Storage of electric power

The biggest problem of photovoltaic is to bring offer and demand together. Study about possible solutions.

There are 4 order of magnitude at time ranges where balancing has to be achieved.

Time range	Seconds to hours	Day Night	Days to weeks	Summer Winter
Reason	Weather	Earth rotation	Weather	Tilt of planet Earth
Offset in grid	possible	very limited	very limited
Vehicle to Grid and Storage power plants	possilbe	possible
Adjust demand	Dynamic prices and load management
GuD power plants		rare	sometimes	very often

Primary electric power and useable electric power

So far, there was primary energy and useable energy like elektric power. For example 1 kg coal burned, 10 kWh primary energy and the reuslt is 3 kWh electric power as useable energy.

Analog to this, there will be the term primary electric power and useable electric power. For example 2,5 kWh for hydrogen and liquification to make in a Gud hydrogen power plant 1 kWh useable electric power in winter.