3 phase power out of three AC500 to connect to a wallbox

Hi everyone, how can I connect 3 Bluetti to get a 3 phases output to be able to connect to a wallbox. I have seen a lot of Youtube videos transfroming the IT to a TT net output. Is there an official solution available by Bluetti? The output is 220V/EU version. Thanks.

@Jo1966 Very sorry, AC500 supports only one host in high voltage area with single phase 220V output.