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Why one of our best tools to fight climate change suffers on a hotter planet.
If the world is going to slash greenhouse emissions from transportation, then we need a vast number of drivers to switch from fossil fuel engines to electric cars powered by renewable energy. Yet the EVs we need to mitigate further climate damage might, in one way, be ill-suited to the warmer and more extreme climate we’ve already created.
You may have heard that frigid temps are no friend of the electric vehicle. That is true, since extreme cold is a two-pronged problem. First, physical processes in the battery happen more slowly if it’s chilly out. When the mercury drops, my Tesla Model 3 displays a little snowflake icon to warn me the battery unit is too cold to actually use all the range that should be in there. The second problem is maintaining a comfortable cabin. The battery expends a lot of energy generating enough heat to keep the interior warm for its occupants when the temperatures fall to freezing or below.
When it comes to hot days, that second problem is the big one. The agency Recurrent completed a study this month that demonstrated just how much range is lost on sweltering days like those of this month’s nationwide heat wave.
As long as the afternoon high temperature doesn’t get too high, an EV’s range loss is manageable. With an outside temp of 80 degrees Fahrenheit, they found the car loses only 2.8% of its range to keep the cabin at 70 degrees. Even at 90 degrees, the loss reaches just 5%. That amounts to just 10 miles lost from a 200-mile EV. You might not even notice it — it’s probably not that far off from what’s lost by driving 80 miles per hour down the freeway instead of the posted speed limit of 65.
When it’s dangerously hot out, though, the story changes quickly. At 95 degrees outside, the average EV loses 15% of its potential range. At 100 degrees outside, the car suffers a staggering 31% range loss to maintain 70 degrees inside the car. The bigger the difference between the outside temperature and the desired inside temperature, the more of your juice is lost to climate control rather than moving the vehicle. This is why range loss is typically worse in winter — a 10-degree day in Duluth means you’re 60 degrees away from the desired 70 Fahrenheit, while a 110-degree day in Phoenix is “only” 40 degrees from the target.
I’ve seen this phenomenon first-hand during scorching trips across the desert from Los Angeles to Las Vegas or up the interstate toward the San Francisco Bay Area, where the drive passed through areas that exceeded 110 degrees. The car offers an estimate for how much will be left on the battery upon arrival at the next charging stop — then that estimate slowly dips lower and lower as more energy is expended just on air conditioning. After a few anxious drives, I learned to hoard a bit more charge than the car thinks it needs to make it comfortably to the next station.
There is also the possibility that lots of high-temperature driving will cause long-term damage to the battery’s electrolyte or other components. There isn’t too much to do about this one other than limiting how often you drive on extreme days, if you can, and hope that future battery materials that are more resistant to heat become a reality sooner rather than later.
However, there are ways to mitigate the EV heat problem during your drive time. It takes more energy to air-condition the cabin down to the proper temperature than it does to maintain the temperature. So, if you’re plugged in to charge at home or at a public charger, have your vehicle reach the desired temp before you unplug and leave.
Also, the figures in Recurrent’s study are based on setting the climate control to 70 degrees. If you and your passengers can cope with a higher cabin temperature, say 75 degrees, then you’re shortening the difference by 5 degrees and giving your battery a break. (Plenty of EV adopters have gone through a moment of panic where they thought they might need to turn off the climate control entirely to ensure they reached their next plug-in.)
Should the planet’s new normal of extreme heat deter you from going electric? First, remember the manta that experts repeat as a rebuttal to range anxiety: Most people do the vast majority of their driving close to home. Running the A/C on max to survive an August trip to Trader Joe’s isn’t going to make your EV battery hit zero unless you were too low to begin with.
If you’re really worried about the extreme temperatures of your home region, then splurge for range. I’ve recommended this before regardless of where you live and drive. But if you live in the middle of the desert and can afford the longer-range version of a particular EV, then buy it and save yourself the mental strain of wondering whether the summer sun will limit how far you can really drive your car.
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On the looming climate summit, clean energy stocks, and Hurricane Rafael
Current conditions: A winter storm could bring up to 4 feet of snow to parts of Colorado and New Mexico • At least 89 people are still missing from extreme flooding in Spain • The Mountain Fire in Southern California has consumed 14,000 acres and is zero percent contained.
