I am using Sunon-E 3KVA together with the battery. Simple setup.
when the power comes from the city, it is feeding a battery (in parallel), when there is an outage, I can switch inverter to use a battery to feed consumers in my apartment (like refrigerator, router, lights).
Currently, the problem is that I have a dead zone, the inverter is configured to “see” the battery until it goes lower than 25 volt. In the case of the battery goes lower, the inverter shuts down itself and stop providing power to the consumers.
the problem is that when the city resumes giving the power, the inverter still can’t “see” the battery and left in shutdown mode.