As for the hybrid install the only thing I can find is a Magnum Inverter/Charger that does phase shifting, and basically when the batteries are full, it shifts the phase out and the inverters/micro-inverters turn off "Grid Down", When the batteries need charge again it brings the phase back down and the inverters see "Grid On".
Currently this is only known to work with Enphase micro-inverters.
I can't see why they don't develop in the inverters some sort of control protocols, then coupled with an intelligent isolator and Master inverter/charger when the grid goes down the master inverter draws from battery to power the house, issues a control cutout to the intelligent isolator which disconnects the grid from the house forming an island, the master inverter then all the while powering the house issues a controlled switch on to the micro inverters to supply power, or the master inverter could be big enough to simulate the grid which would turn on the micro-inverters. The latter being harder to manufacture but allow for inter vendor interoperability but also increasing costs, the other controlled switch on probably restricted to vendor matching between devices, but also allowing for control over the micro-inverters show there be excess power to shut them down.
Sounds simple and easy enough to do ?,
