Fault (20) Growatt & EG4 24v Battery BMS Test - Doesn't work, crossover cable

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  • เผยแพร่เมื่อ 19 ธ.ค. 2021
  • In this video I specifically address a possible fix to fault code (20) that the SPF 3000tl Growatt says is a BMS communication error. The Manual instructs us on how to setup the configuration between the Growatt Inverters using Pinout config. 1/2 on the RJ45 cable and Pinout config. 7/8 on the EG4-LL 24v Lithium Batteries, I make this crossover cable, show you the Users Manuals and address this specific point to see if it'll work connecting a cable directly from the inverter to battery.. Well it doesn't get rid of the Fault 20 error, but I had fun trying! Update: Many viewers have also wrote in mentioning to use a generic pass through communication hub for rs485 suppor as opposed to a network hub that might switch signals incorrectly.
    First Video: BMS Communication setup with Growatt Inverter and EG4-LL 24v Lithium Setup and Problem - • BMS Communication with...
    Comments are welcome, one reason I create these videos is for us all to learn, be safe and create a good experience for all while making DIY projects.
    An overview of my system - 2 Growatt 3000TL LVM-ES 48 volt inverters, configured to grid power, running in parallel Split Phase, connected to 24v EG4-LL Lithium batteries, 25.6V, 200AH - 2 x 2 in series to make 48v 400AH total. Overall a great system, 7KW PV system feeding into this battery bank, not a ton of power but more than efficient when connected to the grid and being aware of your electrical needs and consumption. Happy DIY-ing friends! Leave any comments below, if I can I'll be more than happy to help.
    Additional videos on Growatt SPF 3000TL LVM-ES 120/240 Volt Inverters: • Growatt SPF 3000TL LVM...
    Snow effects on Solar Panel systems:
    • Snow effects on Solar ...
    Video on EG4-LL LifePower4 batteries here:
    • EG4-LL LifePower4 Lith...
    Growatt SPF 3000TL LVM-ES FAULT 15/16
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    How to wire Solar Panels to Break Box - Beginning to End:
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    Part 2 - How to wire Solar Panels to Break Box - Beginning to End:
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ความคิดเห็น • 52

  • @marknktown2642
    @marknktown2642 2 ปีที่แล้ว +1

    This has got to be driving you crazy. Hope you or someone else can help you figure this out that would make a nice xmas present to yourself. Hang in there you will get it!

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว +1

      I actually like chasing down electrical or software issues like this. The reality is these Growatts work perfectly fine under the "User" defined (option 5) battery setting in the menu. I don't even think I'd use the "LI" setting if I could get it to work. We'll see where it goes.

  • @dansanford7493
    @dansanford7493 2 ปีที่แล้ว +1

    Thanks for your videos. I am having similar issues. I have 4 EG4s (1 month old), 4 G4LLs (9 months old), and 4 Growatt 3000 LVMs 2 in each phase, all 48v. I get fault 20 when trying to use Li setting. So far, I haven’t been able to get the BMS software to work with the new batteries, although it works with the older ones. I appreciated Jimmy G’s comments and I will be continuing to lurk on yours and other’s sites. I wish I could help, but as yet I’m struggling even more than you.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Welcome to the chat Dan, sounds like a really nice system you have in place. I'm surprised you're getting the error code 20 given you're entire system is 48v, maybe it's the difference in hardware/software from Gyll to EG4 or more likely the 3000tl is the issue like my system? Thankfully thee BMS of the batteries works well enough for the moment for me, but I'm still planning to install a backup external BMS between my inverters and batteries prior to any expansions. I've tried every configuration possible, first those provided from in the manuals and techs and then cross figuring every possibility I can bring forward to mind without success to test the system.

  • @harrycobbler9806
    @harrycobbler9806 2 ปีที่แล้ว +3

    I just had this same error 4 / error 20 problem on rs485. same inverter model as yours. Same battery as yours. To get it working I did the following. I used the can bus ports on the inverter and battery instead of Rs485 ports. when setting option 5 to “li” and being redirected to the option 36 screen, choose protocol L51. This is a CAN bus protocol. Now it should work. Once you get it working on one inverter then try adding the other inverter into the picture. I agree with the other commenter who said that looked like an Ethernet switch you were using. That will not work. That is only for home networking, not serial communications.

