During the daytime, your solar panels are dumping power onto the live grid. The same grid your car at work is plugged into. And all your neighbors'. And every other car in the garage or parking lot.
During an outage, unless it's a weather-critical incident or a disaster, the convenience of not needing to go and power a generator (and thus mess with needing to refuel it, and depleting your supplies which will be more useful in a real disaster) would likely be better. If it makes sense to power up a generator, then do that. It would also be charging your car.
Solar panels dump power onto the grid and you get paid by industry electricity price. But at night solar panels don't produce and one has to pay "consumer" electricity price that is 7 times higher!
So a battery system that covers nights and that has a durability of at least 10 years and with a price tag that allow for a amortisation within 8 years would be the way to go.
During an outage, unless it's a weather-critical incident or a disaster, the convenience of not needing to go and power a generator (and thus mess with needing to refuel it, and depleting your supplies which will be more useful in a real disaster) would likely be better. If it makes sense to power up a generator, then do that. It would also be charging your car.