Why are you start balance at 3.35v? There’s no benefit of balance anything below 3.4-3.45v, due to the flat curve. Real balance starts when cells are near full. Otherwise you keep shunting current in the flat curve, for no reason.
Hey Aurel, that's a good point. For now I have it on 3.35 because I haven't done topbalancing (on purpose). I noticed a few cells had less charge then others, so started balancing at 3.35V. In the future I might increase it to 3.4V. Will make a follow up movie 🎬 about this. Thanks again for the feedback.
Hello , first sorry for my English, I have a jk bms ,it is 0.6a of balance ,my battery is lifepo4 60v , 20 cells , but I have 3 of this cells with 3.5v and 17 with 3.3v and the bms cut the charge when one of this 3 cells get de maximum voltage 3.7 approximately and the other 17 cells never get a fully charge, do you thing that the bms itself is capable to balancing this 3 cells that have a bigger voltage? , and what parameter do you think that I have to write in the START VALANCE VOLT .( V ) in the settings, thanks I hope you can help me
@@projectv8639 hey, 3.3v means your 17 cells are anywhere between 30 to 60% charged. I wouldn’t want to wait for my BMS to balance 17 cells 😂, could take months. I would either try to top balance them or discharge the 3 full ones down to 3.3v.
Andy's Off-grid garage recommends not to balance below 3.45v to ensure being into the steeper part of the curve. Most specs say max cell voltage is 3.65v not 3.7v.
2 месяца назад
I have 4 different Android devices and none of them can install the app to access the JK BMS controllers.. Had to use a Windows 11 Pro laptop to program them and bring the 30kw of batteries online.. The controllers themselves seem to do their job and keep the cells in line but the compatibility of the app is very lacking and it is not that big or complex of an app.. I think it has more to do with security and whatever silliness is going on there.. I wish they would just spend the extra 50 cents and install a Wi-Fi chip that has its own local network homepage built in like routers have..
I have a question, My 2x JK-BMS (JK PB2A16S20P) are configured to let my victron multiplus 2 (3x / 3 phase) load my 2 batterypacks (16x320Ah LiFeP04 Cell) (JK BMSes connected to eachother, then 1 can cable to the Cerbo GX. My Charging (absorption) voltage is about 54,7V with high current for an hour, and then raises to about 56,7V with low current. Thats the wrong way in voltage!?? Cerbo is set to DVCC Mode. My most important BMS settings are: Cell OVP: 3.65 V Vol. Cell RCV: 3.6 V = 57.6 V SOC 100% Volt: 3.55 V = 56.8 V Cell OVPR: 3.54 V Cell UVPR: 3.02 V SOC 0% Volt: 3.0 V = 48 V Cell UVP: 2.8 V Power off vol: 2.65 V Vol. Cell RFV: 3.50 V = 56 V RCV time: 1.0 H RFV time: 6.0 H Someone can help me to get this right? My thougths are first high voltage and amps absoption, then lower voltage and amps for float? What settings in BMS do i have to change?? Many thanks for reading this,
Hey Franky, quick question, What would be the settings for a 72v (84v) battery pack built with this. " 26650 Liitokala, model Lii-50A, 5000mAh, 3.7v, max 4.2v, min 2.75v with120 cells I check the xsl file for the BMS parameters and is great to be able to understand what all those settings mean but not sure what should be the parameters to use. great content and well explained! Thanks in advance!!🙏
Not really sure what 30A+30A means. is it the capacity of your lifepo4 cells? If so charge both banks with 30A (= 1C). Always good to check the spec sheet of your batteries. In my case battery bank is +1000Ah so there's no limit in charge current as I will never charge above 1C, it's more like 0.1C Frank - EASYPOWERWALL
Good evening, Thank you for all the videos and all these explanations. I have a problem with the JK BMS connected with a Growatt hybrid inverter and a 16S Lifepo4 battery, the SOC drops from 60% or 50% to 1% in less than a minute. The batteries seem correct to me. How can I solve this problem. Thank you for your feedback. Pascal
Thanks for walking me through the jk setup and the settings spreadsheet. I also didn't receive the one page doc with the BMS. My system is only 3200w inverter, 4800Wh LiFePo4 Battery. To save cost I got only a jk with 80A and 0.6A balancing. I have still a 4A capacity Balancer and will run both at the same starting Voltage. Have installed also a cell meter 8 to have a constant view at my Inverter. The 2 and 4A jk BMS are so costly now. My 80A version was only 50$. Hope to be able to slowly maximize my capacity as I have limits uning only 1440W Solar panels and living in the Highlands of Mindanao, Philippines with more clouds and rain. This is my first solar setup and as a retired electric and IT technician, this project keeps my gray cells busy even at age 71.