  • @haganoriyuki6938
    @haganoriyuki6938 2 ปีที่แล้ว +1

    I got my 4-20 comm error to go away finally. I’m running the 24v lifepower4 battery and growatt 3k inverter 24v. I turned down all the dip switches and then made the setting 5 to Li with protocol 36 and L01. Be sure you connect to the BMS port in the inverter.

  • @ghostriderjku7209
    @ghostriderjku7209 2 ปีที่แล้ว +3

    I purchased 3 of the eg4 batteries from sig solar. They told me that their batteries would communicate with my 3000lvm 48 volt inverters. In the beginning I was getting the 04/20 fault codes when attempting to use the LI option on setting 5.
    I have now been able to figure out some communication with the batteries and inverters and no fault codes. First make sure your inverters have the latest firmware on them. Then set all four dip switches in the down position (master battery) and connect the rs485 cable into the bms port on the inverter. This works for me. Now my issue is the batteries will stop charging at 91%. Sig solar has been no help to this point in figuring out any of my issues so I don't expect them to offer any solution to get the batteries to charge to 100%.
    Therefore, I continue to use the use2 setting on my inverters so I can charge them completely.

  • @andyknowles666
    @andyknowles666 ปีที่แล้ว

    I also had this problem, battery arrived today (LifePo4 120ah 48v - with Growatt 5000es) - had same issue 4, and 20 on the errors when switching to Li mode
    I contacted the battery place and they said switch up Jumpers 5 and 6 and then set the type to Li and the protocol (36) to 51...
    I had to make sure the ethernet cable was in the BMS port as opposed to the RS485.
    I then shut it all down and brought it back on, and it's working fine

  • @markalbert7363
    @markalbert7363 ปีที่แล้ว

    Ok, I got my Growatt 6000T communicating with my EG4's. I started with the Switched over cat5 and got the error. Hooked up a standard Ethernet cable and got communication. Put new ends on the original cable, with same pinout, and all is good. Make sure you are using the BMS port, and not the RS485 port, on the inverter. Also when using dual inverters, I would use a rs485 link card eg-Ziplink, not a Ethernet switch. It is hard with the documentation given, but I think the Batteries use pins 7 and 8 for battery to battery communication, and pins 1&2 for master battery to inverter communication.

  • @apacheunderscoreone
    @apacheunderscoreone 2 ปีที่แล้ว +1

    I had mine sorted out . If the below comments don’t help you guys , msg me , but I need to know which manufacturer and model of the BMS inside the battery. But use canbus port on battery and bms port on inverter. Li , L01,51 ) this is for canbus. The cable should be pin out as below 1-5, 2-4 and 3-6. Try these three wires only. Do not leave out 3-6 (ground). Cable ends are specific to inverter and battery. Cannot be used in reverse direction

  • @dansanford7493
    @dansanford7493 2 ปีที่แล้ว

    I was able to get my Growatts to accept the Li setting. After having powered up my units, I turned off my loads and switched off the Growatts. The screens are still illuminated because I hadn’t shut off the batteries. I went to setting 5 and changed battery setting to Li and got protocol screen where I changed it to Lo1. I pressed enter and escape and the unit took the changes without giving me the fault. Then I powered up the Growatts and had the Li icon beside the battery. I also scrolled through the settings to confirm that 12 and the others are being displayed in percentages which they are. Interestingly, the Growatt acting as host changed in this process. The only battery in my bank that Growatts are communicating with is the first of 8, which is set to 0 (all down). This battery is one of the new Lifepower4s which I still haven’t gotten to be read by the bms software. I have the same version of bms software as you. I’ll be changing cables and trying to determine if the newer bmses work with the older ones or with our software. I hope this helps.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Dan thanks for taking the time to comment, what are the voltage of your batteries?

    • @dansanford7493
      @dansanford7493 2 ปีที่แล้ว

      @@ahhlifesgood1956 All eight are 48v 100AH purchased from Signature Solar.