The world is still reeling from the results of this week’s U.S. presidential election, and everyone is trying to get some idea of what a second Trump term means for policy – both at home and abroad. Perhaps most immediately, Trump’s election is “set to cast a pall over the UN COP29 summit next week,” said the Financial Times. Already many world leaders and business executives have said they will not attend the climate talks in Azerbaijan, where countries will aim to set a new goal for climate finance. “The U.S., as the world’s richest country and key shareholder in international financial institutions, is viewed as crucial to that goal,” the FT added.
Trump has called climate change a hoax, vowed to once again remove the U.S. from the Paris Agreement, and promised to stop U.S. climate finance contributions. He has also promised to “drill, baby, drill.” Yesterday President Biden put new environmental limitations on an oil-and-gas lease sale in Alaska’s Arctic National Wildlife Refuge. The lease sale was originally required by law in 2017 by Trump himself, and Biden is trying to “narrow” the lease sale without breaking that law, according to The Washington Post. “The election results have made the threat to America's Arctic clear,” Kristen Miller, executive director of Alaska Wilderness League, toldReuters. “The fight to save the Arctic Refuge is back, and we are ready for the next four years.”
Another early effect of the decisive election result is that clean energy stocks are down. The iShares Global Clean Energy exchange traded fund, whose biggest holdings are the solar panel company First Solar and the Spanish utility and renewables developer Iberdola, is down about 6%. The iShares U.S. Energy ETF, meanwhile, whose largest holdings are Exxon and Chevron, is up over 3%. Some specific publicly traded clean energy stocks have sunk, especially residential solar companies like Sunrun, which is down about 30% compared to Tuesday. “That renewables companies are falling more than fossil energy companies are rising, however, indicates that the market is not expecting a Trump White House to do much to improve oil and gas profitability or production, which has actually increased in the Biden years thanks to the spikes in energy prices following the Russian invasion of Ukraine and continued exploitation of America’s oil and gas resources through hydraulic fracturing,” wrote Heatmap’s Matthew Zeitlin.
Hurricane Rafael swept through Cuba yesterday as a Category 3 storm, knocking out the power grid and leaving 10 million people without electricity. Widespread flooding is reported. The island was still recovering from last month’s Hurricane Oscar, which left at least six people dead. The electrical grid – run by oil-fired power plants – has collapsed several times over the last few weeks. Meanwhile, the U.S. Bureau of Safety and Environmental Enforcement said yesterday that about 17% of crude oil production and 7% of natural gas output in the Gulf of Mexico was shut down because of Rafael.
It is “virtually certain” that 2024 will be the warmest year on record, according to the European Copernicus Climate Change Service. In October, the global average surface air temperature was about 60 degrees Fahrenheit, or nearly 3 degrees Fahrenheit warmer than pre-industrial averages for that month. This year is also on track to be the first entire calendar year in which temperatures are more than 1.5 degrees Celsius above pre-industrial levels. “This marks a new milestone in global temperature records and should serve as a catalyst to raise ambition for the upcoming climate change conference,” said Copernicus deputy director Dr. Samantha Burgess.
C3S
The world is falling short of its goal to double the rate of energy efficiency improvements by 2030, the International Energy Agency said in its new Energy Efficiency 2024 report. Global primary energy intensity – which the IEA explained is a measure of efficiency – will improve by 1% this year, the same as last year. It needs to be increasing by 4% by the end of the decade to meet a goal set at last year’s COP. “Boosting energy efficiency is about getting more from everyday technologies and industrial processes for the same amount of energy input, and means more jobs, healthier cities and a range of other benefits,” the IEA said. “Improving the efficiency of buildings and vehicles, as well as in other areas, is central to clean energy transitions, since it simultaneously improves energy security, lowers energy bills for consumers and reduces greenhouse gas emissions.” The group called for more government action as well as investment in energy efficient technologies.
Deforestation in Brazil’s Amazon fell by 30.6% in the 12 months leading up to July, compared to a year earlier. It is now at the lowest levels since 2015.
State-level policies and “unstoppable” momentum for clean energy.
As the realities of Trump’s return to office and the likelihood of a Republican trifecta in Washington began to set in on Wednesday morning, climate and clean energy advocates mostly did not sugarcoat the result or look for a silver lining. But in press releases and interviews, reactions to the news coalesced around two key ways to think about what happens next.
Like last time Trump was elected, the onus will now fall on state and local leaders to make progress on climate change in spite of — and likely in direct conflict with — shifting federal priorities. Working to their advantage, though, much more so than last time, is global political and economic momentum behind the growth of clean energy.
