> 3 phase battery AC-DC converter instead of just putting it with the chargers 3-phase -> DC is easier than single phase. One of the benefits of 3-phase is th

> 3 phase battery AC-DC converter instead of just putting it with the chargers 3-phase -> DC is easier than single phase. One of the benefits of 3-phase is that power delivered is constant, so you don't need very big capacitors. That's part of the reason nobody makes a DC fast charger bigger than about 20kW.