The Victron EV charger works on both 1 and 3 phase configurations.
There is no 2 phase power. But, all our EVs in the US have only two lines input, which can be confusing. I had to do some research to adapt the EVCS to our home, just passing along what I learned for any others that might face similar questions. Here in the US, each home receives a single phase of a 3-phase source at 240v, and we center-tap the transformer to provide a neutral and two legs of 120v, hence “split phase.”
As I understand it, in most of the rest of the world homes receive 3 phase power at 400v, and EVs can either charge line to neutral at 230v up to a certain point of capacity, or at 3 phase for higher charge rates. European EVs have three lines input, using what I think you call “Mennekes” plugs, and can charge either on one or three of those input lines.
In your off-grid application, you can configure the system in whatever configuration you choose, but I’d recomend staying 1-phase. You can stack multiple inverters in single phase, it’s typically more efficient for a small system. Additional inverters give you more capacity at 230v, and reduce the overall loading on any one inverter.
Hope this helps,
Phil