New JK Inverter BMS Review + Test with Sunsynk Inverter

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CAN communication with inverter, Current Limiter, Programmable relays, Active balancer... basically an All-In-One perfect BMS??
I also connect the JK Inverter BMS to a ‪@sunsynk‬ Sunsunk Inverter using the CAN bus communication.
In this video we look at what you get int he box, discuss the specs and features, briefly look through the app and what information is displayed on the screen and take a closer look at a few BMS settings like:
- Vol. Cell RCV(V) Requested Charge Voltage
- RCV Time (H) Requested Charge Voltage Timer
- Vol. Cell RFV (V) Requested Float Voltage
- RFV Time (H) Requested Float Voltage Timer
- SOC-100% Volt. (V) State of Charge 100% reset voltage
- SOC-0% Volt. (V) State of Charge 0% reset voltage
- Disable PCL Module (When this switch is on, it disables the built-in current limiter)
- Charge and Discharge current limit settings
The JK BMS has built-in Bluetooth that connects to the JK BMS App, various Display screen options, Charge and Discharge control, built-in protections for current, temperature and voltage... this JK Inverter Battery Management System (BMS) seems to have it all.
⭐️⭐️⭐️ OTHER VIDEOS ⭐️⭐️⭐️
🧰 How to Downgrade firmware on JK Inverter BMS • How to Downgrade firmw...
🧰 Testing Limits of JK Inverter BMS • Testing limits of JK I...
🧰 Hot to connect JK BMS to SunSynk Inverter • Connect JK BMS to SunS...
🧰 How to Upgrade firmware on JK BMS • How to Update Firmware...
🧰 Review of the original JK BMS • New JK BMS and SCREEN ...
🧰 JK Screens compared • JK BMS Screen Comparis...
Andy from ‪@OffGridGarageAustralia‬ does a great job of explaining all the settings on this BMS... here is a link to his video • The new JK Inverter-BM...
If you want to read other reviews or buy one of the other style JK BMS's, here is an option 👉 amzn.to/3yy7lAH (make sure to select the correct model that you need)
I bought this BMS from lithium-cells.co.za/ in South Africa
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7 апр 2024

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Комментарии : 39

@rcinfla9017 7 дней назад

It is important to understand the RCV and RFV settings are just requests sent to inverter/charger to adjust the inverter/charger's charge parameters. The inverter/charger is still the master regulating actual charge rate. If inverter/charger does not understand the BMS requests due to inverter/charger not having the proper RS485 or CAN physical interface and matching comm protocol with the BMS, the requests will not be executed by the inverter/charger. The BMS does have a DC to DC converter (big toroid inductor visible) across the charge disable series pass MOSFET's. When charge MOSFET is disabled the DC to DC converter can activate allowing 0 to 10 amps charge into battery. This is helpful near full charge state where too much cell imbalance would cause a full charging shutdown due to a cell overvoltage condition. BMS can fine tune the charge rate down to low level still allowing balancing to continue but preventing a cell overvoltage shutdown by reducing charge rate. There must be comm with inverter/charger to use this because inverter/charger without BMS comm will likely interpret charge current drop off as a fully charged battery and drop inverter/charger down to float mode charging voltage level. During this BMS buck converter charge rate reduction it tells inverter/charger to maintain an absorb voltage level charge voltage.

@hendersonsobers396 2 месяца назад

Found this channel just now. Really good content- great job. I'm looking forward to further JK firmware updates to support other inverter brands like Luxpower. Also, I know this will more than likely require a hardware change but would be awesome if JK BMS' had wifi to allow the BMS to be monitored over the internet similar to Daly.

@GrantBurton 2 месяца назад

Thanks very much. I'm sure over time they will update and add support for other inverters... let's hope. I guess adding wifi monitoring is possible with a sort of 'wifi adapter' that plugs into the RS485 port, which pulls all the info and uploads to something like home assistant (or the JK app if its hardware made by JK). A couple weeks ago, I remember reading on one of the forums about somebody having programmed an ESP32, which plugs into the BMS RS485 port and draws the BMS info and streams it to Home Assistant... so i guess it could be indirectly monitored through Home Assistant.

@ticknguyen 22 дня назад

Please make a tutorial video on how to connect and communicate between two JK BMS through the RS485 port.

