February 20, 20233 yr Hi I have 4 x Dyness B4850 batteries installed in parallel with a Growatt SPF 5000 inverter. Two of these batteries about 3 years old with two newer ones. Newest, about 3 months old installed as the Master, with DIP settings at 0110, all the others at 0000. Second battery, adjacent to the master, only charging up to 75% (three green indicator lights) and also discharging quicker that the remaining batteries, see indicator lights on sketch, Master at the bottom. Please advise as to how to rectify. .
February 20, 20233 yr Author Hi, thanks a lot for the prompt feedback. Negative feed is in fact from the bottom battery, see photo.
February 20, 20233 yr Hi @GerhardvN Looking at the Dyness B4850 Battery Manual, p17 ( https://www.manualslib.com/manual/1987164/Dyness-B4850.html?page=19#manual), it shows the required settings for the various batteries (master and slaves). Hope this helps.
February 20, 20233 yr 9 hours ago, GerhardvN said: Hi I have 4 x Dyness B4850 batteries installed in parallel with a Growatt SPF 5000 inverter. Two of these batteries about 3 years old with two newer ones. Newest, about 3 months old installed as the Master, with DIP settings at 0110, all the others at 0000. Second battery, adjacent to the master, only charging up to 75% (three green indicator lights) and also discharging quicker that the remaining batteries, see indicator lights on sketch, Master at the bottom. Please advise as to how to rectify. . Are you able to read the SOH of each individual battery? If the SOC lights are so far out of sync in a paralell bank it indicates that the capacity of the one battery is significantly less compared to the others. Lower capacity is normally synonymous with a lower SOH. I see you batteries have no earth wire connected. I also don't think your dip switches are correct which means those interbattery RS458 cables are not doing anything (but I am saying this without knowing these batteries). If you are using communication between the inverter and the battery this might explain why the one does not fully charge. I would connect then up individually to the inverter (with the dip switches set correctly), charge each one full and then connect then back up in paralell (again with the correct dip switches) and see what happens. Edit: it is pretty normal for new and old batteries to discharge at a slightly different rate as each will have a different internal resistance. It should not however cause such a big difference. Edited February 20, 20233 yr by I84RiS
March 7, 20233 yr Author On 2023/02/20 at 3:17 PM, LoodPyp said: Hi @GerhardvN Looking at the Dyness B4850 Battery Manual, p17 ( https://www.manualslib.com/manual/1987164/Dyness-B4850.html?page=19#manual), it shows the required settings for the various batteries (master and slaves). Hope this helps. On 2023/02/20 at 8:46 PM, I84RiS said: Are you able to read the SOH of each individual battery? If the SOC lights are so far out of sync in a paralell bank it indicates that the capacity of the one battery is significantly less compared to the others. Lower capacity is normally synonymous with a lower SOH. I see you batteries have no earth wire connected. I also don't think your dip switches are correct which means those interbattery RS458 cables are not doing anything (but I am saying this without knowing these batteries). If you are using communication between the inverter and the battery this might explain why the one does not fully charge. I would connect then up individually to the inverter (with the dip switches set correctly), charge each one full and then connect then back up in paralell (again with the correct dip switches) and see what happens. Edit: it is pretty normal for new and old batteries to discharge at a slightly different rate as each will have a different internal resistance. It should not however cause such a big difference. Thanks
June 14, 20242 yr 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.
June 15, 20242 yr On 2024/06/14 at 8:31 AM, GGinelli said: I have 3 x BX51100s which after one month after installation started drifting out of sync. Well, I could also sing such a song. I installed the 4th pack of LEOCH 48100 TB a year later than the previous ones. Its BMS has soon gone out of sync although the currents are reasonable, considering it has significantly lower internal resistance. I do not attach too much importance to it as to me the pack voltage is the important reading. Also the individual cell voltage readings look normal, only one cell shows consistently a few mV higher than the others, but within tolerable range. The inverters manage the charging on the base of battery voltage and do it well. All packs show still 100% SOH.
July 31, 20241 yr 51 minutes ago, fnaude57 said: Good Day Is it possible to parallel a Dyness 4.8kWh with a Revov 4.8kWh? No as the Dyness 4.8kwh is 15 cell (Model: A48100) afaik and the Revov 4.8kwh is 16 cell. Edited July 31, 20241 yr by TaliaB
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