Thanks for the great feedback. We all started with a smaller setup en let the system grow. Keep up the good work and stay healthy and strong to enjoy the green evolutions as long as possible. Franky - EASYPOWERWALL
Hi thank you for all the information 👌👌👌 I’m getting a 100amp jk bms for my ebike and I will be getting a bigger controller in the near future but for now can I limit the bms to 70amp output to match my smaller 60amp controller that I currently have .
Hey, thanks for asking a question. Sure you can limit the maximum current of your BMS. Go to settings and go to advanced settings. Search for "Constinued discharge Current" Enter the desired value. It's in the clip at 19:00. Good luck. Frank Easypowerwall
Hey Petes, you can download it here: docs.google.com/spreadsheets/d/1gi-kW6oebZURiijmcprc_71EN35_F0Hs/edit?usp=drive_link&ouid=108566133728311424796&rtpof=true&sd=true
If you run 2x JK newinverter BMS in parallel, and connect it to Deye (or some other inverter with CANbus), does the SOC be reported in the inverter from the Main BMS, is a mix of pack 1 + pack 2?
The reason for the BMS can turn off balance can work like you said to use an external BMS but also to prevent that the BMS discharge the battery since even with BMS power off, balance keeps running, if you have a bad cell you will end with a discharged or lower state of charge and that is not good for an battery in storage.
Thanks for your reply. Have balancing on from 3.35 (changed setting to 3.4). So when battery is low balancer will not be active and will not drain battery. That's why it's important not to balance all the time, only when voltage is > 3.4V. Have a nice day. Franky - easypowerwall.com
LifePo4 battery don't have the "memory effect" we know from older type batteries. You can charge whenever you want. In an ideal world I would try to keep my charge between 20 & 80%. If you need the extra energy you can charge to 100% before leaving the house. Hope this helps Franky - EASYPOWERWALL
Hey....thanks for your reply. I don't agree with the settings you suggest. I never charge my cells above 3.5V It doesn't make sense....there's only marginal capacity gain. 1% or less. Make sure to read the specs of your batteries.
Hey, have you watched the movie? I invest quite a lot of time to create this content. I'm entering the pasword during the movie.....and the manual (one pager) is available as download in the comment section under the video. Franky - easypowerwall
Hello Franky, this is really wonderful. Everything is meticulously detailed. I was able to initialize my 2 JKBMS JK-B2A8S-20PC with my 2 12V 280 Amp battery packs, it's great. There is just one small detail, in addition to the Bluetooth on my phone I also have the control screen. (The large model). The batteries are fully charged, but it only shows 78 percent charge. Perhaps this is normal and we will have to wait for the cycles to complete and for the battery and settings to gradually improve. If you could reassure me on this point that would be great. Many thanks again for your video, it’s great. Dominic
Hey Dominique, thanks for your great comment. To initialize/reset soc of 100%, your cell has to hit the "cell overvoltage protection" If it cycles a few times it will sync and you will get the 100% SOC number. Good luck. Franky
Did you ever check the power consumption of the JK-BMS? This is an interesting number as you will typically use this all the time. I found values from a few 100 mW up to 3W and even more. I also found some extremes with 30W and more but i doubt this, probably faulty. Anyway, if its in the 1W+ region it will draw 150 Wh a week or more! Thats already a lot, when the battery just sits idle in a few months (in winter e.g.).
How does Calibrating Current work? My JK is reading ~30% low at low loads (showing -1.7A when real draw is -3.3A). And about 50% low at high loads (showing -60A when real draw is -110A).
Thank you for this. I have a question. The nominal current is confusing to me. If a battery pack is 48v / 280ah and we have 4 packs = to 1120AH I would need 4 x JKB2A20S ?? -C-H Is the nominal current based on the total AH of the pack so i would need to 500ah version ?
Hi, My battery bank has 4 16S configurations. I installed a BMS on every 280AH battery (16S) So a 200AH BMS is OK....no need for 500AH bms. Hope this helps.
