I think we can rewire the alternators to achieve higher voltages as needed. I am interested in your #2 option (turbine>battery bank>dc bus of vfd). These would need to be deep cycle batteries? If there was a way to configure the vfd to only use the amount of power that the wind turbines were putting into the bank then maybe the expensive deep cycle batteries would not be needed. Or maybe at least not as high Ah ratings. I mean, only power the pump when power is coming in, and then, only to match (slightly under) what is coming in. How would I regulate this? I guess I had been sizing the battery bank for the pump like you might size one for any other appliance, giving sufficient Ah capacity to ensure power is provided for some time when the wind isn't blowing. But there is a large reservoir for the water. Much, much less might be spent on the batteries if the pump were only to be powered when the turbine is producing, and hopefully, somehow, to match that output. That may have been obvious to everyone else!

Cheers.