Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×
Power United States

Solar Adds More New Capacity To the US Grid In 2024 Than Any Energy Source In 20 Years 43

AmiMoJo shares a report from Electrek: The U.S. installed 50 gigawatts (GW) of new solar capacity in 2024, the largest single year of new capacity added to the grid by any energy technology in over two decades. That's enough to power 8.5 million households. According to the U.S. Solar Market Insight 2024 Year in Review report (PDF) released today by the Solar Energy Industries Association (SEIA) and Wood Mackenzie, solar and storage account for 84% of all new electric generating capacity added to the grid last year.

In addition to historic deployment, surging U.S. solar manufacturing emerged as a landmark economic story in 2024. Domestic solar module production tripled last year, and at full capacity, U.S. factories can now produce enough to meet nearly all demand for solar panels in the U.S. Solar cell manufacturing also resumed in 2024, strengthening the U.S. energy supply chain. [...] Total US solar capacity is expected to reach 739 GW by 2035, but the report forecasts include scenarios showing how policy changes could impact the solar market. [...] The low case forecast shows a 130 GW decline in solar deployment over the next decade compared to the base case, representing nearly $250 billion of lost investment.

Solar Adds More New Capacity To the US Grid In 2024 Than Any Energy Source In 20 Years

Comments Filter:
  • by DeathToBill ( 601486 ) on Wednesday March 12, 2025 @06:28AM (#65227329) Journal

    The numbers here are somewhat misleading because solar has such a low capacity factor. 50GW capacity probably equates to something like 10GW of average power output (ie about 10GWYr of output across a year - somewhere around five hours of peak output per day) though calculating the exact figure would require detailed knowledge of where it was all installed.

    • Seventeen-and-a-half freakin' cents a kilowatt hour. And I don't even live in California.

      • No your electric bill is high because you privatized your power grid and so you've got a private company sucking money out of your wallet for a universally necessary public service.

        It's almost as if the free markets which depends entirely on competition doesn't function well with natural monopolies... I'm sure another round of privatization will fix this though. Thatcher approves.
      • Stop crying. Here in sunny San Diego we pay $0.40692/kWh for baseline and $0.51236/kWh for usage over 130% of baseline--which is something like 400kWh in the summer? (It's variable based on location)

        I'm on a time-of-use tariff because I have solar, so my rates range from around 42 cents in the middle of the night to 57 cents on peak.
      • Be glad you *aren't* in California, where the average electricity rate is 30 cents / kWH. https://www.energysage.com/loc... [energysage.com]

    • 5 hours peak output per day sounds a bit optimistic, but I'm in Sweden so maybe we have kinda crappy conditions by default. My output in December wasn't that great. :)
      • by Z00L00K ( 682162 )

        Better to list the 50% and 25% of peak values.

        On a solar system I'm monitoring the 50% level gives 6 hours, 25% gives 7 hours.

        This is on Gotland, Sweden.

        Solar panel arrangements also plays a role here - east and west orientation supplements south orientation pretty well. The different orientations make a less pointy peak while giving more hours of production.

        Add batteries and an electric car and you'll definitely have an advantage from more hours of production. Excess power is fed to the grid. Excess power

      • In Texas, where summers are hot and the sun is scorching, that peak output lasts considerably longer.

    • Show your work.

      • from 2015 data, for large-scale solar:
        Installed capacity: 8,290 MWp
        Annual generation: 18,291 GWh
        Capacity factor: 25.2%

        Old data, but since the number of hours of sunlight haven't changed, probably still accurate (except that some large installations have switched to tracking arrays, which increase capacity factor).
        Source https://euanmearns.com/solar-p... [euanmearns.com]

    • by AmiMoJo ( 196126 )

      Sure, but the point here is that solar is growing rapidly in the US, despite attempts by many different groups to kill it. And what's more, a lot of it is being manufactured in the US.

      Here's a successful, rapidly growing part of the economy. If the government had any sense they would be trying to turbocharge it.

      The manufacturing and installation creates lots of jobs, far more than any other source of energy. Decently paid jobs.

      • Here's a successful, rapidly growing part of the economy. If the government had any sense they would be trying to turbocharge it.

        If it's successful on its own, it doesn't need government help.

        Has DOGE not made this clear? The US Federal Government exists as a means to launder money to elected and appointed officials, not to help businesses.

    • The numbers here are somewhat misleading..

      Id agree. What we are missing is if there were no tariffs whatsoever on solar (thanks Obama, Trump, and Biden) and the world was flooded with solar that cost almost nothing. The cost to subsidize American solar would be nothing as we make nothing, maybe a few tens of millions but the cost savings would be in the billions to tens of billions over the lifetime of the panels. Panels so cheap homeless people sleep under discarded solar panels instead of cardboard. It’s a matter of national security an

    • My 4.2kW rooftop solar installation, which is not optimally oriented and has some obstructions, has produced a bit over 6MWh/year for the past 7+ years. I'm in Southern California, but not out in the desert so insolation isn't as high as it could be, either.

      Some arithmetic (6,000,000 / 4,200) gives a multiplier of 1,428; dividing by 365 as a sanity check results in ~3.9 hours/day of nameplate output.

      Scaling this pessimistic case up to 50GW gives 71.4TWh/year. Given that storage is also coming online a
    • So five AI data centers?

      I like solar but it's very troubling that we added 10GW of solar and that was the most, and 80GW of baseload demand.

