Are renewables reliable? A new study says California ran on renewables alone for a record number of days last year.

One of the biggest myths about renewable energy is that it isn’t reliable. Sure, the sun sets every night and winds calm down, putting solar panels and turbines to sleep. But when those renewables are humming, they’re providing the grid with electricity and charging banks of batteries, which then supply power at night.

A new study in the journal Renewable Energy that looked at California’s deployment of renewable power highlights just how reliable the future of energy might be. It found that last year, from late winter to early summer, renewables fulfilled 100 percent of the state’s electricity demand for up to 10 hours on 98 of 116 days, a record for California. Not only were there no blackouts during that time, thanks in part to backup battery power, but at their peak the renewables provided up to 162 percent of the grid’s needs — adding extra electricity California could export to neighboring states or use to fill batteries.

  • Steve@slrpnk.netOPM
    10·
    6 days ago

    From the scientific journal directly sited in the article :

    It’s true that solar energy is only produced when the sun is shining on solar panels. Likewise, wind energy is dependent on the ebb and flow of air currents. But the sheer volume of renewable energy being deployed, the ability to store that energy for longer, and to match demand with supply using software, creates a balanced grid.

    According to BloombergNEF, lithium-ion battery cell densities have almost tripled, and costs have declined by almost 90% in the past decade – making it easier to smooth out the peaks and troughs of generation to meet the shifts and cycles of demand. Renewable energy sources themselves have dropped by as much as 82% over the same timeframe. Further improvements to both generation and storage will continue driving down costs, making renewable energy even more attractive to consumers.

    • IrateAnteater@sh.itjust.works
      6·
      6 days ago

      Ok, but none of that mentions how they plan to account for panels buried under a foot of snow for half the year. That’s the source of the concern, not simply smoothing out daily peaks and valleys.

      • Phil_in_here@lemmy.ca
        11·
        6 days ago

        Exactly! Like how hydro-power is a dead end and we shouldn’t invest in it.

        It’s like, “guys, you know there’s who cities that aren’t by a river, right?”

      • SolarMonkey@slrpnk.netEnglish
        9·
        6 days ago

        The snow problem isn’t really that much of a problem if you build for that in mind.

        All the panels need is a small heat strip running through some part of it, maybe even behind the panel, added as aftermarket options, to melt it as it falls, and some sort of sensor to only kick heat on when it’s needed. They have things like that for led traffic lights already, so it would really just be repurposing something that already exists.

        Sure that uses some electricity, reducing the overall efficiency, but 90+% of the year it’s not actively snowing hard enough to need to kick the heat on, so that’s a minimal loss.

        • Buddahriffic@lemmy.world
          2·
          6 days ago

          Could even make it a manual thing or periodic and dependent on the panel having reduced power generation during the day. Heat up the snow while the panel is angled and it will eventually fall off without needing to melt all of it. Then, the rest of the time you can just let it get cold.

          I wish my car’s wheel wells had that to periodically drop the slush/snow that builds up behind the wheels. Just needs to run for a little bit until the chunk falls off.

          • SolarMonkey@slrpnk.netEnglish
            2·
            6 days ago

            I considered mentioning the angled slide-down option, cuz that does work for a lot of applications, but I feel that having it slide off the panel face in a heavy sheet would be bad for it over time, cause scratches and stuff that scatter light and reduce efficiency. Maybe reduce it more than it would be reduced by heating it while it’s snowing heavily, or at least cause it to need replacement or servicing more often.