Power backup options and questions.

My current situation is 37x 360W panels on the roof with Enphase IQ8 micro inverters. The PV array is tied in my panel on the supply side (into the utility service lines inside the main panel). Main panel is 200A rated.

We have had a couple of power outages that have lasted a few hours, mainly due to thunderstorms and heavy rain (NorthEast US).

I am looking into having a battery/generator backup system. There is no natural gas. Heating/cooling is provided by a geothermal heat pump (WaterFurnace 5 series).

Ultimately, I would like to be able to untie from the grid and to use the power from the solar panels (as well as battery backup and generator) should there be a prolonged outage during the day. Is this something that is possible? I am open to suggestions.