3 ms·

A 40 kWh battery stores about as much energy as the bag of coal in your garage for the next barbecue.

• bryanlarsen 2y ago
  If you could efficiently extract the energy, which you can't. A typical coal plant is 33% efficient. You can get 100% efficiency converting the coal to heat, but a heat pump can convert that battery energy to heat at 300-500% efficiency.
  • adrianN 2y ago
    For the purpose of "burn your house down", the energy is usually extracted fairly efficiently from both coal and a battery.
    • pfdietz 2y ago
      And from the large amount of wood and other combustibles that make up the house and its contents.