DO you have commercially available examples of this setup? While I agree there's no technical reason this wouldn't work when doing research for our generator all the hole house generators use a transfer switch so it's either running the entire house completely disconnected from the grid or turned off and running the house from the grid. Solar didn't make sense for us given the costs and our time horizon, but it's always been something I've been interested in. A solar system with a natural gas generator backup to charge the batteries would be nice, especially for shorter outages so we wouldn't need to hear the generator running.