Mark Jacobson’s Post

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Professor-Civil & Environ Eng, Director-Atmos/Energy Program at Stanford U; Co-founder-Solutions Project & 100% Movement

This is getting so easy, it's almost boring. California reached 113.2% Wind-Water-Solar supply as a percent of state grid demand today (Tue, Mar 19, 2024). CA has exceeded 100% WWS for 0.25-6 hours per day on 11 out of the past 12 days now. And today is only the first day of spring.

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Robert Ford

Retired and touring the world 🌎

1mo

Wow well done renewables USA. Not so fortunate in the UK see below. Not to worry I'm sure the wind will blow next week 😞 On the evening peak of the 20th March the UK demand was 38GW mild temp 13deg C. The installed wind of 28GW was producing 4.5% or 1.73 GW. COAL was producing 2.53% or 952MW from a capacity of 1.8GW (to be shutdown in September) The remaining UK generation was supplied from Gas, Nuclear and biomass. Fortunately 🤞 our European friends were supplying the remaining 15% via subsea cable interconnectors. There was no reserve generation as a result a major cable or substation fault would have severe consequences. We are planning 600,000 heat pumps to be installed annually and EV to grow very quickly all to be connected on to an aging asset stripped electrical system. There is loads of talk about investing in the grid and generation but are we investing in the correct type of generation?? The type of generation will dictate the new routes for transmission lines and substations. When considering the above is a high dependency on wind the way to go.

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And yet California continues its march to the highest electricity prices in the country. And in July, we can all expect a change in our electricity billing to include connection fees based on income, another "first" in the progressive green movement to make things more fair for the lower income. Spring is always good for renewables when grid load is 1/2 of what if will be in a couple more months. This is a new hybrid PV/battery station that just came on line at Edwards. Easy to see why we are paying more for electricity.

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Hilary Smith

Head of Data Collection and Community Outreach at Miro Health

1mo

Also have to wonder how many people are turning their electricity off at certain times of the day (or as much as possible) because rates have skyrocketed. Would have renewables if we could. Too many trees block the sunlight here. Womp womp.

Mike Robinson

Owner at Mike Robinson LLC

1mo

Living large 15 minutes a day. Well, most days.

Terry Bilke

Senior NERC Compliance Consultant at HSI. Opinions are my own.

1mo

Not so easy for the generators and operators that have to scramble when the sun sets. Oh, there’s batteries that can contribute for a couple hours. Right, we can put in more storage, but that would take four times the storage and four times the panels to charge them. Luckily, we never have cloudy days. We’re watching a race to a second world economy. Time for another inflation reduction act.

Mitsu Kurashina

Kurashina corp. solar, tracker, electrolysis, wind, EV, Hydrogen, Methanol, consulting

1mo

Mark, thank you for sharing, great posting, indeed. Electricity demand at peak is 24 GW in Calif, wow. 30years ago I was dreaming the solar tracker would contribute to the World, and the first large scale solar tracking grid power plant was built in Suncheon south Korea by my consultation in 2006, with Sanyo solar panel and Array tracker which made Array to have a factory, then I had Japanese Government field tests of solar tracker with Mitsubishi Heavy Industries and Sharp at several spots in Japan for several years which brought the big solar projects by Google and KKR in California, which was deployed by Sharp with Recurrent Energy, PowerLight and Array got busy then in California. I am glad for which I could contribute. The success of the World first solar tracking power plant in South Korea was the big first milestone historically speaking. In the end of this comment, let me admire the decision of Sanyo Japan and Sanyo Korea, Dr. Lim. Alma Ryu, Mitsubishi Heavy Industries and Sharp, Recurrent Energy. NEDO, Tokyo Government, Kanagawa Government, Japan Government.

Chase Sun

Retired Principal Engineer

1mo

Mark Jacobson Did the CA grid demand drop to zero as shown in the second graph? If not, you may want to remove the misleading section of the graph. As you pointed out, as CA goes to higher DER penetration levels, this will happen more and more. However, it may be more and more challenging to maintain future grid stability at higher intermittent resource levels, especially if the existing dispatchable gas-fired plants that are being used to maintain grid stability are forced to retire. The grid requires a dynamic balance between generation and load to maintain grid stability. Storage can help but they are expensive and may increase electric rates. I suspect that CAISO also may deploy more and more PV curtailment in the future to avoid overgeneration due to excessive PV contribution.

Michael Fjetland

Author, Int'l Attorney, Terrorism Analyst and CEO at Armor Glass

1mo

Amazing. Texas now leads in solar and wind but the GOP is punishing renewables for their fossil fuel donors, despite our record triple digit heat last fall. Only renewables kept us from having blackouts.

Elie Khawand

President and Engineering Director at Digital Lighting Systems, inc

1mo

The grid has to be as powerful as the peak demand for electric energy at the time of that peak. Hydroelectric is the only alternative energy that is continuously available and that could quickly respond to the sudden peaks in demand at any time. Solar and wind are a good backup but still not reliable for continuous supply of power. Their imposition on Energy companies have drained their resources and stopped them from building up their fossil fuel plants to satisfy the growing demands.

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