You can say anything you want about Chinese sellers but what alkaline said is fact. I learned it the hard way also.
If you just want to save 10-30€ per cell and buy grade B/used or whatever junk Chinese sellers sell then go for it. But stop posting on this forum that these sellers are the best...
I wouldn’t mind if I new beforehand that I was gonna get grade B while paying 80-90€ per cell. The thing that is happening right now with docan is straight up robbery. They completely scam people. some people are ok with it because the cells “seem to work fine” but that won’t be the case in a...
Check part of the description on grade B cells on NKON:
“B-grade cells are cells usually did not qualify as A-grade by the manufacturer. This may be due to optical imperfections, higher self-discharge, lower capacity and/or higher internal resistance”
Also:
“Lot of seller in china buy B-grade...
Here’s another QR. No, there’s not much variation between the 2 random picked cells. I don’t know whether it is a sticker or not. I”ll have to pull the whole black tape and I don’t wanna do that as I may have to speak with docan about it.
I do have their communication device for their cloud called any-bridge and it uses CAN communication for their own battery called anycell however i don't know if it uses the pylontech protocol
My inverter is a hybrid one.
My loads work with solar then battery then utility I have it to switch to grid mode at 48v it shouldn’t drain the battery.
My inverter doesn’t discharge the batteries it seems the problem to be the BMS or BMS being wrong due to the field
Update:
fyi: batteries don't pull full capacity through my inverter..
I did a dispute on Alibaba which did not go well. they asked me to talk with eve and confirm my batteries are grade B. I tried that with 2 emails but eve won't answer me back. I guess they want nothing to do with it.
The...
No have let them charge fully via sollar and set my inverter to not discharge them for 3-4 days to leave the integrated JK balancer do its job. Then I use them. I know it’s stupid but it’s the only way with the equipment I have now
Thanks for the reply.
I just want to help others and make this thing stop.
I haven’t got any money back and I don’t know if I ever will get anything back
About capacity I can only get around 12kw - 240ah.
I did try to resolve everything with docan, or alibaba and now I am trying to do the...
mine is just a voltronic inverter that supports CAN but under battery settings menu there are all named as "05" which indicates they use rs485.
see here also bms-communication-cables-with-solar-inverters-voltacon-lithium-ion-li-2021-2-4kwh-and-us2000-pylontech
any help?
Hi!
I live in Greece and I have a phocos 5kw 230v inverter. I have it with some diy lifepo4 battery plus a jk BMS without communication from BMS to inverter. I have some voltages set to switch the phocos/voltronic from off grid to grid mode, but I’ve seen that when it switches from off grid to...
Hello! I was out of the forum for some time so I didn’t get your message on time. I see you’ve made a great interesting topic.
I don’t have an ESP32 but I can order one and let you know. I will have to also order the adapters for the JK BMS. Do you have the latest FW to flash when they arrive...
Docan told me the app took the barcode wrong. It seems it didn’t see the number ”1” in there. So they might be ok.
I don’t know how is this possible as I scanned 2 cells in a row. What do you guys think?
So it did it again. BMS cut off the battery due to the same error. Voltage pack was dropping while I didn’t use the battery. It’s like it’s self discharging.. any thoughts?