GGinelli

Just some feedback on this matter... After having the batteries in for a month and more imbalance between the three, I decided to book them back in at the after sales service department. They had the batteries for almost a month and had to change the signal board (BMS) on one or two of the batteries. From what I understand, the BMS is supposed to work out the imbalance by itself. I received the batteries a few days ago and are monitoring them now.

Did you manage to have this issue sorted? I have 3 x BX51100s which after one month after installation started drifting out of sync. Booked the batteries in and after one month received them back. Two days after installation they started drifting out of sync again. I didn't check the individual SOCs but from the indicator lights the difference is evident.

@Lindy001, I'm experiencing the same issue. Was your issue resolved?

Hi all, I'm sitting with the issue of unequal charge on my 3 x Dyness BX51100's. This morning the SoC level reported by my inverter was 30%, 1 LED on the master(+/- 20%), 3 LEDs (+/-60%) on slave 1 and 2 LEDs (+/-40%) on slave 2. How would I go about in equalising the charge/discharge on all 3? Should I remove comms, charge each one on it's own to 100% and then reapply comms? I only started experiencing this issue after I changed the comms cables to the correct ones to correct max charge & discharge currents on the BMS. Prior to this, the inverter only allowed 50A max charge/discharge currents and not 50A x N, where N is number of batteries. Deye 8kW inverter 3 x Dyness BX51100, parallelled on a busbar 14 x 550W JA Solar panels

Ultimately it all boils down to how Tshwane detailed the specification to the manufacturer. In the City of Cape Town, all supplied prepayment meters are specified to be configured 'bi-directional, always positive' which means that whichever way the energy flows, it will be seen as a positive load by the meter and will decrement credit.

Change to 'Zero export to load'. That made the difference for me.

I changed from Zero export to CT to Zero export to Load and this stopped me from pushing back anything onto the grid. TOU enabled, grid charge unticked. Only sometimes an impulse of about 20 watts to or from grid experienced. Some contradictions I found in the documentation...Inverter manual indicated that CT arrow should point to the inverter but on a different Deye manual I found online, it indicated that CT arrow should point to grid. I followed the supplied manual but found that the Zero export to CT allows operation from and to the grid hence the change to zero export to load.