This is a very general question. Is it possible with a quattro to supplement grid power with a generator? I am looking at potentially having a source of fuel that is free which I can run a generator with, but my generator is not sufficient to run my entire house on its own, and my source of fuel may be intermittent. If it is possible I would like to run the generator around 50% capacity to offset some of the grid usage to reduce my power bill, which is enormous in the summer. Like 3000 dollars a month enormous. I do not have batteries at the moment, but I will in the future.