How to convert from 2 phases to 1 phase?

DIY
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1

Hi, Is it possible to use some Victron products to convert from 3x230V AC or 2x230V AC phases to 1 phase 230V AC ?

Something like this: Walle 25A - Walle

2

A clear NO …
You’re interested in increasing the power from 3 or 2 phases for single-phase but higher-capacity charging ?

3

Why would you want to do that when 3 phase systems are more efficient?

4

yes

5

I need a high power single phase and wanted to be distributed on 2 or 3 phases.

6

So: 1 single phase inverter of sufficient capacity to start the load. A Battery of sufficient size to float the inverter, then 3 inverters of >1/3 size of the single inverter operating in charger mode for a 3 phase rectifier. Controllers as required.