3 ms·

User "jeffbee" said that California has 250MW of battery facilities right now

• fallingknife 6y ago
  I assume that's 250MWh, and California consumes 260 TWh per year, so that's 30s of power consumption.
  • jeffbee 6y ago
    No, it's 250MW of peak power. I'm not sure what the total energy storage capacity is for California, but the typical project has 4 hours of capacity. For an example please see this PG&E project which is coming online in Summer 2021. These installations have 700MW of power capacity and each has a 4-hour discharge time. https://www.pge.com/tariffs/assets/pdf/adviceletter/ELEC_5826-E.pdf https://www.pge.com/tariffs/assets/pdf/adviceletter/ELEC_582...
    • fallingknife 6y ago
      You're right about the numbers, but still this is tiny at the scale of the grid. 2.8GWh is still only around 5 mins of consumption. You would probably need a few days of storage to run a 100% wind/solar grid, so that's about 1000x more.