California Generates Enough Solar Power to Meet Half Its Energy Needs
By Jeremy Deaton
California Gov. Jerry Brown (D) took a shot at Sec. of Energy Rick Perry, former Republican governor of Texas. Remarking on Perry's view of Texas as an energy powerhouse, Brown said, "We've got more sun than you've got oil."
Recent data shows California coming through. The state briefly generated enough solar power to meet nearly half of the state's electricity needs, according to data from the largest grid operator in the state, California ISO.
Around midday on March 3, demand reached around 29 Gigawatts (GW), while solar was providing nearly 14 GW of generation—some 9 GW from utility-scale arrays and another 5 GW or so from rooftops and parking lot canopies around the state.
California's renewable energy output, midday on March 3.California ISO
"It's remarkable that over a third of the solar power generated in California comes from smaller rooftop systems, meaning hundreds of thousands of homeowners are reaping the economic value generated from harnessing the sun rather than the state's big utility companies," said Amit Ronen, director of the GW Solar Institute.
To be fair, the numbers from California ISO are a little squishy. First, California ISO may be the biggest grid operator in California, but it is not the only grid operator. Its numbers do not account for power demand or solar generation in Los Angeles or Sacramento, for instance.
Second, there is no real-time data on California's rooftop solar generation. We know that California has about 5 GW of installed rooftop solar capacity, meaning that if every rooftop solar panel in the state pointed directly at the sun on a cloudless day, they would generate more than 5 GW. Under real-life conditions, they generate slightly less.
But while these numbers are a rough approximation, they illustrate the incredible growth of renewable energy. They also highlight the central challenge of integrating solar into the power grid.
California's net power demand, midday on March 3. California ISO
See the dotted blue line in the graph above? That represents estimated demand. The saddleback-shaped dip in the line is the handiwork of rooftop solar panels, which generate power locally, suppressing demand. After the sun sets, around 6 p.m., demand shoots up again.
But solar power isn't just coming from rooftops. It's also being generated by large-scale arrays operated by utilities. Subtract the electricity generated by utility-scale renewable energy and you get the net power demand, represented by the green line. The green line shows how much energy conventional power plants need to generate to keep the lights on in California. That enormous dip and the subsequent spike, form what energy geeks call the duck curve.
The duck curve, as illustrated by changes in changes net power demand in California. CAISO
Every year, California generates more and more power from solar, exacerbating that midday dip in net power demand. This is problematic, because it's expensive to ramp up power generation from coal- and gas-fired power plants at dusk. Fortunately, there are ways to flatten the duck curve: building out transmission lines to carry solar energy over state lines would broaden the demand; installing grid-enabled appliances that shift demand to the middle of the day; or deploying battery storage, like the Tesla Powerwall, that can store excess generation during the day and discharge it in the evening.
"We still need to make significant investments in energy storage technologies that will allow us to bank solar energy when it's being made so that it can be used whenever we need it, even at night," Ronen said.
The state is aiming to generate 50 percent of its power from renewables by 2030. As part of that effort, legislators are looking for ways to better integrate solar energy into the power grid—to drive down costs, improve performance and flatten ducks, wherever they may quack. So, in September, California passed four bills to expand the use of energy storage.
U.S. Supreme Court Justice Louis Brandeis once described the states as laboratories of democracy. They are also laboratories for energy innovation. As the federal government lurches backwards on renewable energy and climate, California and other progressive states are pushing ahead, providing a model for the rest of country.
Should Texas, for example, want to take advantage of its abundant sunshine, California can show the Lone Star state how to do it.
Reposted with permission from our media associate Nexus Media.
By David Reichmuth
Over the last month, I've seen a number of opinion articles attacking electric vehicles (EVs). Sadly, this comes as no surprise: now that the Biden administration is introducing federal policies to accelerate the roll out of electric vehicles, we were bound to see a reaction from those that oppose reducing climate changing emissions and petroleum use.
The majority of EVs sold in 2020 were models with a starting price (Manufacturers Suggested Retail Price) under $40,000 and only a fifth of models had a starting price over $60,000.
