4 ms·

Hydrogen is really hard to store, though. EDIT: should have qualified my statement with "in man-made objects"

• pfdietz 6y ago
  No, actually it's pretty easy, in underground caverns (cheapest is solution mined cavities in salt; cost per kWh of capacity about 1/200th the per-energy cost of batteries.)
  • eclat 6y ago
    Interesting