  • @ashu9493
    @ashu9493 2 ปีที่แล้ว

    Did you also try it hooked up to just the other Growatt? Maybe it is a defective component on the left Growatt. I agree simplifying for troubleshooting is a good way to go.
    You could also try just using a pair of batteries for testing incase there is something wrong with one of the batteries and swapping to a different pair if you get the same error.
    Have you contacted the vendor for their advise?
    Does the RS485 A or B translate to the D+ or D-? I'm used to seeing transmit or receive on a serial communications crossover cable. It's been a while since I made a communication cable.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - That's a great question ASHU on the "A or B, D+ or D-" and if they actually represent the pinout configuration one thinks and sees in the manual? I made an additional cross over cable that went into the opposite pins 8 to 7 just to be sure this wasn't the issue, without luck. I will try the other growatt as an idea, maybe even get out the backup inverter and battery to do a test. The process has been enjoyable so we'll see where it goes.

  • @typxxilps
    @typxxilps 2 ปีที่แล้ว +1

    maybe changing the bms for a jk or seplos one makes more sense to get it fixed cause both support canbus which the growatt loves.

  • @mikecoxfamily
    @mikecoxfamily 2 ปีที่แล้ว +1

    From Growatt. If Pylon battery want to build communication with inverter(SPF3000/5000TL HVM/WPV/ES):
    Inverter side setting:program 05-36-L02/L04(SPF3000/5000TL HVM),
    program 05-36-L52(SPF5000TL HVM-WPV/SPF5000ES),
    Inverter port:BMS port(SPF3000/5000TL HVM),
    CAN port(SPF5000TL HVM-WPV/SPF5000ES),
    Battery side DIP switch:1000----ON OFF OFF OFF
    Battery port:RS485 port(SPF3000/5000TL HVM),
    CAN port(SPF5000TL )

  • @mikecoxfamily
    @mikecoxfamily 2 ปีที่แล้ว +2

    For some reason, my text has a strikout line through it in the previous reply (for me anyway). So here's the short version. 5000 ES setting menu item 05, Li and 36 L52, Bat dip 1000 and use Lan cables between BMS (inverter) and CAN (Batt). My system is working perfectly now. I have 3x 5000es single phase parelled and 12 Pylontech US2000 in two banks. My next problem is getting the WIFI to work. Looks like it will be painfull as well !! I'll post the complete Growatt text as well as it has settings for some other configs tht+at might be of interest. Happy holidays.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว +1

      - Thank you Mike for the excellent detail on your setup and configuration, I plan to setup a backup inverter and battery I have using your same settings and a cable configuration another viewer sent in to see if I can get a positive result on the 24v batteries, Really appreciate the information posted.

    • @MrThisIsMeToo
      @MrThisIsMeToo 2 ปีที่แล้ว +2

      Good luck on getting the Wifi to work. After overcoming many of the struggles that we all have (very poor documentation, specs that are not held to or documented, incomprehensible Chinese English). I gave up on Growatt. The silly Wifi dongle was the killer. I remember one error message in the Wifii App "Ensure to suck the antenna to the suction device" or something along those lines. As an old-time network engineer, I could not get the Wifi work. You can even find a very embarrassing video here on TH-cam of the owner of Signature Solar (a large peddler of the Growatts) cannot even get the Wifi dongle to work.
      That along with the idle consumption of 48 watts, means I need two 300-watt panels just to keep the thing at idle. Yes, we all know, the claimed power saving mode does not work. . Charge voltage setting in the Growatt is ignored and it just puts out some voltage that I have no clue where it is getting the setting from. I also have the EG4 waterproof batteries. They are no prize-just relabeled Chinese garbage. The BMS as well as the corresponding APP (which is not even with Google or Apple, you must download a file and force it to install), are both complete jokes.
      While the Growatt is cheap it is nowhere worth the hassle and headaches. I should have returned the Growatt when I went to install it and could not connect up the AC cables as they had a ribbon able stretched right across the inputs. You can even see Will have the same issue in his video review. For twice the price I bought a Victron. Completely different beast. Less headaches and considering 12 watts at idle, I save money without needing more solar. Documentation that is near perfect and everything works as advertised.
      The EG4 batteries I will have to keep as replacing them has no real benefit as compared to the price increase. Luckily, I have a Victron Bluetooth shunt in front of the battery bank and that helps. Surprisingly completely different measurements (amps, voltage, etc) on the Victron shunt then the EG4 app. Fluke voltmeter confirms the Victron shunt is correct.
      Shame on me though. I researched hard, and saw a number of people (videos, forums, etc) trying to get the Growatt to work. I even remember reading the manual where it stated that I could only use a 20kw Diesel generator with the Growatt 3000. Ya ok, I am buying a bottom priced invertor, but need a overkill high-end $15k generator. I know this is false, but the fact that it is in the manual should have been a tell-tell sign.
      Long rant, but like many here I struggled to get the Growatt to work. While cheap and it might have its place, not for me. Since dealing with the Growatt, I have made a new rule in life. No more, direct from China garbage.

