I can't find any price or performance numbers on their site so I'm sceptical.
I did find some alibaba listings for pressure tanks. The cheapest believable ones were about $100 for a 50L 300bar tank. This works out to about $3k for a MWh of storage. You'd have to fill and empty it a couple of times a year for 20 years to break even vs nuclear just on the storage cost.
It might beat retail in some areas though, and you'd need 50 or so of them to over winter in cold areas.
Sounds like medium term storage (weeks) is solved if $100/tank (or even $1000/tank) is doable though.
I did find some alibaba listings for pressure tanks. The cheapest believable ones were about $100 for a 50L 300bar tank. This works out to about $3k for a MWh of storage. You'd have to fill and empty it a couple of times a year for 20 years to break even vs nuclear just on the storage cost.
It might beat retail in some areas though, and you'd need 50 or so of them to over winter in cold areas.
Sounds like medium term storage (weeks) is solved if $100/tank (or even $1000/tank) is doable though.