Battery Storage with Enphase m215/M215 IQ7-240 microinverters

Hi-

This is my first post. I want to add battery storage to our grid-tied, 8 kW solar array with mixed Enphase M215 and M215 IQ7-240’s micro-inverters and the bare bones Envoy unit. Ideally*, we’d like the storage system to power the house during non-solar hours (5.3 kWh/cycle for our most demanding months).  Our current solar grid export averages 10-26 kWh/day, lowest to the highest months. 

NAZ suggested the LG Home Battery Backup Unit. Doe anyone know if this unit is compatible with my mix of M215 and M215 IQ7-240  micro-inverters?

Are my storage system options pretty limited with my older equipment?  If anyone can point me to some proven, compatible storage options to look into, I would really appreciate it!

Rob Danielson

*I'm hoping the storage system can power our array when the grid is down, keep the batteries solar-charged, allow normal grid tie export, provide controllable transition to night operation on battery storage and prevent stored power from being exported to the grid.