There other thing is adoption of such units would be restricted to power grids with very stable power supplies, ie not more regional areas where induction motors are not dying every few years due to grid power failure mode - unless one has decided to bite the bullet and stabilise with solar / battery arrangement.

[1] https://plumbingconnection.com.au/panasonic-releases-co%E2%8...

[2] https://www.panasonic.com/au/corporate/news/articles/panason...