Chunu

I cannot think of using either at times of LS that you need the battery. You run the risk that battery power will be used if a cloud comes over with both of them. This is the reason I suggested to use UTIL to now try and save on grid power during LS like we are having now.
SOL as priority can drive the loads and UTIL will provide power after sunset.

Thanks Scorp007 & jumper for detailed explain.

Glad you found the reason for the alarm. When you indicated you don't have an alarm for battery getting low I found it strange and in the back of my mind I wondered if your inverter doesn't have different warning codes. Again the danger of using current model setting/code numbers for other/clone models.

That is a great point which again shows that each system is different and one must make adjustments based on own system. Not one shoe fits all.