that is similar to how I plan on setting up most of my panels in Jamaica so I dont have islanding. not sure yet what to do about the generator backup yet, but have been noticing more and more home inverters coming out with generator ports for charging the battery systems, yet, they also seem to be geared more for grid connection... Which is not where I am headed for now.
It gets confusing sometimes trying to keep up with changes in solar technology since everyone seems to have jumped on the grid connect rather than what you need when the grid goes down. Is it too hard to ask for off grid stuff that can handle a whole house, even if it is in sections, that is around 150 amps? And charge the batteries? But, at least in Jamaica, right now grid connected is not really allowed and the red tape and yearly permit if you do it costs more than you might actually produce. Because you are required to license as a micro generation station.