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On Friday, China set out an economic blueprint for the next five years, which was expected to substantiate the goal set out last fall by President Xi Jinping for the country to reach net-zero emissions before 2060 and hit peak emissions by 2030.
The Great Trail in Canada is recognized as the world's longest recreational trail for hiking, biking, and cross-country skiing. Created by the Trans Canada Trail (TCT) and various partners, The Great Trail consists of a series of smaller, interconnected routes that stretch from St. John's to Vancouver and even into the Yukon and Northwest Territories. It took nearly 25 years to connect the 27,000 kilometers of greenway in ways that were safe and accessible to hikers. Now, thanks to a new partnership with the Canadian Paralympic Committee and AccessNow, the TCT is increasing accessibility throughout The Great Trail for people with disabilities.
Trans Canada Trail and AccessNow partnership for AccessOutdoors / Trails for All project. Mapping day at Stanley Park Seawall in Vancouver, British Columbia with Richard Peter. Alexa Fernando<p>This partnership also comes at a time when access to outdoor recreation is more important to Canadian citizens than ever. <a href="https://www150.statcan.gc.ca/n1/daily-quotidien/200527/dq200527b-eng.htm" target="_blank" rel="noopener noreferrer">Studies from the spring of 2020</a> indicate that Canadian's <a href="https://www.bnnbloomberg.ca/moneytalk-mental-health-during-covid-19-1.1567633" target="_blank" rel="noopener noreferrer">mental health has worsened</a> since the onset of social distancing protocols due to COVID-19. </p><p>The <a href="https://www.mayoclinic.org/diseases-conditions/coronavirus/in-depth/safe-activities-during-covid19/art-20489385" target="_blank" rel="noopener noreferrer">Mayo Clinic</a> lists hiking, biking, and skiing as safe activities during COVID-19. Their website explains, "When you're outside, fresh air is constantly moving, dispersing these droplets. So you're less likely to breathe in enough of the respiratory droplets containing the virus that causes COVID-19 to become infected."</p><p>TCT leadership took this into consideration when embarking on the accessibility project. McMahon explains that there has never been a more important time to bring accessibility to the great outdoors: "Canadians have told us that during these difficult times, they value access to natural spaces to stay active, take care of their mental health, and socially connect with others while respecting physical distancing and public health directives. This partnership is incredibly important especially now as trails have become a lifeline for Canadians."</p><p>Together, these organizations are paving the way for better physical and mental health among all Canadians. To learn more about the TCT's mission and initiatives, check out their <a href="https://thegreattrail.ca/stories/" target="_blank">trail stories</a> and <a href="https://thegreattrail.ca/wp-content/uploads/2021/01/TCT_2020-Donor-Impact-Report_EN_8.5x14-web.pdf" target="_blank">2020 Impact Report</a>.</p>
By Kiyoshi Kurokawa and Najmedin Meshkati
Ten years ago, on March 11, 2011, the biggest recorded earthquake in Japanese history hit the country's northeast coast. It was followed by a tsunami that traveled up to 6 miles inland, reaching heights of over 140 feet in some areas and sweeping entire towns away in seconds.
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Nuclear power generates about 10% of the world's electricity (TWh = terawatt-hours). About 50 new plants are under construction, but many operating plants are aging. World Nuclear Association / CC BY-ND
<div id="07c42" class="rm-shortcode" data-rm-shortcode-id="ac2be7bdc1a748c089d24d27f01992a2"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1366694917045690369" data-partner="rebelmouse"><div style="margin:1em 0">🇸🇪 Nuclear Safety statement in IAEA BoG: Important safety upgrades introduced at 6 remaining nuclear power stations… https://t.co/FrgHv4N4UL</div> — SwedenUN Vienna 🇸🇪 (@SwedenUN Vienna 🇸🇪)<a href="https://twitter.com/SwedenUN_Vienna/statuses/1366694917045690369">1614680434.0</a></blockquote></div>
Author Najmedin Meshkati holding an earthquake railing in a Fukushima Daiichi control room during a 2012 site visit. Najmedin Meshkati / CC BY-ND
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