@GrantBurton 21 день назад

Hi, you should just be able to plug an ethernet cable into the RS485 parallel port on each of the BMS's and it works. This video might also be of interest about how to connect up the communication ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-iXuFI8-lFQ8.html

@alanblyde8502 Месяц назад

Great vid mate, hi from downunder 🇦🇺🤙

@GrantBurton Месяц назад

Hi Alan, hello and thanks very much... have another two JK Inverter BMS related videos out already, and currently working on a fourth video, hoping to have it out over the weekend.

@stevenfrazier8939 День назад

I bought 4 Apexium DIY battery kits with the JK Inverter BMS PB2A16S20P. The first one I built had a bad BMS right out of the Box and it looks like Jkung is not going to replace it. 34 days have gone by without a commitment to replace it. This is not good after sales support.

@ZenInnovations 2 месяца назад

Hi Grant, Can you help me confirm a bit about the Dry contact relay settings? I need the BMS to activate the relay at certain SOC % And turn off the relay at certain SOC % Say I want to turn off the inverter Mains input as soon as Battery SOC reaches 70%. And then reconnect to mains as battery reaches 20% SOC. I mainly use solar for power saving. Thanks.

@GrantBurton 2 месяца назад

Hi, I think it may work. The dry contacts are Normally Open (NO). There are three settings for triggering these relays... Trigger, Trigger Value and Release Value. I tried the following -> Trigger set to 'Low SOC' and Trigger Value set to 21 and Trigger Release set to 69, the relay closes when the SOC reaches 20 (i.e. drops below the Trigger Value of 21) and the relay opens again when the SOC reaches 70 (i.e. rises above Release Value of 69). You'll likely have to use a contactor to reliably connect / disconnect mains input over a long period of time.

@ZenInnovations 2 месяца назад

@@GrantBurton wow thanks for confirming. I'll probably use the dry contact to trigger a 2nd, much beefier relay which can take the mains load comfortably. Then use it to switch mains. Though I wish they should have given low soc as well as high soc trigger to make it even more flexible. BTW one more thing! Can we manually override or switch these relays using the mobile app? Say if I need to activate mains for charging?

@GrantBurton 2 месяца назад

@@ZenInnovations A workaround may be to use the Low SOC triggers to drive another relay with NC contacts... So when the Low SOC relay releases, the additional NC relay loses power and thus closes it's contacts acting like a High SOC trigger? and when the Low SOC relay triggers, the additional NC relay energises thus opening the additional NC relay contacts. Probably easier for JK to just add the feature in software though. I don't think the relays can be manually triggered (like with a software switch)... I'll need to have another look though.

@user-fv6tf2ef2b 9 дней назад

Hello . sorry for my bad English.i just received this model and victron multiplus,mppt and cerbo.is this bms only for DIY 48V box or can i work it with my cells without box? Thank you

@GrantBurton 8 дней назад

Hi, JK Inverter BMS should be able to work with the Victron Inverters 👍 Andy from the Off-Grid Garage channel does a lot of testing with Victron inverters and the Jk Inverter BMS.

@kennyrodg 2 месяца назад

Well this is a bit annoying...I was advised to go with a Seplos BMS as the JK will not work with my Sunsynk ECCO Inverter....I'd have much rather gone JK as well....Bugger ! I'll get the JK now and see if i can return the Seplos. Thanks for the vid.

@GrantBurton 2 месяца назад

Hi, I wonder if the @sunsynk ECCO inverters use different communication compared to the 'normal' SunSynk inverters. I've only has the JK Inverter BMS connected and communicating with our SunSynk inverter for a couple days now... so far, everything seems to be working but its still early days I guess. I am busy working on another video on how to connect the JK Inverter BMS to the SunSynk Inverter using CAN Communication, and showing the information it displays and testing how the Charge and Discharge Current limits and Charge Voltage Limits interact with the Inverter... should be out in another week or two (hopefully).

@kennyrodg 2 месяца назад

@@GrantBurton Hi Grant... Thanks for the reply, a video on how to connect the JK using would be extremely helpful.....I'll look forward to it...Subbed.

@GrantBurton 2 месяца назад

@@kennyrodg Guess I'll have to get stuck in then... haha. Thanks for the sub.

@kennyrodg 2 месяца назад

@@GrantBurton Yep, there's nothing else for it mate lol....Deep dive imminent !!!! On a serious note though, It'll help a lot of users as there's not much out there when it comes to diy batteries and Sunsynk playing nice together...it'll be much appreciated.

