, they are keeping silent in the interim.

California ISO does show a big increase in output from solar thermal electric plants for the first five days of February, which could also lead observers to believe that Ivanpah has come online. And this would be proof, except that there are other solar thermal electric plants (also called CSP or concentrating solar power) plants in California, including the 354 MW Solar Electric Generating Systems (SEGS), the first large-scale CSP plants to come online in the world in the late 1980s and early 1990s.

To further complicate matters, January ISO data shows practically no CSP output during nearly all days in January 2014, meaning that neither SEGS nor Ivanpah were what we would call operational.

Operational or Non-operational?

California ISO does provide more clues to this mystery. The organization keeps a list of “curtailed and non-operational” power plants, and Ivanpah’s three units have been on this list for months. During four of the first five days of February, at least one unit was listed as fully curtailed or non-operational, and the other two partially curtailed.

The position of the three units have switched on this list. On February 2nd, it was unit 2 that was fully off-line, with the other two partially restricted; and on February 3rd, 4th, and 5th, unit 3 was fully off-line. On February 1st, all three units are listed as only partially “curtailed or non-operational.”

So in the end, we simply don’t know how much power is being produced by Ivanpah at this time. It is likely that as the units ramp up for full production, one or the other is being taken off-line for technical tweaking.

I’m willing to wager that construction contractor Bechtel and Brightsource are making one Hell of an effort to get everything up and running for next week, when Energy Secretary Ernie Moniz flies out from DC for the big unveiling. Around February 13th, 2014 we are likely to see a big jump in solar power output in California.

Or not.

christianAbout the Author:

Christian Roselund writes daily news and analysis of the global solar industry for trade publication Solar Server ( He also writes about the media, environmental issues, politics and US history, and keeps a blog at He can be found on Twitter @croselund.


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  • Arik Ring

    Do people really expect that you push a button and thousands of heliostats, pipes, pumps, turbines, generators, computerized systems, switchgear and what have you would immediately come online?

    I have been commissioning less gigantic CSP power plants for over a decade, it was always a challenge, even with just one solar tower at a time.

    Considering the magnitude of this, largest ever solar thermal plant, it should take quite a few weeks, that is not unordinary!

    I am confident that the EPC contractor together with BrightSource Energy would work out the problems, and Ivanpah would supply the grid with reliable, clean, green solar electricity!

    • Bob_Wallace

      Seems like new nuclear reactors take a year or so before the fine tuning is complete and they start working at “normal” capacity factor.

      For a first of a kind system to take a few months to get dialed in, should be expected.

      But, that aside, welcome.

      Are you willing to contribute to our knowledge about CSP? Most of us are hungry for new information about renewable energy. We aren’t a sophisticated group, this isn’t an “insider engineer” site. More of a “person on the street” place with an interest in getting rid of fossil fuels.

      • Arik Ring

        Thanks Bob!
        I really appreciate your input!
        You are more than welcome to follow me on Twitter:

        I strive to give my personal perspective as a veteran in the solar industry.

        On some programs I have being working on I cannot write due to confidentiality wishes of my clients.

        I hope to make a small difference and assist to shift course from fossil to solar & renewable energy!

        • Bob_Wallace

          Well, chime in with whatever generalities you can.

          Do you, for example, see CSP with storage as the answer to the post PV hours peak? Will CSP be able to beat stored PV for the late afternoon/early evening hours? Might Wyoming wind be a big competitor for that market?

          • Arik Ring

            I see a future with a dramatically different energy mix compared to today: lots of distributed generation mainly PV, and a grid with cocktail of solar technologies, CSP/PV/CPV, wind, geothermal, biomass.
            The grid operators would be using storage & hybridization with smart grid managing the demand side not just electricity supply.

            As solar will be dominant, low cost electricity would be during day time, stored solar energy proving for part of the costlier evening time and night time demand.

            Most fossil power plants will be closed as there negative impact on society will overweigh the contribution to the grid, most nuclear plants to be closed as well.
            Transportation would be shifting to electric power.

            New building will be inherently built to produce electricity and to minimize consumption.

  • JamesWimberley

    Ivanpah is pushing the envekope on CSP technology. Its advertised 500 deg C steam temperature is twice that of more conservative plants in Spain.

  • I figured it out, this is actually why Tim Draper wants to split up California 😉

  • Dave R

    Correction: Utility scale solar peaked at 3.278 GW Feb 5th, not 2.278 GW.

    Big difference!

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