Testing limits of JK Inverter BMS with SunSynk (Deye) Inverter

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Testing the Charge and Discharge Limits of the JK Inverter BMS's connected to a ‪@sunsynk‬ Inverter using CAN communication. It's been up and running for a while now and seems to be stable and working well.
I am currently running firmware version 15.11 on both JK BMSs. I had firmware version 15.17 installed on the JK BMS but it didn't seem to be working properly with the SunSynk Inverter when set to the 'Deye' CAN protocol... I explain more about the problem in a previous video 👉 • Connect JK BMS to SunS...
⭐️⭐️⭐️ OTHER VIDEOS ⭐️⭐️⭐️
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11 май 2024

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Комментарии : 54

@kennyrodg Месяц назад

Thanks again Grant....You're doing a fantastic service for all Sunsynk users with DIY batteries...Top man !

@GrantBurton Месяц назад

Thanks very much, will try do a couple more of these videos between the other content on the channel.

@captainobvious9188 День назад

I’ve been using a Deye 8k with the first balancing JK BMSs and a battery made from three first generation leaf battery packs since 2020. I’ve just used voltage mode on the Deye while setting the AH the same as discovered on the JK-BMS after doing a full charge cycle, and it has been really accurate on matching the SoC itself. I want to try battery communication emulation with solar-assistant.

@panospapadimitriou3498 Месяц назад

best test ever .. right nowdays my test reached similar questions with the older jk and my battery is so small... only 90amp 48v setup.. always full .. or at least 90% safely full . which comes extremely fast even with 6 panels 240 watts if no loads... i was planning to setup my new inverter bms for that extra 10 amp barier feature and those relays to operate my fans to the server box ~~~ KEEP up

@GrantBurton 25 дней назад

Thanks very much. If you are connecting communication between your inverter and BMS, then the max continued charge current set in the BMS should be reported to the Inverter, and the Inverter should be able to properly manage charge current up to that limit. I think the 10A current limiter function is more applicable (or one of its use cases) is If you are connecting batteries in parallel and not using any communication between batteries and Inverter. If that is the case, then you would have to set the max charge current on the Inverter manually, and if you want fast charge, set the charge current high enough to charge both batteries in parallel. The problem comes in if one of the batteries (BMS) disconnects, then the full Inverter charge current will be going into the other battery. That will quickly exceed the BMS charge current limit, and I think this is where the 10A current limiter will kick in. Let us know how it all works out once you have done the upgrade.

@calvincoetzee7036 18 дней назад

Awesome work

@GrantBurton 18 дней назад

Hi Calvin, thanks very much.

@rv10flyer84 27 дней назад

My two Sol-Arks have been running great, controlling limits fine without comms for over two years completely off grid with 170kWh diy LFP, mostly earlier model JK BMS’s, 32kWp, 10kW LP Gen for backup.

@GrantBurton 26 дней назад

Thanks for letting us know… I’m sure there are still many people running the older JK BMS without any issues. I also ran two of the older 150A JK BMS’s for a year without any comms and they also ran perfectly well, but decided to give the JK Inverter BMS a try.

@rv10flyer84 26 дней назад

@@GrantBurton I have two battery boxes, new jk BMS and 32 314aH cells coming from Jenny Wu from Docan Tech.

@GrantBurton 26 дней назад

@@rv10flyer84 Awesome, let us know once everything arrives and what you think of it.

@ipstacks11 10 дней назад

@@rv10flyer84How much is something like that setup? I hope you don’t mind me asking.

@rv10flyer84 10 дней назад

@@ipstacks11 Like a brand new 3/4 ton 4wd quad cab truck without the taxes, maintenance, repairs and no electric bill.

@Mylifelovingit Месяц назад

Very interesting

@KarlBotha Месяц назад

Awesome!!!!

@GrantBurton Месяц назад

Thanks you.

@DipanjanDas23 28 дней назад

Hi Grant thanks for bringing us this video can you please tell me the BMS software version you are using while making this video ?

@GrantBurton 28 дней назад

Hi, thanks very much. I showed the BMS firmware version at 13:10 in the video. It's V15.11

@PhilippeCJR 10 дней назад

Can you make a video how to smart instruct the Deye? Like with HomeAssistant, and a dynamic hourly grid contract? (a bit like solarassistant)

@GrantBurton 6 дней назад

HI Philippe, I might look at doing something like that in the future (maybe)... will have to see how things go, I'm not expert at Home Assistant. I think there are a few other videos on RU-vid about the Sunsynk integrations into Home Assistant already.

@benschippers3782 Месяц назад

So..... what would the best settings be? Building three 15kw battery's with JKbms's for a Deye Hybrid inverter.

@GrantBurton 25 дней назад

Hi Ben, the settings would depend on the specifications of the cells you are using and how hard you want to use the cells / battery, and how much headroom you want to leave for protection. I've been somewhat conservative with my settings. As an example, some of the basic settings I have been using on my battery setup: - RCV of 3.45v/cell - RCV Time of 1 hour - RFV of 3.35v/cell - RFV Time of 10 hours - Start Balance voltage of 3.45v/cell - 100% SOC of 3.449v/cell - Charge / discharge current would depend on capacity of cells. - Over voltage protection of 3.65v/cell - Over voltage protection recovery of 3.448v/cell - Under voltage protection of 2.6v/cell - Under voltage protection recovery of 2.65v/cell - Power off voltage of 2.5v/cell The settings listed above may not be correct for anybody else's battery / BMS though. As for the best settings, or the specific setting each person should use for their specific battery / BMS... I think those settings should be decided by whoever is building or setting up the battery (BMS) because mistakes could end up causing damage and being costly.

