So I was thinking an alternative to a VFD might be:
* build a powerwall and then turn the DC power you get out of it into 3 phase 415V.
* turn 240v into 3 phase 415v, perhaps using a battery as 'reserve' storage that your 240v AC charges.
Can anyone tell me if this is a doable thing, and give rough prices for the components you'd need?
The advantage would be if you have some storage for peak power demands you could then get quite big machines (8kw Mazak etc.) and run them as a hobbyist. You are probably not going to use it for very long so while you'd need the 415v the total kwhr you have in reserve would not need to be that high.


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