thank you for your advice but you are not correct.
One day you claimed (talking about Energy Vault):
"It's nothing but PSH variation using Blocks of high density material instead of water.
Another day you claimed:
"That Vault project is evaluated by many people. When Softbank is promising investment, that means they have used their own team (or third party consultant) to evaluate that model completely.
So if Energy Vault is a variation of PSH and if Softbank has evaluated the Energy Vault, as reliable, worth of investing,
building a desktop model of Energy Vault is the best choice deserving every penny invested.
Engineers always build and test models, build scale machinery for tests since to run calculations one need to access design simulator engine, coming with libraries of real machinery, their performance data, like pumps, cranes, motors
Since there are no development tools on the market, prototypes take the leading place.
Building a prototype of Energy Vault or PSH is no risk, low cost, fast success operation.
I don't work for Softbank so I cannot speak for Softbank
"The company is known for its leadership by founder Masayoshi Son. It now owns operations in broadband; fixed-line telecommunications; e-commerce; internet; technology services; finance; media and marketing; semiconductor design; and other businesses.
Investing $1 in a virtual model is not the same as investing $1M+ in the same virtual model
Are you trying to suggest, Softbank invests huge money in v irtual projects, virtual models , not requesting a working model to be build, tested and evaluated first ?
Line of business of Softbank is not crossing renewable energy projects.
It exactly resembles me investors investing money in virtual projects by Elon Musk, called HyperLoop
But Elon was so kind to build 1km test rail underground to let investors verify all the risks and give up the project, not spending a single penny.
Ok, you are my competitor, so I build prototypes of PSH for Home and Desktop Energy Vault to succeed as soon as posssible
sincce this is a working prototype which matters and can be verified.
Interest in virtual projects is below zero.