Jakiper Battery and MPP Solar Inverter Communications, What's the Problem?

[@LithiumSolar]

Jakiper Battery... jakiperbattery.com/product/jk48v100/?ref=lithiumsolar (affiliate link) Please let me know if I missed anything or you have any ideas on how to get this working!!

[@RobinAltoft]

They are using half duplex RS485. You need to connect P on the inverter to B on the battery, then N on the inverter to A on the battery. Basically you transmit from one device to the other's receive pin. Ignore + and -. Think logical high and low. Also, you need to make sure you don't need to connect the battery's pin 3 to an inverter pin for a common signal reference. This is fairly common in PLCs and manufacturing automation.

[@carlosgaspar74]

This video may help. kzbin.info/www/bejne/o3Syhp6OppWHaJI At minute 3 schematic diagram. If the inverter and the BMS talk pylontec seems it might work, Axpert is MPPT solar sub brand (Voltronic). In some cases (more recent inverters) grd is also used... So ...

[@LarryKapp1]

I replied below to try pins 7 and 8 on battery instead - see that post. If you have the other bms out you could do continuity test to see if pins 1 and 8 are connected , and if 2 and 7 are connected . As others have said the battery bms might not spit out data on that 485 jack until it gets the modbus coms from the inverter to start talking. And if you don't have the right connection then it won't ever work. See my post below - it has video link that someone else also suggested.

[@cptjohn1143]

Did you check (with the PC Software) if the parameter of the battery were set correct? Looks like a Seplos BMS...

[@LarryKapp1]

@@cptjohn1143 Thanks John, I just got a Jakiper battery and was wondering what kind of bms is in it. I found youtube video that explains how it works and seems like the canbus port might be the thing to try . kzbin.info/www/bejne/gZyneqiDpa6rlZo

[@WillProwse]

Yeah I never got it working and never tried. That sucks they said that. I emailed them saying I am not interested in trying the communication out at all. I don't like the communication system for these batteries. I don't want any of my batteries communicating at all, and I use voltage to modify cycling behavior. Really sucks that they claimed I said that.

[@LithiumSolar]

It seems like these companies all talk even though they're competing for the same customers. I don't understand, but either way, the claim was you and Dexter got it working on the SOK battery prototype (which I'm sure they heard from Min), so if it works on that battery it must work on the Jakiper too since they both have the same BMS. Communication is definitely not needed or required, but as you've seen by my elaborate Batrium displays, I like data! Lol

[@edc1569]

Doesn't the voltage drops at different loads cause issues with using voltage to set changer/discharge responses.

[@RonPaulgirls]

@@LithiumSolar I WOULD JUST RETURN THE DAMN THING, IF THEY WON'T TAKE IT BACK JUST USE THE CELLS FOR A DIY.........THAT REALLY SUCKS AND IS VERY SCARY.......I'VE GOT A LOT OF PROJECTS WAITING FOR THESE THINGS, WHERE I MIGHT BE BUYING BUNDLES OR MIXING COMPONENTS........THIS NIGHTMARE YOU'RE GOING THROUGH IS A REAL WAKEUP CALL..........

[@caserio323]

@@LithiumSolar if you did all, any chance this battery communication is manufacture wrong connected , sorry for my ignorance, but anyone thought of this?

[@LarryKapp1]

Other info I have looked up makes it sound like these use the canbus to talk to inverter charger and not the rs485

[@rexzonner5995]

It has been years (over 30) since I worked on RS485 communications. A cable with only ONE Pair (2wire) is a one way direction communication AKA Half Duplex. A cable with TWO Pair (4wire) is two way direction AKA Full Duplex. Give the RS485 pin out of your battery to the inverter tech agent and ask them just map out the wires for a FULL DUPLEX cable. You could see both devices on your video with your usb conversion because you have them both wired to "output", aka information coming out. But on RS485 one pair is "input"(read) and the other pair is "output"(write). I hope this helps. (note: When you showed you config screen, I noticed it was set to FULL Duplex, that is what made me think about this.)

