4 ms·

Wind + Solar + hydro + demand response + some thermal and electric storage has a reliable, predictable output and works after dusk And for new capacities, that

• leecarraher 7y ago
  what about pumped storage hydroelectricity? It currently accounts for 95%-99% of potential energy storage capacity, is far cheaper and more efficient than current commercially available chemical battery storage methods.
  • acidburnNSA 7y ago
    Causes biogenic methane emissions. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5023102/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5023102/
    • pfdietz 7y ago
      That's primary hydropower, where there is an external water source constantly carrying organic material into the reservoir. A closed pumped hydro system could have much less organic input (and possibly could exploit the pumping to keep the water oxygenated, so methane would not be produced.)