Lifting an Olympic Swimming Pool (2.5 Mlitres) up 1 metre against gravity needs about 7kWh.
7kWh of Lithium battery is tiny, like three shoeboxes. And apparently costs about $1500 on eBay though I was expecting about $5k-$7k.
Surely it costs a lot more to buy two Olympic pools worth of land, dig it out, line it, and buy the turbines and pipes and stuff?
Dinorwig in Wales moves a lake 3.5km long and 26m deep, cost hundreds of millions to build, stores 9.1 GWh and Wikipedia says it’s questionable whether it’s financially viable in todays energy market, estimating 40 years to a return on investment for just arbitrage night to day electricity costs.
Lifting an Olympic Swimming Pool (2.5 Mlitres) up 1 metre against gravity needs about 7kWh.
7kWh of Lithium battery is tiny, like three shoeboxes. And apparently costs about $1500 on eBay though I was expecting about $5k-$7k.
Surely it costs a lot more to buy two Olympic pools worth of land, dig it out, line it, and buy the turbines and pipes and stuff?
Dinorwig in Wales moves a lake 3.5km long and 26m deep, cost hundreds of millions to build, stores 9.1 GWh and Wikipedia says it’s questionable whether it’s financially viable in todays energy market, estimating 40 years to a return on investment for just arbitrage night to day electricity costs.
https://en.wikipedia.org/wiki/Dinorwig_Power_Station