[@cpirius]

Well, sort of. You're right that two wires makes for a half duplex RS485 bus, but there's no inherent directionality. It just means that you can't send and receive at the same time, the lines are shared. With this kind of low data system, that's not generally a problem. Probably one device is just polling the other device for information to avoid transmit collisions. I don't see in the video where you mentioned it displaying full duplex. If it is set to that, but the other device is expecting or only capable of half duplex, that would be a problem.

[@Roll2Videos]

Good video. You've covered every angle possible I know it's frustrating when something doesn't work, Great work

[@silverclouds3725]

Your efforts have been nothing short of heroic!! Quite a work ethic, sir!!!

[@Me11oIngenuity]

Two things. You can snoop the RS-485 signal with a PC a 485 dongle or card, and a terminal program. Just to see if there's any activity. Secondly, the last of the RS-485 chain may require a termination resistor. I had to use them on fuel station pump equipment to get them to communicate correctly with the controller back in the day.

[@TK-123]

Wow, thank you for your efforts with this. Signature Solar was also not very helpful with their battery coms. Looks like all these companies just want to sell product.A suggestion to bite off a smaller piece, is to use a pc to communicate with the battery first. This works for the older version of Signature Solar batteries..

[@lesumsi]

I can feel your pain. I worked once with RS485 to hook up my Epever MPPT Solar Charger to a Raspberry Pi. It was a pain in the butt.

[@luc_libv_verhaegen]

Off-Grid-Garage yesterday or so had a video where Andy stipulated: if the settings for the charge curve for lifepo4 battery in the inverter are correct, and if the bms does its job of protecting the battery, and the cut-offs, float, absorption voltages are matching, does it really matter whether the bms and the inverter are communicating?

[@LithiumSolar]

Nope, does not matter whatsoever if the battery and inverter are communicating. It's just a neat feature.

[@technologyjunkie01]

@@LithiumSolar Isn't load balancing between the batteries also a part of the communications?

[@luc_libv_verhaegen]

@@LithiumSolar And it's a feature the battery people are using as a selling-point, so I am really glad that you are testing it :)

[@luc_libv_verhaegen]

@@technologyjunkie01 Load balancing between separate batteries is not guided by the inverter or BMSes. It happens automatically due to the difference in voltage and internal resistance of the separate batteries.

[@WattsMiner]

This stuff is my new addiction at the moment. Love the content

[@MiniLuv-1984]

Wow, you have really exhausted all possibilities. One thing that seems ajar to me is why the grounds are not connected through on the cable? Did you plug the analyser interface into the cable you made to see if data was being sent from either device?

[@jonathancocaud]

You should try reversing A and B on one side of your cable. There are a lot of instances on the web where the RS-485 B is the positive line and the RS-485 A is the negative line. It should be worth to try B->P and A->N.

[@curious-homebody]

this ^

[@jacquesvisagie6523]

Love your interesting problems. In our country the Mpp inverter is either the Kodak Maxi Org 3.6.-- 7.2kw or Rct inverters. Installed a lot of Kodak with mostly the Pylontech 2.4 kwh and the 3.5 kwh lithium batteries. A lot of other make lithium batteries was also used. Since day one on the inverter setting Pylontech get the same faulty reading 61. The only setting i use is the user setting. Program the inverter according to the battery manual battery volts. If more than one Pylontech battery is used the commutation wire between batteries must be used. Master battery dip switch number 1 on rest off. Next battery all dip switches off. When master battery start button pushed it starts all other batteries in parallel. Done these type off ajustments on different make of lithuim batteries. One type of lithium battery the cut off volts on battery to be set at 48v other wise it needs to be reset in a very complicated way.

[@EpicHardware]

how nice, customers doing r&d for the products they bought. What else? should we fix it for free jakiper?

[@stephanerivette9489]

Often manufacturers will use the same protocol with their spin on it, and it won't jive well with others. Maybe this is what is happening out here.

[@joshrg22]

@LithiumSolar I wonder if the default rs485 address is the same on the battery and inverter. Default is 001. In the settings menu you have to address the devices. 01, 02, etc. If they have the same address there's a conflict

[@LithiumSolar]

Where is this option? I don't see anything relevant on the inverter.

