There are energy storage mechanisms that last longer than batteries. I don’t know the exact economics or mechanics, but excess energy could be used to pump water to a higher elevation to store the potential energy.
When the energy is needed, at night or in the winter, the water would be allowed to flow back down through turbines to reclaim some of that energy.
Excess energy could also be used for hydrolysis; the hydrogen could be stored for later use.
I’m not 100% sure what you’re asking, but from Wikipedia:
...current best processes for water electrolysis have an effective electrical efficiency of 70-80%,[38][39][40] so that producing 1 kg of hydrogen (which has a specific energy of 143 MJ/kg or about 40 kWh/kg) requires 50–55 kWh of electricity. At an electricity cost of $0.06/kWh, as set out in the Department of Energy hydrogen production targets for 2015[41], the hydrogen cost is $3/kg. https://en.m.wikipedia.org/wiki/Hydrogen_economy
Some quick googling indicates a kilogram of hydrogen seller for around $14, give or take.
There is inefficiency in hydrogen storage, but it should keep longer than a lithium ion battery.
There are energy storage mechanisms that last longer than batteries. I don’t know the exact economics or mechanics, but excess energy could be used to pump water to a higher elevation to store the potential energy.
When the energy is needed, at night or in the winter, the water would be allowed to flow back down through turbines to reclaim some of that energy.
Excess energy could also be used for hydrolysis; the hydrogen could be stored for later use.
How much cost of running machines for hydrolysis is currently payed for the electricity?
I’m not 100% sure what you’re asking, but from Wikipedia:
Some quick googling indicates a kilogram of hydrogen seller for around $14, give or take.
There is inefficiency in hydrogen storage, but it should keep longer than a lithium ion battery.