Francois du Rand

I have a solar system consisting of: 1. 18 x 330 W solar panels 2. 3 x 5 kW Axpert inverters 3. ! x 10 kW Dyness Li-on battery As I have started of with 2 x 5 kW inverters, my solar panels provide power through these two panels and the 3 rd inverter gets power from the grid and battery. My problem now is that in the case I draw about 9 kW from the system and the battery voltage came down to 47 V the whole system trips out (goes dead) and have to reboot. At night time with less of a load on the system and the battery comes down to 47 V, the system elegantly switches over to the grid until the battery reaches "back to battery" voltage. My question is why the system elegantly switches to the grid when the load is low and trips out (without switching to the grid) when the system is under load? I have added the third inverter to overcome this challenge, but sadly it made no difference.

Good day. I had a solar system consisting of the following installed at my house 1. 16 x 335 w solar panels 2. 2 x 5 kVA Axpert inverters 3. 1 x 9.6 kWh Dyness Powerbox I would like to pose the following questions to the knowledgeable persons on line 1. What are the optimal max an min Voltage values for charging the Dyness battery? I see the broshure indicates 44.5 to 54 Volts. My system currently runs between 46 and 52 Volt. 2. What is the optimal setting to switch over from Eskom charging to battery? 3. My system charge up to 52V during the day up to 16:30 then rapidly discharge to less than 50V in one hour before the sun even sets. Is this an indication of BMS problem?