[@cpirius]

I think that your RS485 wire has the polarity inverted. The MPP Solar Inverter lists the pair as N and P, and the battery lists it as A and B. As you describe how you connected the pins on each side, you connected A to P and B to N, which is a logical assumption. However in RS485 A is typically listed as A- and should be connected to the N, and B+ which should be connected to the P. I don't know if that will make it work, but it might be part of the problem. Good luck :)

[@haganoriyuki6938]

Did you make sure the dip switch itself is not upside down like how the signature batteries are? Try reversing the order of the dip switch with down - down - down - up instead

[@LithiumSolar]

I did check after seeing another that was upside down (think it was Gyll?). The DIP switch actually removable in a socket that looks like the kind of socket you plug an IC into. I made sure it was oriented correctly and also tried all 16 possible combinations (took a long time...). Thanks though.

[@kevinroberts781]

Did you try A,B,A,B, UP, DOWN, then START SELECT at the same time?

[@uhjyuff2095]

lol

[@LithiumSolar]

Well, that got me a level-up but still no comms...!

[@joshrg22]

What pin numbers are you using for the rj45?

[@AngelPerez-ov6mt]

This is how I solved this issue I have the same inverter and the same BMS on my battery, Setting on the inverter for battery type (5#) do: USE (user), for the communication use the CAN provided in the manual and is as follow: inverter side 6, 7, 8 goes to 5, 4, 7 on the battery side dip switches set to OFF all of them, restart your battery I hope this helps. Happy offgriding. 🤘

[@briancoverstone4042]

What if you paste some of the codes manually that the inverter sends to the battery using the computer terminal? Perhaps the RS485A port doesn't send anything until something it sent to it first

[@jeffbowers950]

Try connecting the RS485 cable directly to the chassis of an Oldsmobile 448 and dragging it down the street to the nearest landfill (after harvesting the cells of course) Or use a hammer as previously suggested. Sorry, feel your pain. Never a tougher task than when a simple project simply won't work due to poor design and manufacture. The Industry really needs a standard universal practice for communications but that's sadly a long ways off. Love the ability to monitor data in real time but I've opted for the EG4 waterproof 48v battery with a good BMS and Bluetooth. They work great and I monitor my inverter & system online. Just step into my battery room to check batteries via Bluetooth. Simply reliable and redundant system - so long as the inverter & comms function (no problems in 5 years to date) and the charge controllers continue to perform fine. So far the only frustration we've had is fairly common internet provider outages which keep us guessing when away from home. Keep up the good work.

[@happypaws8489]

What is that wire with the gray box on it (I am assuming a fuse?) running from the battery to inverter?

[@bobcole3852]

Ask Will for his opinion. Nothing wrong with a third opinion. I am considering the same setup so will follow along. Thanks for such a thorough investigation, hope you git 'er dun, soon

[@LithiumSolar]

I was thinking of reaching out to Will, but it looks like his Jakiper battery is the old version from before the inverter comms were added so can't even ask him to test with his.

[@bobcole3852]

@@LithiumSolar AX him anyway! He may have received a newer one like yours, or just like the challenge!

[@LarryKapp1]

Look here Bob Cole kzbin.info/www/bejne/gGStoXukaauYp6M

[@jimmyross1672]

well your the smartest person i know on youtube so im not sure anyones comments will help but its worth a shot i guess well good luck and i hope you figure it out because i can tell you dont like not knowing why something sint working or what ever lol im the same way if i cant figure out why someyhing happended or didnt happen i loose my mind if i cant figure it out lol well good luck brother keep on keepin on

[@jaroslavcecho3348]

The UTP communication cable between the Pylontech B batteries and the switch uses connections 1-3, 3-1, 2-5, 5-2, the Pylontech C has 3-8 / 5-7 and is connected to the RS485 port. The batteries must be set to 9600 bps with the first DIP switch.

