The JK app allows you to calibrate the overall battery V. So measure the V and then calibrate higher.How did you do that?
The JK app allows you to calibrate the overall battery V. So measure the V and then calibrate higher.How did you do that?
Your Vol. Cell RCV and SOC-100% Vol. are different on the two screenshots?Could someone take a look at my settings and let me know what should/needs to be changed, for some reason they never get 100%, they stop charging just short of 100% soc voltage. Here is a screen shot of the master battery and one of the slave ones. They are closed loop with my eg4 6000xp inverters.
View attachment 286948View attachment 286949
The issues are largely resolved in the latest firmware, 15.38. There are no safety issues and BMS performs its core function fine. The issue was the promise of a BMS that was supposed to communicate with your inverter in closed loop. For that to work effectively it needs to maintain the state of charge, and it will rapidly lose accuracy if you don't fully charge frequently. Even 1-2 days and I will see a divergence of anywhere between 5-15% against something I do trust (shunt) for state of charge.i was just pointed to this thread, sorry havent had a chance to read all 56 pages yet. is this still a do not buy BMS?
i currently have one running and it seems to be doing ok, but if there are serious issues, i still have time to return it via amazon.
thanks!
What do you mean closed loop? My bms does talk to the inverter via can, but not sure closed or open loop.The issues are largely resolved in the latest firmware, 15.38. There are no safety issues and BMS performs its core function fine. The issue was the promise of a BMS that was supposed to communicate with your inverter in closed loop. For that to work effectively it needs to maintain the state of charge, and it will rapidly lose accuracy if you don't fully charge frequently. Even 1-2 days and I will see a divergence of anywhere between 5-15% against something I do trust (shunt) for state of charge.
Otherwise, I don't think there's a reason not to use it. As someone else noted though, if you don't need closed loop comms with your inverter, there's a cheaper version of the JK that works fine. I have a couple of those as well.
Closed loop is talking to your inverter over CAN or RS485. The inverter and BMS communicate, charging is governed by the BMS.What do you mean closed loop? My bms does talk to the inverter via can, but not sure closed or open loop.
I do have some questions about some of the settings on it, can't seem to get my battery fully charged, one of the cells will hit my over voltage before the rest get a chance to balance, and it cuts off the charging
and also a latest video on his channel - review of NEW hardware version of JK inverter BMS (v 19 !)New android app on Andy's google drive https://drive.google.com/drive/folders/1uFhOtuyyUoMLVW3ow3IAklJLhkZXiARh
We need to find the official shop or website of JiKong themselves (not jkbms.net or .com which are reseller's) and order from them with , potentially, support availableAnd if they would accept only wholesale orders then we possibly establish a co-operative buyers organization and collect individual orders then place a wholesale order to JiKong. How about that idea? Then to have a technical support via our own representative. A tech guy who collect questions/requests and communicate with JiKong's engineers on behalf.
interesting, you feel like the bms controls are inadequate? i've found it difficult to charge my pack to 100% so far due to imbalance in the cells, one of the cells hits my voltage limit while the rest are like .25v away, so it turns off charging before being able to get the other cells up to level.Closed loop is talking to your inverter over CAN or RS485. The inverter and BMS communicate, charging is governed by the BMS.
Open loop is using voltage based control. So for me, even though I could have the BMS communicate with my inverters, I decided not to do that after a bunch of testing. I have a target bulk voltage - 55.6V, absorb at 55.2 for 1 hour, and float at 53.6. (Since my system is in continuous use, I don't 'float' much, I'm either charging or discharging).
What would you replace them with though, I'm not sure there is anything better out there. JK at least does release updated firmware regularly and overall mine are working well, just having troubles getting them to go 100%, most of them hit 99% (like .05 volts off of 100% voltage), I am sure this is a config issue or an inverter issue with closed loop. I may switch them all to open loop to test out that way.Watched Andy's latest video with V19 HARDWARE - Interesting. New Screen doesn't fit current openings if upgrading from the older Large Display so it means "cutting" the case to install it... How many people will want to do that or are even capable of doing it (tools/equipment or ability). Passing mention that V14/V15 works with it (good) but ZILCH on the Firmware for the V14 & 15 so are we being ORPHANED ?