@panospapadimitriou3498 Месяц назад

it is a nice piece but never forget to do the correct updates... did not updated mine yet

@GrantBurton Месяц назад

I was running firmware version 15.11 (on hardware version 15 or the JK Inverter BMS) but noticed SOC wasn't aggregating correctly with 2 batteries in parallel, but everything else was working well. I've upgraded to 15.17 and set 002 - PYLON-Low-voltage-V1.2 as the CAN protocol to communicate with SunSynk Inverter and everything so far seems to be working. I haven't run anything before firmware version 15.11 but I've heard of a few people reporting problems with earlier firmware versions... so maybe it's a good idea to update to at least 15.11? (or the equivalent firmware version if you have Hardware version 14 of the BMS)

@panospapadimitriou3498 28 дней назад

@@GrantBurton i m experementing with the late version of the older b series with balancer right now.. i hope the inverter one locks the cold parameters better !!! long term problems.... it doesnt accept 123456 code unless i force it again without erase the numbers.. .... hope the new bms doesnt have that anoying bug .. i wont update my old one for those 2 tiny problems but wishes it doesnt show more bugs

@GrantBurton 24 дня назад

@@panospapadimitriou3498 I think there were problems with the old firmware on the Inverter BMS, but those bugs have now been fixed... at least from 15.11 onwards that I know of. The password on the new BMS doesn't seem to be giving those problems on hardware version 15, but I do remember hearing some people were experiencing password problems with the old style JK BMS. I used two of those older ones for over a year and didn't experience any problems luckily.

@mahdeyousif5399 Месяц назад

Greeting How to value recommend for jk bms setting For battery litheum 51.2vdc (16 cells 307 Ah

@GrantBurton Месяц назад

Hi, the values you set depends on the specifications of the battery cells you are using, so best is to check the data sheet for your cells and make sure none of those limits are exceeded. Credit to Andy from Off Grid Garage... I started using the settings he talks about in his videos, but I set my own charge and discharge current limits appropriate for my cells, and over time make small changes to suit my exact setup... but I generally lean towards safe / conservative settings and not settings that run right up against the limits.

@mflo1970 Месяц назад

Lo tengo pero no comunicado pero de momento funciona fenomenal

@GrantBurton Месяц назад

Thanks for your comment. I also used the previous style (non-inverter JK BMS) without communication for over a year and it also worked great. What inverter are you using?

@mflo1970 Месяц назад

@@GrantBurtonestoy usando un multiplus 48v 5000w

@GrantBurton Месяц назад

@@mflo1970 Victron make great quality products. Have you checked that the CAN High and CAN Low wires are going to the correct pins on whatever is handling your communication (probably a Cerbo GX?). I think on the Victron systems, CAN high is on Pin 7 and CAN low is pin 8 but on the JK BMS, CAN high is Pin 4 and CAN low is Pin 5 so a standard ethernet cable won't work. You may have to make up your own cable.

@mondotv4216 Месяц назад

@@GrantBurtonYou can also buy one off Victron. Victron can work with the Pylon protocol. Not sure if JK has Victron specific protocol. BTW loved the video. You sound like you're a professional presenter?

@GrantBurton Месяц назад

@@mondotv4216 Hi, there is a Victron CAN protocol that can be selected in the JK BMS app... I think it is 004 - Victron_CANbus_BMS_protocol_20170717. Thanks very much for your comment. I'm no professional presenter, just an average guy... but thank you.

@Greg-bx4id Месяц назад

good vid

@GrantBurton Месяц назад

Hi Greg, thanks very much.

@user-dy2lr8tg3s Месяц назад

hello, is it possible to use this new-style BMS on electric bicycles

@GrantBurton Месяц назад

I’m not 100% sure what all the requirements for a BMS on an electric bicycle would be but I guess it would work… it basically has all the same functions as the other ‘non inverter’ BMS with a couple of additional features… but I don’t think these extra functions would need to be used. The downside is that the Inverter BMS is much larger and I would think that space on an electric bicycle is at a premium. Are you busy building an electric bike?

@user-dy2lr8tg3s Месяц назад

I ordered on Aliexpress a few days ago, it is already on the way, after I realized that it is designed for solar panels and performs a lot of functions, now I will have to study the bms before connecting

@user-dy2lr8tg3s Месяц назад

Anyway, thanks for responding.

@GrantBurton Месяц назад

@@user-dy2lr8tg3s It's a pleasure... let us know how your project turns out.

@user-dy2lr8tg3s Месяц назад

I will definitely tell you, but it won't be soon.