[@TonyPham-Creations]

Are the dip switches usually inverted? (down = on, up = off)

[@SkyNoris]

I used to work with 485 often. The ground is mainly just a shield to prevent interference. Not needed per say initially. Usually when I'd get a dead signal like your getting I'd simply changed the polarity on one connector. Sometimes you can get RX and TX mixed up. I'm sure you've already tried that? Most likely it's a firmware issue holding things up. IMHO

[@bloodcarver913]

Jakiper has a video describing how to do this. You need to log into the battery with rs232 and change the protocol to suit your inverter. Telnet and a cable should do it. Check the video on their channel.

[@LithiumSolar]

Yeah, I'm the one whom solved this for them. They didn't know at the time I made this video lol.

[@nassersalem615]

@@LithiumSolar Can you send the video link please

[@LithiumSolar]

@@nassersalem615 Search the videos on my channel...

[@bonjoursolar]

i think the BMS protocol was old version, and the Mppt modified something in the new protocol, so still showed the error 61 bms communication lost

[@rmdjapri]

have you tried to use CAN instead? I don't think they can communicate using RS485 with the inverter.

[@korishan]

I didn't see this mentioned in the comments... At 0:50 you show the manual for the RS485 pinouts. For RS485_A it says that pins 2,7 are for data, but it also shows pins 3,6 are GND. Have you tried using 4 wires, with 3 & 6 connected to GND on the Inverter? I recall you mentioning something about GND loop. But "this" GND would be different than "Electrical" GND. Signal GND can be completely isolated. It is usually used as the Common 0V rail reference. Some devices "require" the GND to be present because "that's" how it detects if something is connected to that port. It does a resistance test between GND and DATA pin, which has voltage on it, and that triggers the system to know that something is connected. The BMS could be designed to not output data unless it detects something connected. Considering that this is a multi-Protocol unit, this would make sense. The BMS would only output signal instead of wasting cycles processing a non-selected protocol.

[@korishan]

Adding 2nd comment as it's getting long... It's also possible that you have Pins 1 and 2 reversed. They are polarized. I found this for common RS485 coms: --- Function Terminal Connected loads/Description Serial interface RS485 (Bus) X100-1 RS485P Plus line Send and receive- X100-2 RS485N Minus line line X100-3 RS485P Plus line (difference input/output) X100-4 RS485N Minus line X100-5 Signal frame --- Granted, pins 3,4,5 are connected differently in your case, but it does show that one of the pins are Positive, and the other is Negative. So you may have your pins swapped. I think I saw this suggestion in another comment as well Basically this would be akin to connecting the SENDING(inverter) pin to the SENDING(bms) pin, and RECEIVING(inverter) to RECEIVING(bms) pins. You may need to switch these around so that it's SENDING(inverter) -> RECEIVING(bms) and RECEIVING(inverter) -> SENDING(bms).

[@LarryKapp1]

@@korishan Jakiper made video on how to set this up kzbin.info/www/bejne/gGStoXukaauYp6M

[@porousorificePilot]

I may have missed it but did you ever try grounding the two?

[@LithiumSolar]

It wasn't discussed in the video, but yes, I did try with the ground pin connected as well.

[@randylenart9674]

Thank you for reviewing this product so we dont have to good review 👍

[@jeremyohara6513]

i created a massive program that worked with Midnight, victron, and MPPSolar inverters but unless its changed the BaudRate for communicating with the MPPSolar Inverters used to be 2400 and using CRC16 to read the data. it was last tested with a MPPSolar 5048 with no problems. but saying that communicating with the batteries could be different thing

[@jcjorge2010]

Have you tried connecting the battery at a low state of charge , maybe the bms needs to be fully active to work , or try to activate to low voltage disconnect function or the over current discharge function to reset the bms

[@healeydave]

I know RS485 is a standard but I have been told that it is not possible to program the BMS to work with all Inverters out-of-the-box. I was informed that the batteries BMS needs to be programmed for the relevant Inverter they are going to be connected to. Jakiper should have asked you which Inverter you were going to use with the battery before they shipped it and programmed the BMS accordingly.

[@primozkert]

What are the advantages of having an inverter and battery connected to communication?