“No matter what Trump may say, the shift to clean energy is unstoppable,” former White House National Climate Advisor Gina McCarthy said in a statement.
“This is a dark day, but despite this election result, momentum is on our side,” Sierra Club Executive Director Ben Jealous wrote. “The transition away from dirty fossil fuels to affordable clean energy is already underway.”
“States are the critical last line of defense on climate,” said Caroline Spears, the executive director of Climate Cabinet, a group that campaigns for local climate leaders, during a press call on Wednesday. “I used to work in the solar industry under the Trump administration. We still built solar and it was on the back of great state policy.”
Reached by phone on Wednesday, the climate policy strategist Sam Ricketts offered a blunt assessment of where things stand. “First things first, this outcome sucks,” he said. He worried aloud about what another four years of Trump would mean for his kids and the planet they inherit. But Ricketts has also been here before. During Trump’s first term, he worked for the “climate governor,” Washington’s Jay Inslee, and helped further state and local climate policy around the country for the Democratic Governors Association. “For me, it is a familiar song,” he said.
Ricketts believes the transition to clean energy has become inevitable. But he offered other reasons states may be in a better position to make progress over the next four years than they were last time. There are now 23 states with Democratic governors and at least 15 with Democratic trifectas — compare that to 2017, when there were just 16 Democratic governors and seven trifectas. Additionally, Democrats won key seats in the state houses of Wisconsin and North Carolina that will break up previous Republican supermajorities and give the Democratic governors in those states more opportunity to make progress.
Spears also highlighted these victories during the Climate Cabinet press call, adding that they help illustrate that the election was not a referendum on climate policy. “We have examples of candidates who ran forward on climate, they ran forward on clean energy, and they still won last night in some tough toss-up districts,” she said.
Ricketts also pointed to signs that climate policy itself is popular. In Washington, a ballot measure that would have repealed the state’s emissions cap-and-invest policy failed. “The vote returns aren’t all in, but that initiative has been obliterated at the ballot box by voters in Washington State who want to continue that state’s climate progress,” he said.
But the enduring popularity of climate policy in Democratic states is not a given. Though the measure to overturn Washington’s cap-and-invest law was defeated, another measure that would revoke the state’s nation-leading policies to regulate the use of natural gas in buildings hangs in the balance. If it passes, it will not only undo existing policies but also hamstring state and local policymakers from discouraging natural gas in the future. In Berkeley, California, the birthplace of the movement to ban gas in buildings, a last-ditch effort to preserve that policy through a tax on natural gas was rejected by voters.
Meanwhile, two counties in Oregon overwhelmingly voted in favor of a nonbinding ballot measure opposing offshore wind development. And while 2024 brought many examples of climate policy progress at the state level, there were also some signs of states pulling back due to concerns about cost, exemplified by New York Governor Kathy Hochul’s major reversal on congestion pricing in New York City.
The oft-repeated hypothesis that Republican governors and legislators might defend President Biden’s climate policies because of the investments flowing to red states is also about to be put to the test. “I think that's going to be a huge issue and question,” Barry Rabe, a public policy professor at the University of Michigan, told me. “You know, not only can Democrats close ranks to oppose any changes, but is there any kind of cross-party Republican base of support?”
Josh Freed, the senior vice president for the climate and clean energy program at Third Way, warned that the climate community has a lot of work to do to build more public support for clean energy. He pointed to the rise of right-wing populism around the world, driven in part by the perception that the transition away from fossil fuels is hurting real people at the expense of corporate and political interests.
“We’ve seen, in many places, a backlash against adopting electric vehicles,” he told me. “We’ve seen, at the local county level, opposition to siting of renewables. People perceive a push for eliminating natural gas from cooking or from home heating as an infringement on their choice and as something that’s going to raise costs, and we have to take that seriously.”
One place Freed sees potential for continued progress is in corporate action. A lot of the momentum on clean energy is coming from the private sector, he said, naming companies such as Microsoft, Amazon, and Google that have invested considerable funds in decarbonization. He doesn’t see that changing.
A counterpoint, raised by Rabe, is those companies’ contribution to increasing demand for electricity — which has simultaneously raised interest in financing clean energy projects and expanding natural gas plants.