@ipstacks11 10 дней назад

I have 2 Deye 8kw inverters, in parallel, and 6 200ah 48v batteries with all the negatives tied together and same with the positives which is also in parallel, I am pretty sure. I want to add batteries and the installer said the batteries I have are 280v, which is referring to the cells in the batteries, I think. Anyway I want to add batteries that aren’t the same as these because the ones I have aren’t available anymore. It looks like if I put JK BMS’s in the batteries and connect them all on the canbus, then dissimilar sized lifepo4 batteries will work because the JK BMS will protect them from over/under charging/voltage. Does this sound right?

@GrantBurton 10 дней назад

Hi Jeff, I'm not exactly sure because I've never tried this myself.

@kennyrodg 13 дней назад

Hi Grant. It's taken me a while but i finally got my battery built a couple of days ago. Had multiple issues with terminals shearing off my batteries but that's a conversation for another day. It's seems to be working well apart from one issue. So, 280ah cells with a JK 200a inverter bms running 15-11 (thanks for all the tips on how to do the firmware upgrade btw ) It's talking to the Sunsynk Ecco inverter just fine. I've followed both yours and Andy's settings to the letter but I cannot get the RCV below 3.555v without getting a send / logic error. I've tried on the phone app and with the pc connected. Any thoughts on why this might be happening ? Thanks.

@GrantBurton 11 дней назад

Hi, thats great news that you finally have the batteries built (not so great about the sheared off terminals). You mentioned you have followed Andy and my setting exactly but just to check... What is your SOC-100% Volt and Cell OVPR set to? These values need to be set lower than the RCV that you would like.

@kennyrodg 11 дней назад

@@GrantBurton Good Morning Grant. So, my bad....I think. I just double checked and my SOC-100% was 3.499 when it should have been 3.449. OVPR is 3.448. I guess I couldn't see the wood for the trees lol. Thanks for the prompt to check it though, it's now accepted 3.450 as the RCV. I guess my version of following things "to the letter" did not pass muster. As ever, very much appreciated.

@GrantBurton 11 дней назад

@@kennyrodg Awesome, glad you are now sorted. Not to worry, that has also caught me out a few times already.

@ThePonderi Месяц назад

How does the surge capacity work with these limits setting?

@GrantBurton Месяц назад

Hi, do you mean how much the battery charge / discharge current could surge past these limits before the current is brought back to the limit? I'm not sure how much or how quickly the Inverter / charge controller would react to massive surges, but I guess if it goes to far to quickly, it will just cut off. I haven't (and can't) test the surge capacity of the 150A BMS's I have... According to JK's website, they can supposedly handle a surge of 300A for a 2 minutes.... thats way more than my capacity of batteries could handle. I'm not sure is there is a surge limit percentage that would apply above the Continued Charge / Discharge limits in the BMS, but that might be a nice feature. If you have a high current capable BMS (200A) but only want to use a low charge / discharge limit like 50A, and if passing 100A surge, it must immediately cut off no matter what, but between 50 and 100A the Over Current Protection Timer (and current limiter for charge) is applicable.

@divanmeyer-wv7pk Месяц назад

Where are the stockkars video's???

@GrantBurton Месяц назад

Hi Divan, time and resources have been a bit limited lately so I've had to take a step back from that.

@zoheb4you2002 Месяц назад

I hve the same inverter in my case my jk bms is passing the current even in off mode...bms as soon has reached the lower voltage it shutdown but still it passing the voltage and my battery voltage is reaching 0 %

@GrantBurton Месяц назад

So in the JK BMS app, on the Control tab, if you set the Discharge setting to 'OFF', does it still allow the battery to discharge?

@zoheb4you2002 Месяц назад

@@GrantBurton unfortunately yes 😥 rest of the two switch charge and balance is following the rule but discharge switch even it is off it is passing the voltage

@adityabaradia3675 Месяц назад

Very informative video 👍 Sir can you please help me, I am using Deye 5 kW hybrid inverter with DIY lithium 5 kWh battery (106ah) with JK inverter communication bms (150a) Currently when I turn on the inverter on battery only (below 20% SoC) (no grid input, no solar input) the output load is not not turning on. As soon as I unplug the communication cable, inverter reads wrong SoC and it turns on the output load. Or when I give grid input, it turns on the output load. It's working normally on SoC above 20% .. I mean booting normally and turning on output load. Thanks in advance sir 🙏

@GrantBurton Месяц назад

Maybe check on your battery settings… Settings > Battery > Shut Down menu (3rd tab at the top of the Battery Setup page)… is the Shutdown setting maybe set to 20% This could be causing the output to turn off when the battery reaches 20% SOC.

@adityabaradia3675 Месяц назад

@@GrantBurton tried that sir, same issue, i even set them to 0,0,0.. then also same issue.. I also have downgraded both the firmwares , deye's and BMS's., still no luck...

@GrantBurton Месяц назад

And what are the Time of Use settings in the System Work Mode menu?… are those set to allow the battery to be used lower than 20% SOC?

@adityabaradia3675 Месяц назад

@@GrantBurton that setting is turned off sir.

@GrantBurton Месяц назад

What if you try turning it on and setting it to 5% or 10% and see what happens?

@100balancebms25 Месяц назад

Thank you . Grant Burton.Nice video. Are you interested in our Active Balancer,Smart Active Balancer,Smart Active Balance BMS? We can provide sample for your testing . Inverter BMS Compatible with Growatt/Victron/Deye Inverter.We've actually tested and matched most of the inverter brands on the market.and they work very well

@GrantBurton Месяц назад

Hi, thanks very much. You are welcome to contact me by email to discuss further... my email address is in the about section on my home page.

@DipanjanDas23 28 дней назад

Hi Jerry .. Does 100 balance have active balancer

@GrantBurton 28 дней назад

@@DipanjanDas23 According to their website, it looks like they do have an active balancer but haven't tested any of their products.