[@MrPeterheritage]

I feel your frustration I have spent many weeks, I Have a similar problem in the UK I brought a Voltacon E-Box-48100R 5.12Kw battery and connected it to my Sofar Solar inverter via CAN cable and all worked great, so I ordered another one but unfortunately, a Pytes-E-Box-48100R turned up but was told they are exactly the same! I wired them as instructed, but after a few minutes get a fault on the inverter then it goes into a 60sec test loop ending with a red fault light, so I try the new Pytes on it’s own I get the same fault loop if I then just connect the original Voltacon it works perfectly again, I have had video calls with Pytes in China they can’t work it out, they say it must be an inverter problem! but If that is true why does it work so well with the first battery, I would change the inverter if I knew the battery was not faulty, has anyone had similar problems and sorted them?

[@silverbeowoulf]

I couldn't tell from the video, but is the BMS on? I couldn't tell if the lights on the power button were on during the testing

[@LithiumSolar]

Yes, the BMS was most definitely on. When the BMS is off, it also shuts off the SOC lights.

[@509Moto]

Also as per the Pylontech manual it says pin 7 and 8 are recommended for RS485 idk if that pertains to you or not

[@dahuar2006]

Have you ever fix it?

[@tanproduction4936]

hi i have bms and only rs232 . i want to convert to rs485 to connect to inveter luxpower sna . will it work like your rs485a

[@LithiumSolar]

Please see this follow-up video with instructions on how to change the protocol kzbin.info/www/bejne/o4GZk4JqicdjaNk

[@tanproduction4936]

@@LithiumSolar no, my battery has no rs485 or CAN connection. it only has rs232

[@tanproduction4936]

@@LithiumSolar i want to convert rs232 to rs485 using external device. without having to change bms with communication

[@LithiumSolar]

@@tanproduction4936 Oh sorry, this battery cannot communicate to inverters on the RS232 port.

[@jamesshowalter6362]

At EG4 we always test our BMS integrations before promising them

[@silverleapers]

kzbin.info/www/bejne/aYuTk3-oiJusqKs

[@ralph9987]

I am not familiar with this system, but wondering if data TX needs to connect with data Rx? Or another combination. If the data Is duplex then you will need a ground (common)?

[@TruthTortoise81]

you obviously don't know what you're talking about

[@ralph9987]

@@TruthTortoise81 either do you or you would have posted the solution. Loser.🤮

[@omadasmtp543]

I have the same setup. Please continue your investigation.

[@paulbarrette2557]

sir yes sir

[@MrKillerbigge]

Q4: How BMS communicate? A4: Basic version received before 23th, February, 2022, BMS can communicate with PC though RS232/485. Upgraded version which received after 24th, February, 2022, BMS can communicate with inverter though CAN/RS485A port, like Growatt, Sol-Ark…

[@LithiumSolar]

Mine is the upgraded version that has the BMS comms ports.

[@kevinroberts781]

Have you tested that inverter with a different battery?

[@LithiumSolar]

I don't have any other batteries with the same communication options unfortunately.

[@509Moto]

What was the verdict???

[@LithiumSolar]

I gave up... Jakiper told me they purchased an inverter to do their own testing/configuration with.

[@509Moto]

@@LithiumSolar I'm tellin ya man try what I wrote below I bet it will fix your problem

[@errcl65]

What breaker are you using for a disconnection and safety between the Jakipar and the LV?

[@LithiumSolar]

Chint NXB-125

[@errcl65]

@@LithiumSolar for a 30Kwh 6xJakipar, do you prefer a pair of hcr fuses or a 2p breaker?

[@LithiumSolar]

@@errcl65 With that many batteries, definitely a pair of HRC fuses.

[@EdgarIsaacDLRO]

I have this problem now between MPP LVX6048 and JK BMS INVERTER (NEW VERSION); and MPP SUPPORT SUCK A LOT. It is frustrating

[@LithiumSolar]

Sorry to hear you're having trouble. Unfortunately, I have no advice to give as I've pretty much given up on MPP Solar at this point.

