I'm new to the forum. Just purchased a 5kw inverter (invest solar/ growatt rebrand from sacolar) and two dyness b4850 batteries. I set program 05 to LI and 036 to CAN protocol 51, everything seems to work fine until battery reaches 52v, 97-98% then I get error message 36 total overvoltage and 03 battery is overcharged. What I have noticed is that the battery does not want to go past 52.5v, the alarm comes again. When I set to LI I also discovered that charge voltage will go to 54v. Any help is greatly appreciated, m stuck without power

I thought it was protocol 52.

2 hours ago, Buyeye said:

I thought it was protocol 52.

On protocol 52 it raises BMS error 20. 51 it works fine until battery is almost full then problem comes. From what I have learnt, if battery voltage gets to 53 even if I switch of panels the inverter raises these codes, I tried user defined mode and the battery got to 100% 54v, then I just tried to see what setting LI will say without connecting panels and still these codes came up. Somewhere there is some disagreement between inverter and battery BMS. Any help is greatly appreciated

29 minutes ago, Dyness said:

This inverter can use 485 communication. If the battery software alarms 03&36, the battery software version needs to be upgraded.

Thank you for your response, if I connect 485 port of the inverter it raises BMS communication error. Right now its connected to CAN but surprisingly communicating with 485 protocol 01. Can you further highlight how I can upgrade this Battery, I'm new to dyness batteries

Battery SNs as requested:

141310012003020045

141410032005120009

3 minutes ago, Dyness said:

You need to send the battery to recton update program.

I do not understand, do I have to send the batteries somewhere or ?

According to the serial numbers I gave you does it mean they are all outdated? M sorry for asking much I'm very new to dyness batteries

3 minutes ago, Dyness said:

According to the serial number of the battery, I found that the battery program needs to be updated. In which city are you in, I will give you the contact information of the nearest after-sales location.

 

I'm in Zimbabwe, I just bought these batteries recently, imagine how it feels. Is there any other way I can get assistance

1 minute ago, Dyness said:

If you find it troublesome to upgrade the software，or you can also use US2 mode. in the program 5 choose US2，then in the program 19  set the charge voltage to 53.5V, in

 the program 20 set the float charge voltage to 52.5V,in the program 21 set the cut off voltage to 47V.In this way, the battery can be used normally without warning.

Ok, thank you, I'm applying those settings right now and will come back to you.

4 minutes ago, Fanie Junior said:

If you find it troublesome to upgrade the software，or you can also use US2 mode. in the program 5 choose US2，then in the program 19  set the charge voltage to 53.5V, in

 the program 20 set the float charge voltage to 52.5V,in the program 21 set the cut off voltage to 47V.In this way, the battery can be used normally without warning.

Program 19 refused to go below 54v but other settings I did as you said, will give you update.

Does it mean anytime I buy other batteries I have to send them for a software upgrade?

28 minutes ago, Dyness said:

If you find it troublesome to upgrade the software，or you can also use US2 mode. in the program 5 choose US2，then in the program 19  set the charge voltage to 53.5V, in

 the program 20 set the float charge voltage to 52.5V,in the program 21 set the cut off voltage to 47V.In this way, the battery can be used normally without warning.

I did but still I get the same error codes. 

59 minutes ago, Dyness said:

Are you set to US2 mode? If the battery program supports the inverter, there is no need to upgrade. The software upgrade is for better use, and our software upgrade is free.

I set to US2 mode, program 19 can not go less than 54v so I left it at 54v, program 20 I set it to 52.5v and 21 to 47v. It charges ok until it goes past 52.5v sometimes 53v then it starts buzzing. It goes way up to 53.5v or slightly above then drain rapidly to 52-52.5. after this it doesn't go above 52.5 but it keeps buzzing. This is exactly what it does when I set to LI in program 05 or to US2. What I have realized is that this error is meaning battery voltage has exceeded the limit. Why does it exceed limit? I do not know but that's where the answer is.

@Dynessplease help me understand this: is it the battery that is responsible for cutting off charge when full or inverter reads voltage and disconnect charge?

7 hours ago, Dyness said:

You can look at the inverter's instruction manual. What is the voltage range set in item 19.like this:

Yes, program 19 only come down to 54, if you input 53.5v it goes back to 54v

7 hours ago, Dyness said:

If it is in the communication state, the battery sends a command to the inverter that the battery voltage is too high, so the inverter will alarm 03&36, and then the inverter will stop charging the battery.

Ok, it's in communication, but the inverter keeps charging even if the codes pop up with alarm

6 hours ago, Dyness said:

You can first set the float charge voltage in item 20 to 52V, and then set the charge voltage in item 19 to 53V.

Program 19 can not go below 54v, it refuses

31 minutes ago, Dyness said:

In order for the inverter to not alarm and sound, there are only two methods, one is to upgrade the software of the battery for communication, and the other is to use the US2 mode. In the US2 mode, the charging voltage and cut-off voltage can be customized.

Ok, I will try to set float voltage first then I try to set charge voltage back to 53.5

@Dyness I managed to use US2, customized float and charge voltage using the settings you gave me. We had an overcast sky until today, the alarm buzzed again, I took program 19 down to 52v and 20 to 52v again. Tried again and it buzzed, from my observation there's a software problem somewhere because the behavior is not consistent

@Dyness I managed to use US2, customized float and charge voltage using the settings you gave me. We had an overcast sky until today, the alarm buzzed again, I took program 19 down to 52v and 20 to 52v again. Tried again and it buzzed, from my observation there's a software problem somewhere because the behavior is not consistent

1 hour ago, Dyness said:

Is it the inverter or the battery that the alarm sounds?Is there any alarm on the inverter?If the above method does not work, you have to update the battery program. The battery update program can solve your problem.

The alarm is buzzing on the inverter

What was the last on this? 

17 hours ago, Tsa said:

What was the last on this? 

Thanks for the concern, I solved the issue by changing the inverter. I now have a sunsynk 8kw, not even one problem yet. The software is great