3 ms·

80% round-trip efficiency sounds very good. What am I missing?

• marcyb5st 1y ago
  That to store enough energy with just haline gradient the reservoirs need to be enormous
  • jillesvangurp 1y ago
    And under water construction is expensive. And durable construction in a marine environment is challenging (and makes things more expensive). That doesn't mean it's a bad idea but they are factors that add to the overall cost. 20$/kwh is very attractive of course. But that's also a number that e.g. CATL is chasing with sodium ion batteries. And they are going to be making those by the gwh/year from next month.
    • algo_trader 1y ago
      Whatever happened to the BYD Sodium ESS [1]? By 2024 they were already taking orders and building a something-something giga-actory Fingers crossed for both CATL and BYD [1] https://www.energy-storage.news/byd-launches-sodium-ion-grid-scale-bess-product/ https://www.energy-storage.news/byd-launches-sodium-ion-grid...
• Cthulhu_ 1y ago
  It's in the ocean, which corrodes and destroys All.
  • Filligree 1y ago
    I’ll stick with my freshwater fish tank. Fewer bobbit worms as well.