In article ,
The Natural Philosopher wrote:
On 06/10/16 14:55, Nick wrote:
On 06/10/2016 13:46, The Natural Philosopher wrote:

The amount of electrical energy needing to be stored for three winter
months is around 72TWh

72Twh is around 62 megatons of energy. Slightly larger than the biggest
hydrogen bomb ever detonated*.

I make it about 26Kg of energy.


Kg is a unit of mass.
Not energy

but E=mc^2

--
from KT24 in Surrey, England