Gabriel Dragos

Even if the load is under 1kwh and battery have between ex 40 at 100%, and solar is in full charge, i have err 04 1,2 times/min. Setting 29 is automatically set at 45V. I try to change it. Maybe the cells are out of balance?

Even if the load is under 1kwh and battery have between ex 40 at 100%, and solar is in full charge, i have err 04 1,2 times/min.

I return with a last year question: I have a battery Pylontech us3000c and an inverter Mpp Solar 5048 MKX series - set to PYL. Settings are SLB&UCB charger source priority. Output are at SBU. Why time to time I have err 04 low battery or battery under shutdown altough the battery is above 45% to 100% charged? Thank's.

I have a battery Pylontech us3000c and an inverter Mpp Solar 5048 MKX series - set to PYL. Settings are SLB&UCB charger source priority. Output are at SBU. Why time to time I have err 04 low battery or battery under shutdown altough the battery is above 45% to 100% charged? Thank's.

Inverter file attached

I had already made all the settings properly DIP switches and the supplied rs485 cable according to the Pylontech manual. I modified the cable according to the diagram and it worked correctly except for the random errors err 04 as I mentioned. Now, on the recommendation of an automation specialist, I connected the inverter to ground (which was not connected =43-101203-02G_BMS Cable pinout.pdf my mistake). It works perfectly now. Thanks for the guidance.

Thank you very much for the clarifications. So 2+2 pins in the basic version are extra. One question: why some warnings appear for a few seconds like "low battery" or "battery under shutdown" even if the battery is charged? I see that the operating cycle is not disturbed. Do you have an explanation? Thanks.

I agree that a lot of data can be transmitted over two wires, but I logically considered that it's a "shortcut" version, since the base version has 4 pins, which is 6 times more data. But maybe 2 pins are enough ....

However, in my opinion, with just two pins I don't think that all the parameters can be transmitted for a complete battery management >>> inverter. Does anyone have an opinion on this subject?

I found and modified the bms cable according to the attached diagram. Works OK now, even if warnings type 04 low battery randomly appear after it has reached 100% charge (?) 43-101203-02G_BMS Cable pinout.pdf

Hello, I bought a battery Pylontech us3000c.h I have a Mpp solar 5048mkx inverter. On the inverter is one of setups dedicated for PYL batteries. I made it but in operation appear an bad communication alert battery to inverter err 61. The cable and switches are the same from operation manual. What can I do for a good communication battery to inverter? Oder of pins? It's anyone who know this topic? Thanks