      If we added 10GW of solar and 100GW of atomic energy then we'd be on the right track.

      Working families shouldn't be priced out of electricity by chatbots on a grid that humans built.

  • The Soviet chief rocket designer Sergei Korolev wanted to know more about what the Americans were doing. Hence he arranged a screening of a film on the US rocket program for he and his deputies.

    Midway into it, he angrily scolded the woman who was simulataneously translating the English-language narration. Apparently the translator was not only speaking the words in Russian, she was reproducing the excitement of the American narrator on how glorious the American rockets were. Korolev demanded that she

    • Korolev demanded that she translate the rest of the movie narration with much less enthusiasm.

      Of course! If he were to let slip that they were under his control it would spoil the surprise ending

    • Is that this is propaganda and we should ignore it.

      But so it's kind of not a good look to use America's rocket program for that because well, it worked. Like really really well. Our rocket program has produced some of the best tech in human history and it continued to write up until we started to slash funding.

      As for solar power it is currently the most profitable form of energy you can build out right now. On paper nuclear should be able to best it but it never can because it's difficult to build a
    • [citation missing]

      This sounds more like one of the apocryphal Khrushchev stories than an apocryphal Korolev story.
  • Inverters (Score:4, Interesting)

    by tronicum ( 617382 ) * on Wednesday March 12, 2025 @07:40AM (#65227403)
    The summary emphasis on the cell production. To use them inverters are needed. Given most of them come from China and Trump is applying tariffs on them⦠Would be interested if they produce them locally, too.
    • by gweihir ( 88907 )

      Would be interested if they produce them locally, too.

      With parts from China? What would be the gain? Oh, you mean everything made locally. Well, maybe with a massive investment possible in 20 years and then much more expensive than with the current tariffs.

      Now, in actual reality, these are large-scale inverters. They likely come with equipment from Siemens or the like, i.e. from Europe. If you wanted to make these domestically, say >30 years because the skills are not there in the US.

      • They likely come with equipment from Siemens or the like, i.e. from Europe.

        The company may be European but the production is not. Just like how some Teslas are subject to import tariffs. Not because they are American but because they are Chinese.

        And yes Siemens does a lot of manufacturing in China. Companies are sensitive to the cost of their supply chains. Just like car companies in the USA are about to increase the costs of American made cars since they have been importing aluminium from Europe.

      • 30 years?

        That's goofy, I don't even know where to begin. You know companies like Siemens (who announced a plant for inverters in Wisconsin in 2023) are bringing production here, right?

        And ... Europe? Sure, there's Siemens and SMA, etc. ... but Huawei, Sungrow, Ginlong Solis, Growatt, and GoodWe--all Chinese companies--dominate the worldwide market.
    • To use them inverters are needed.

      Many of the chips do not come from China, and the rest of the component cost sourced in China is low compared to the current retail value. So it would cost more, but this is mostly in chassis and large component assembly labor which is not too intensive considering the circuit board manufacturing and population is so highly automated.

  • The question isnt how much solar but how much storage have they added.
    • by gweihir ( 88907 )

      That happens to be untrue. If solar is distributed enough geographically, the question of storage becomes less important. Obviously the usual nay-sayers do not know that. Well, to be fair, they essentially know nothing so why would they know how renewables actually work.

      • That happens to be untrue. If solar is distributed enough geographically, the question of storage becomes less important. .

        Only if we had the transmission capacity to wheel power over literally intercontinental distances, which we don't.

      • by quenda ( 644621 )

        If solar is distributed enough geographically, the question of storage becomes less important.

        The sun is always shining somewhere! Deep winter nights in Quebec just need Australian solar.
        So, how is progress on the 50GW intercontinental power links?

      • If solar is distributed enough geographically, the question of storage becomes less important.

        Really? If you distribute panels so widely that the sun is always shining on them, I guess? Or maybe "distribute" them to orbit? Good grief.

        Then there's the fact that here in California we're already encountering negative rates due to solar overproduction that has nowhere to go. Storage is in its infancy compared to PV generation and the parent post has a very good point.

        It would appear you don't know how it works either.

  • Apparently even the die-hard stuck-in-the-past nuclear fanatics cannot do it. Cost matters and nuclear loses any advantage when maintenance of the nuclear arsenal is assured. This is, incidentally, why France plans a total of 4 (!) new reactors longer-term (except for the idiot asshole populists on the ultra-right side that will just promise anything that might get then votes) and the UK is building Hinkley Point with is abysmally bad economic profile: Nuclear material for the bomb. No other reason. No econ

    • Apparently even the die-hard stuck-in-the-past nuclear fanatics cannot do it. Cost matters and nuclear loses any advantage when maintenance of the nuclear arsenal is assured. This is, incidentally, why France plans a total of 4 (!) new reactors longer-term

      Everyone likes to rag on France, especially greenies for some reason. France with their stuck-in-the-past nuclear fleet have emitted far less pollution and CO2 than almost anyone else when it comes to electricity generation, and here's the key thing: conti

  • Hopefully trump will get rid of this solar before it causes too much cancer and kills all the birds.
  • Despite the governor's crusade against green energy, its lack of regulation has allowed green energy companies to proliferate, making it by far the #1 state in green energy output, and new green energy installations. https://electrek.co/2025/03/10... [electrek.co].

"The Mets were great in 'sixty eight, The Cards were fine in 'sixty nine, But the Cubs will be heavenly in nineteen and seventy." -- Ernie Banks

Working...