[@joshg1244]

Sure looks like you have the right pin out and since you get the data from MPP I think your right about the BMS software being wrong/buggy

[@stephanerivette9489]

IF we look at your laptop's screen, we can see that the prefix on the two sets of data is not the same. I'm saying that maybe the hardware is working, But the protocol is not the same. What the inverter is sanding is not the same as what the battery expects is vice-versa. What you need is the protocol message that the battery sends and expects. And also the same thing from the inverter. Then you can see if it is possible to make those two jives. Hopes that helps

[@edc1569]

RS485 needs a common ground, wonder if you need to tie the chassis fo the battery to the ground of the inverter.

[@evjedi4061]

It might need a resistor on the communication Cable. That’s a stretch but that’s about all I can think of. 🤷‍♂️

[@jcjorge2010]

Try connecting the communication cables first, and then turn on the battery and then connnect the main power battery cables to the inverter

[@michaelwestman3678]

I'm hoping you can get this figured out.

[@DCGULL01]

Thank you for trying! Very frustrating- waaay past my pay grade!

[@supermo26]

I don't see a video about your solar panels. What is your solar array?

[@LithiumSolar]

There are no solar panels connected to this setup.

[@yancymuu4977]

Many devices uses what's called the MODBUS protocol on top of rs485. If so, the dip switches probably set the hardware address of your charge controller. In MODBUS, there is one master that can talk to many slaves with different hardware addresses. My Chinese epever charge controller uses MODBUS over rs485. I have written an arduino program to send commands and get status from the charge controller. I was able to find a mapping of the registers on line, but you could just sequence between the possible commands and see what comes back. An oscilloscope would be very useful to monitor the data lines to check to see if things are connected properly. One common problem is getting the A and B lines reversed. Hope that's useful.

[@LarryKapp1]

jakiper made a video showing how to set it up kzbin.info/www/bejne/gGStoXukaauYp6M

[@yelims20]

you need the GND wire between the two data ports

[@TruthTortoise81]

nah

[@donaldhiles_k9sgz428]

I agree. The ground could be a special ground for communication

[@LithiumSolar]

I didn't mention in the video, but I did try a pile of times with a cable that has the ground wire connected. I just made another cable after reading this to double-check and still no luck... Thanks though!

[@dani-ohciao]

Ho il tuo stesso problema, inverter voltronic che non comunica con le batterie basen, contattato venditore di batterie ma non sanno come risolvere.

[@wesak777]

Hi, look like it is the communication protocol, BAUDS-stopbit- etc. if those two do not speak the same language they dont communicate. For what i understand, check the bauds etc it is using on your computer, and if you have to conf the same on the units. have a nice one everybody

[@LarryKapp1]

Looks like it needed a bit more setup than simply plugging it in even if the connections were correct - jakiper made a video kzbin.info/www/bejne/gGStoXukaauYp6M

[@hubertnnn]

I am almost certain that you need grounds to be connected to get reference voltage.

[@LithiumSolar]

I tried both with and without the ground pin connected.

[@daemoncan2364]

I was always under the impression that you need two pairs at a minimum for RS-485 (differential)

[@LithiumSolar]

There are multiple versions. The most basic is half-duplex with 1 pair (which is what we have here). There is also full-duplex that uses 2 pairs.

[@dempisstoff4841]

Will the battery work OK without communication? Is it an essential feature or ust " nice to have"? But there is the issue of truth in sdvertising/ false claims

[@LithiumSolar]

Absolutely, it works great without the communications. It's just a feature that's nice to have and wanted to demonstrate since both devices support it (supposedly).

[@dempisstoff4841]

@@LithiumSolar thanks. I believe in the KISS principle !

[@todamnbad]

Totally off topic but does that inverter have a N-G bond under battery or grid passthrough

[@jamiebrock7157]

yes ,but there is a screw you remove to disable grounding relay

[@todamnbad]

@@jamiebrock7157 is there a benefit or need to remove the screw? I was told its needed so that it is UL compliance but also got told that i can't have the N-G bond in the inverter because it needs to be done at the panel

[@jamiebrock7157]

Where remove the screw or not basically depends on how you wire it. You don't want a ground Loop that's the safety concern. You don't want to ground and neutral Bond to be in two places so if you plan on bonding neutral and ground at the panel then you need to remove the screw

[@todamnbad]

@@jamiebrock7157 when I asked about the screw I was told that the firmware update fixed the issue with the N-G bond and to not worry about it and that for it to be UL it requires it to have the screw in place but if I choose to I cam remove the screw to get rid of any doubt in my mind, im so confused

[@MattSimmonsSysAdmin]

Have you tried shunting these through the GPIO on a Raspberry Pi or Arduino to monitor state and try to watch the traffic? [edit] No, but you used a USB. I wonder if you do a tap off of a cable and watch the two-way communication if you would get anything different.