As I was wrapping up my call with Ricketts, he acknowledged that state and local action was no substitute for federal leadership in tackling climate change. But he also emphasized that these are the levers we have right now. Before signing off, he paraphrased something the writer Rebecca Solnit posted on social media in the wee hours of the morning after the electoral college was called. It’s a motto that I imagine will become something of a rallying cry for the climate movement over the next four years. “We can’t save everything, but we can save some things, and those things are worth saving,” Ricketts said.
Rob and Jesse talk about what comes next in the shift to clean energy.
Last night, Donald Trump secured a second term in the White House. He campaigned on an aggressively pro-fossil -fuel agenda, promising to repeal the Inflation Reduction Act, Biden’s landmark 2022 climate law, and roll back Environmental Protection Agency rules governing power plant and car and truck pollution.
On this week’s episode of Shift Key, Jesse and Rob pick through the results of the election and try to figure out where climate advocates go from here. What will Trump 2.0 mean for the federal government’s climate policy? Did climate policies notch any wins at the state level on Tuesday night? And where should decarbonization advocates focus their energy in the months and years to come? Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Jesse Jenkins: You know the real question, I guess — and I just, I don’t have a ton of optimism here — is if there can be some kind of bipartisan support for the idea that changing the way we permit transmission lines is good for economic growth. It’s good for resilience. It’s good for meeting demand from data centers and factories and other things that we need going forward. Whether that case can be made in a different, entirely different political context is to be seen, but it certainly will not move forward in the same context as the [Energy Permitting Reform Act of 2024] negotiations.
Robinson Meyer: And I think there’s a broad question here about what the Trump administration looks like in terms of its energy agenda. We know the environmental agenda will be highly deregulatory and interested in recarbonizing the economy, so to speak, or at least slowing down decarbonization — very oil- and gas-friendly.
I think on the energy agenda, we can expect oil and gas friendliness as well, obviously. But I do think, in terms of who will be appointed to lead or nominated to lead the Department of Energy, I think there’s a range of whether you would see a nominee who is aggressively focused on only doing things to support oil and gas, or a nominee who takes a more Catholic approach and is interested in all forms of energy development.
And I don’t, I don’t mean to be … I don’t think that’s obvious. I just think that’s like a … you kind of can see threads of that across the Republican Party. You can see some politicians who are interested only, really, in helping fossil fuels. You can see some politicians who are very excited, say, about geothermal, who are excited about shoring up the grid, right? Who are excited about carbon capture.
And I think the question of who winds up taking control of the energy portfolio in a future Trump administration means … One thing that was true of the first Trump administration that I don’t expect to go away this time is that the Trump policymaking process is extremely chaotic, right? He’s surrounded by different actors. There’s a lot of informal delegation. Things happen, and he’s kind of involved in it, but sometimes he’s not involved in it. He likes having this team of rivals who are constantly jockeying for position. In some ways it’s a very imperial-type system, and I think that will continue.
One topic I’ve been paying a lot of attention to, for instance, is nuclear. The first Trump administration said a lot of nice things about nuclear, and they passed some affirmatively supportive policy for the advanced nuclear industry, and they did some nice things for small modular reactors. I think if you look at this administration, it’s actually a little bit more of a mixed bag for nuclear.
RFK, who we know is going to be an important figure in the administration, at least at the beginning, is one of the biggest anti nuclear advocates there is. And his big, crowning achievement, one of his big crowning achievements was helping to shut down Indian Point, the large nuclear reactor in New York state. JD Vance, Vice President-elect JD Vance, has said that shutting down nuclear reactors is one of the dumbest things that we can do and seems to be quite pro, we should be producing more nuclear.
Jenkins: On the other hand, Tucker Carlson was on, uh …
Meyer: … suggested it was demonic, yeah.
Jenkins: Exactly, and no one understands how nuclear technology works or where it came from.
Meyer: And Donald Trump has kind of said both things. It’s just super uncertain and … it’s super uncertain.
This episode of Shift Key is sponsored by …
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As a global leader in PV and ESS solutions, Sungrow invests heavily in research and development, constantly pushing the boundaries of solar and battery inverter technology. Discover why Sungrow is the essential component of the clean energy transition by visiting sungrowpower.com.
Intersolar & Energy Storage North America is the premier U.S.-based conference and trade show focused on solar, energy storage, and EV charging infrastructure. To learn more, visit intersolar.us.
Music for Shift Key is by Adam Kromelow.