> As I understand it, the challenge is syncing when changing from standalone to integrated modes.
It's not challenge to switch from grid-connected to off-grid mode. The reason that solar PV systems today shut down during grid outages today is to protect line workers from current feeding back to to the grid from the PV - which is to say the automatic shutoff is there by design.
Home battery storage systems, however, have transfer switches that automatically "island" the PV system from the grid in the event of an outage so that it can continue to produce power.
> The challenge is such that most home PV can’t operate standalone.
It's not challenge to switch from grid-connected to off-grid mode. The reason that solar PV systems today shut down during grid outages today is to protect line workers from current feeding back to to the grid from the PV - which is to say the automatic shutoff is there by design.
Home battery storage systems, however, have transfer switches that automatically "island" the PV system from the grid in the event of an outage so that it can continue to produce power.
> The challenge is such that most home PV can’t operate standalone.
Decentralized != Off-grid