GerhardB

My setup is as follows: 2x 3x400W solar panels an 5KVA 4kW Axpert inverter clone running with 1 Pylontech US3000 battery. Custom home software scanning inverter and battery at 3 sec intervals. With settings of 30A charging and bulk charge Voltage above 53.2V and float 53.2V I get the same PV drop problem if the battery is fully charged and the load is suddenly changed like with an iron switching on or off. I have notice under these conditions the inverter float charging have a fast overshoot with 1V to above the 54V triggering the battery protection. This seems like confusing the SCC and seems like it gets into a bad state. After dropping the bulk charge Voltage to 52.8V and float to 52.8V the 1V over swing is below the 54V of the battery and there are no problems. These condition is monitored continues in my software and email me if this happens. With theses settings for my setup I don't get this problem any more.