Deye Hybrid Inverter Review - Off-grid [Sunsynk, Sol-Ark]

So, I will check the connection with Safeguard again. It can also be because of the type of safeguard. All the rest are fine.

I assume with UPS you mean the ac power provided on the inverters “backup LOAD” port.

If power is not provided from grid (for example turned off for maintenance), the inverter should (must) not generate and potentially inject power to the grid.

Afaik the backup power provided on the load port is there instantly and without a noticeable delay for consumers