Xantrex SW4024 charging issue

I've been upgrading my 20 year old system to incorporate better generator integration. New generator (Champion Home backup 8.5kw) but 240V so in an attempt to maximize output I've added a Meanwell NPB-1700 on the phase that is not being used by the xantrex. The problem that I'm running into is that despite having my charging amps on the xantrex at 27 amps AC, I'm not getting any more that 50 amps at the battery. Anything over 50 is being provided by solar. To make matters more confusing, as soon as I turn on the Meanwell, the generator goes off line from the Xantrex. Has anyone attempted a similar setup and if so any insights.