[@DiedLiu]

Thank you for test it.

[@mr.goldenrod291]

Maybe using Modbus protocol? Communication enabled on battery? Ground wire C?

[@hydroalternation]

sounds like there is "init" and "ack" handshake gone bad i have found some versions of terminal not functioning properly after loading teraterm to a win 7 machine comm was back MTC

[@509Moto]

Ya man.. I've watched your video like 5 times to see if I maybe missed something.. try hooking your Amazon adapter with pins 7 and 8 wired instead of 1 and 2.. I bet you will see data like your supposed to.. also let me know when it's working 😉

[@509Moto]

So try this... on the battery side comm cable connection move to pins 7 and 8, and put the dip switches with 1st one down and the rest up and I bet that will fix your problem 🤔

[@christomalan6773]

I have the same problem with my narada pack. Cant get the batteries to communicate with each other. Thx for this video

[@owenparker6651]

The complete lack of packets from the battery is telling if you ask me. Something isn't right. It sounds like you have open communications with the battery people. Should there be packets being output on that port? Is there a setting to enable/disable data on the port? I'd attack that specific issue if it was me spinning my wheels... Good luck and keep us posted please.

[@edc1569]

On RS485 often you have some device be the Master, if you just have devices communicating randomly then you need to do all sorts of collision detection and mitigation.

[@owenparker6651]

@@edc1569 Agreed. However, if there is zero traffic in or out, it would seem as though the port was not functioning at all, to me... I'm talking out of my azz, knowing so little about the actualities of the case, so don't mind me! 😊

[@runneryg]

I have the same Problem with my set up can any one help me! i have 24 VOLT LIFEPO4 BATTERY AND HYBRID INVERTER AND ITS NOT CHARGING FROM SOLAR THERE NO SWITCHES ON THE BATTERY CANT GET IT TO CHARGE GRID CHARGES THE BATTERY, CAN ANYONE HELP ME.

[@herbertvonsauerkrautunterh2513]

I'm just going through this now... Omg. I can't find my bag of RJ45 plugs.... Woops, my inverter pip5648mt doesn't say anything about battery connection in the manual. Only that it has a USB and rs232 port.. oh well

[@whoguy4231]

Shouldn't the inverter be silent and receiving and the battery be sending. That cable showed the inverter sending. Check the data is going from the battery into the inverter. If it's single directional, the inverter receive buffer should fill when data is sent from the battery.

[@offgridmgtowhomestead2520]

I wish companies would use modbus standard. Everything that I design and implement has modbus and bacnet inherently

[@509Moto]

Also maybe try setting 5 on "use" instead of "pyl"

[@hory9568]

Update the Firmware's if possible

[@vt1405]

I hope You will find everything you need . Let me know

[@1981dasimpson]

i think i would try a to b and be to a just to try like rx and tx one devices also see if they is an option to change bud rate

[@props-model-shop]

Defective Battery

[@LarryKapp1]

When you hold up the Jakiper manual you show it says pin 1 and 8 for 485_B and it says pin 2 and 7 for 485_A but when you mention your wiring you say you are hooking it up to pins 1 and 2 on battery . Did you try making the cable using pins 7 and 8 on Jakiper instead ? Someone mentioned another video ( see link) where they show these connections on 7 and 8 on different equipment ( but maybe same bms?) Someone else mentioned you might need to hook up the ground wire too . kzbin.info/www/bejne/o3Syhp6OppWHaJI

[@simonwesson-ie1lw]

Hi I have a taico lifep04 4 bms battery and also having the same issues and no help from anyone

[@offgridwanabe]

Wow you have gone the full limit on the troubleshooting and I can hear the stress, just a wild guess the chip needs a firmware upgrade as the data pacs are empty.

