The magic of silicon carbide. Remember, having a 3 phase input means you have 1/3 the current per phase Though, I will concede on the price estimate. At 250kw,

The magic of silicon carbide. Remember, having a 3 phase input means you have 1/3 the current per phase Though, I will concede on the price estimate. At 250kw, you get 180A per phase, which is still outside of range for commodity parts. And at 350kw, switches which can handle 250A cost few hundred dollars each. Alternatively, you can use a 3 phase transformer to 1400V, and rectify to 800DC.