I have jk bms 200amp, it worked fine for 30 mins. Then automatically turned off. I tried to wake up as usual with push button but not starting. Tried with 9v battery not starting, also tried with diod mode , no result. I can see little light in push button switch if i hold it. Please help.
Hi, If you have the model with the push button, then there's no need/use to try the alternative options. The switch should do the trick. Just check that the overal voltage en single voltage is high enough. It might be in hibernation mode because there not enough juice in the battery. Connect a charger (charge slow) and try to boot again. If it's not working, you might have a faulty BMS.
Thanks for the video. You mention on/off switch and old/new version at the beginning of the video but I couldn't see it. Did your BMS come with an external on/off switch, did you mean that?
Hi, check the video 5:45 where I'm gonna push the on/off switch. Older models don't have this swith and you had to apply 5V to start the BMS. If you click on the link under the video to order the BMS you will receive the latest model with switch included. Good luck. Franky - easypowerwall
I do. Used to have a 14S 240P 18650 powerwall. See www.easypowerwall.com. I used batteries between 3.4 and 4V. Started balancing at 3.9V Good luck. When time is on my side I try to make clip about the 18650 PW.
User Private Data is where you can add ur own label or name to a system or battery pack BMS and helps you to identify which BMS you are linked to at anytime when u have more than one. I have 2 batteries on a bus setup, so I have labelled them Bus Batt 1 & Bus Batt 2 so I know which one I am connected to.
Thanks for the information. Will check it out and add it to the follow up video that I'm plannen in the future. Have a nice day. Frank - easypowerall.com
hi! I wiredmy 7S70P 18650 setup to a JK BMS. I have a switch with leds to turn it on. It turns on as BT can be connected but status LED on switch button akways RED, cells are at 3.6V each and I only give about 1 Amps to "charge" for test it out. Why is it red status? Whats wrong?
Hey, the led in the switch is always red. It's there to show the switch, not to indicate a status of the BMS or battery. Hope this helps. Franky - EasyPowerwall.com
@@easypowerwall thanks! so red is good. It works now since days. The thing I don't find how to measure the real capacity of the battery, I have lots of used cells and only set Ah setting with guesstimation. How can the BMS measure real capacity?
Hey Seymour good question. Should have addressed that in the movie. But I can confirm that each BMS works perfectly fine when accessing separately. The application shows all four BMS and you select which one you want to check. No lockups, ne freezes like I once saw on the @TheDigitalMermaid. Will make a BMS follow up movie where I will show how (well) it works.
Hey Luc, good question for the follow up video. But the answer is pretty simple. When connected to BMS, slide to right towards "settings" where you have to enter your pasword. Now change from technology Li-ion, LTO, ....and this will reset the BMS to factory. Then switch back to the technology you want to use and apply the setting you want to use. Good luck Franky - www.easypowerall.com
Very interesting your video. Congratulations. My question for you is, do you know an app for android or windows whitch let me to get a csv or excel file with individual cell values? in other words, each value read for each cell at one moment, but not just read in graphic mode , i need the value into a file for research purpose. thanks and a Best regards from Argentina
Don't know by heart, but good question. Maybe it's possible with analog/digital converter + arduino. Challenge is that you need at least 2, preferably 3 digits after the decimal point. If something popsup I will add it to the follow up video. Frank - easypowerwall.com
Good clear explanation. I just ordered 48 cells and was contemplating which brand bms to use. I think you have me leaning toward jk. Thanks for sharing.
I have three of these JK bmss and the challenge I have with monitoring them is that I have to go into the room where the power control cabin it is and use my smartphone to read each one. There seems to be no way to extend the Bluetooth range so that I can monitor from another room.
I understand your frustration. But a BMS is not something you should monitor all the time, we have the shunt to monitor the SOC and the state of battery. It's like monitorring the fuse of you breakerbox, you don't monitor them either. But I'm working on a solution to monitor the BMS, if it works I'll share it with my followers. Have a nice day. Franky
@@tiborchren does that run on a PC with bluetooth? I can only monitor one BMS at a time and have been leaving my phone in the battery room linked to Windows until its battery dies. There must be a better option.
I have my system connected with RJ45 to a Raspberry Pi & sending the information to a web page so I can view it from anywhere. The JK uses RJ45 to communicate. I don’t see why you couldn’t view its information also.
@@MistaTerps My BMS are inaccessible, physically, without moving a 650lb battery cabinet. I'm looking for a bluetooth solution that would enable me to repeat the signal over a larger distance so I can monitor in another room.