[@RolandW_DIYEnergyandMore]

People have generated electricity by connecting dumb lead acid batteries to inverters for decades. Then they started to replace the LA batteries with dumb Lithium batteries and all just worked fine. Communication was introduced to commercial products, so that users could NOT easily take any equipment and mix it up as they wanted. This is just the "Apple" concept put onto every newly built device. For what? I would never buy anything what need communication to work! If the device is only monitoring, then OK. Don't let a company tell you what "SMART" is. Be the smart one and go for basic, first principles. Something what will never break on you and where you can understand what is going on at any time.

[@edc1569]

Not everything in life is some grand conspiracy, having your inverter/charger tail off change current at high SOC is pretty handy. Also having an inverter shutdown gracefully and not just the BMS opening the FETS on a 100A load makes me feel happier something isn't going to go pop.

[@RolandW_DIYEnergyandMore]

@@edc1569 All those levels and limits you are talking about, can be set in the inverters UI anyways. Why would a BMS need to dictate this? Now you will say because of cell level voltages. Are you seriously going to hard limits on daily basis? The BMS has anyways final authority as you have correctly stated. What I dislike is that there is no fallback in this case. You get an Error on the inverter and it will shut down. Just because of communication issues while the inverter could easily continue its job by basing decisions on voltage. Generating electricity is a discipline of electrical engineering. Unfortunately, IT is starting to take over too much of it in my opinion. But yeah. Thats fashion of our modern times, and consumers are asking for it...

[@benjones8977]

Disappointed in the company not being more forthright! If I were you I wouldn’t waste any more of your time, it’s obviously the company is the problem, which unfortunately is now your problem. I hope you find a solution!🖖

[@Songomx]

Hi @LithiumSolar !!! Check out this video from Jakiper Battery kzbin.info/www/bejne/gGStoXukaauYp6M It might be the answer you are looking for communicating your Jakiper battery with your MPP Solar inverter. Everything is done with a Growatt 5000 ES, but it's probably the same procedure... Need a straight through Ethernet cable and to use a laptop+software to connect to the BMS and have him accept the inverter of choice... Hope it helps...!!! Stay safe...!!!

[@greatnowwhat]

If both sides are sending data, it will not say that both sides will receive data. In other words, if one of the 2 receivers fails (in battery or inverter), it will not work.

[@AndyMcBlane]

"It works" ... "actually we haven't tested it" Wow.

[@AndyMcBlane]

Sounds like devs :P

[@uhjyuff2095]

lol

[@RaukGorth]

Sounds like the devices are using different protocol

[@fencer4353]

Hi! This is James with EG4, we’ve emailed you, let’s talk about some videos of our gear and commentary

[@Pappy-1]

i am guessing a dip switch problem

[@Shep5847]

Try A to B and B to A.

[@technologyjunkie01]

I have two Jakipers, and have had multiple issues with one of them. It took two months to get it repaired, which I had to do myself. Jakiper customer service is not the best. I would stay away from Jakiper.

[@igorkvachun3572]

Yes👍🔋⚡ 💡 🇺🇦✌☀

[@johnstark4723]

A single battery should be 0000 not 1000. 1000 indicates the master so the system expects to see 2 batteries not 1

[@LithiumSolar]

No. The 0000 indiciates single battery with no communication. Setting the first DIP To 1 (or 1000) turns on the communication. Yes, it also defines that battery as the master and but it's NOT making it expect 2+. If you don't set it to 1, you won't see data on the RS232 port.

[@edwardbyrd7667]

Sorry for your pain, but I’ve been saying how dishonorable this company is Jakiper simply lies

[@LarryKapp1]

They made a video on how to set this up kzbin.info/www/bejne/gGStoXukaauYp6M

[@robijayj]

make a video when you get it to work.

[@LarryKapp1]

Jakiper made a video kzbin.info/www/bejne/gGStoXukaauYp6M