Dunno about anyone else but I'm not about to spend more on a "maybe" and replace my fleet of BMS' again... Especially not as "fix" for their problems which they haven't fixed as yet... Andy didn't mention if the SOC accuracy is even working or not etc but that will follow as he indicated he'll be doing a few vids... Oh well no rush and NO FAITH in anything forwarded by JiKong/Andy - been down this Garden Path already...
Agree 100%. Yay, I screen I barely look at. And if you watch the video, basic stuff that should've been carry over is broken in firmware. Doesn't give me much confidence.Watched Andy's latest video with V19 HARDWARE - Interesting. New Screen doesn't fit current openings if upgrading from the older Large Display so it means "cutting" the case to install it... How many people will want to do that or are even capable of doing it (tools/equipment or ability). Passing mention that V14/V15 works with it (good) but ZILCH on the Firmware for the V14 & 15 so are we being ORPHANED ?
Dunno about anyone else but I'm not about to spend more on a "maybe" and replace my fleet of BMS' again... Especially not as "fix" for their problems which they haven't fixed as yet... Andy didn't mention if the SOC accuracy is even working or not etc but that will follow as he indicated he'll be doing a few vids... Oh well no rush and NO FAITH in anything forwarded by JiKong/Andy - been down this Garden Path already...
Maybe, you did not notice but I started this thread after a lot of bull fooey with JK. I also edited their previous manual's & docs and was heavily involved like others who got cold turkey'd by "the vendors & corporate".What would you replace them with though, I'm not sure there is anything better out there. JK at least does release updated firmware regularly and overall mine are working well, just having troubles getting them to go 100%, most of them hit 99% (like .05 volts off of 100% voltage), I am sure this is a config issue or an inverter issue with closed loop. I may switch them all to open loop to test out that way.
Exactly, my fleet of 8 BMS' V15 Hardware work OK in Open Loop (as I am not running an AIO) as I an NOT dependent on the BMS reporting accurate SOC. But also from end of March to October they get to 100% almost every day and the packs are always balanced tight (I allow for 0.005mv deviation not the default 0.010mv).Agree 100%. Yay, I screen I barely look at. And if you watch the video, basic stuff that should've been carry over is broken in firmware. Doesn't give me much confidence.
Mine are working, and they would protect if bad things happen. But the features I hoped for, well I've given up. And I'm not spending money to replace them with new stuff.
The BMS must have address 00 - main.Anybody knows why i can't see charge status and charge status time in the app bluetooth? App version 5.0.1, Hardware 15, software 15.38, android 14. JK-PB2A16S15P
With the new charging logic at v15.38 and following settings:
RCV=3.45V(55.2V)
RCV time = 0.3h(18min)
RFV=3.4V(54.4V)
RFV time = 2h
Emerg. time = 30min (what is this??)
SOC100%=3.4V
Can you explain this graph? Why is it entering float at 2PM and only for half hour? I tried putting 60min in Emerg. time setting but it will not accept anything higher than 30min.
View attachment 287701
is there somewhere that has a list of explanations for all those abbreviations?With the new charging logic at v15.38 and following settings:
RCV=3.45V(55.2V)
RCV time = 0.3h(18min)
RFV=3.4V(54.4V)
RFV time = 2h
Emerg. time = 30min (what is this??)
SOC100%=3.4V
Can you explain this graph? Why is it entering float at 2PM and only for half hour? I tried putting 60min in Emerg. time setting but it will not accept anything higher than 30min.
View attachment 287701
I'm sure there is, but I'll just type them here to make it easy:is there somewhere that has a list of explanations for all those abbreviations?
do you have smart sleep on or off ?I'm sure there is, but I'll just type them here to make it easy:
RCV = Requested Charge Voltage
RFV = Requested Float Voltage
SOC 100% voltage = State of Charge reset to 100% (You want this higher, more like 3.48V or so). I'll see if I can screenshot mine. Andy from Off Grid Garage has a good set of videos explaining these as well.
Start here. If you search his channel you'll find several.
Here's my settings:
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