    • @JosephStory
      @JosephStory 2 ปีที่แล้ว +1

      @@MrThisIsMeToo I remember about a 30 minute hassle getting the Phone app and the WiFi dongle to communicate. Then I realized it was easier to get my laptop to connect to the dongle's WiFi access point and then point my browser at the IP address. Configuration from that direction was easier. I went through this twice. The first time I changed the cloud url to the proper U.S. cloud server IP. The second time I configured it to communicate to a proxy service on the local network to allow for capturing the data on a local database and still be able to read the stats on the Growatt cloud service. Another benefit doing it this way allows for changing the update frequency of the dongle from buffered 5 minute intervals to 1 minute.
      I looked at the Victron equipment. Very nice stuff. I started budgeting for it until I started to feel like for twice the cost of the AIO Growatt, I would be nickle and dimed further to buy dongles for the VE Bus and some other equipment just to configure it easily(I understand some newer models have an LCD built-in now). On top of that cost there isn't a solar charge controller in that Victron inverter I was looking at. Equivalent SCC from Victron would be what, another $700? So now we're at 3x the cost of the Growatt. So, in my case I could take that $1,400 saved and easily pay for panels to cover that high 50 watt idle. Panels are cheap and that 50 watts is 1.2kwh a day. With 4 hours of sunlight, you're correct ONE 300 watt panel needed to cover that... I bought 3kw worth of panels on one pallet for.... wait for it. Less than $1,400 shipped. $1,200 to be exact. Of course some may have space limitations and not have room for that extra 300 watts of panel to cover that idle draw.
      English documentation could be improved upon. Some kinks in the WiFi dongle firmware could also be improved upon. But one of my main complaints on my Growatt AIO is, no remote temperature monitoring for the battery bank(s). If my batteries go below freezing I will have to rely on the BMS to prevent charging from the Growatt. I don't like that, but I have planned around it. Sadly my BMSs have no way(that I know) of connecting to rs485, and I'm not totally aware if that communication would allow them to report temperature to the growatt to disable charging current.
      If installing solar equipment was my profession I would most likely pick Victron equipment for the customers and Growatt for myself. iPhone for the non-technical, Android for myself. Linux for my PCs, Microsoft Winders for everyone else.

  • @blainecelestaine4543
    @blainecelestaine4543 2 ปีที่แล้ว

    Please take this as a stream of consciousness... I think you said the 48v bms will communicate with the inverter. So what bms is in the 48v batts is it the same manufacture as the 24v ? Is there a firm where update . its a reconstruction of the the batts as 48v using 2 48v bms's rather than 4 24v bms's an option for you?. Thx for sharing

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว +1

      Hi Blaine and thanks for the response, yes consciousness is the primary source of all our electrical needs, the questions is do we know it?... Back to Solar, the BMS will be coming from the 24v batteries, which of course in my setup is 2 connected in series to make 48v. Even though they are connected in series each batteries BMS is operating independently as the charge and discharge rates I watch from the software to ensure functionality. Thankfully the BMS in the battery works as it should, my fix will be adding a backup BMS to this setup to double ensure I don't have any issues prior to expanding the battery bank.
      One of the other viewers was telling me he talked with Signature Solar on if they have any firmware updates and he they said no, at least not at this point.

  • @houseofancients
    @houseofancients 2 ปีที่แล้ว +1

    please try one of the other eg4's for communication.
    also try to use the other inverter
    you have connected a network hub/switch in the past, that may have fried the bms comm port on the inverter or bms

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Thank you sir, that's a good idea as well. I think I'll break out the backup inverter and battery to be extra sure in my attempts. Should I find the fix on the 24v EG4 I'll definitely report here! Thanks for the continued advise.

    • @fred8565
      @fred8565 2 ปีที่แล้ว

      This may sound silly. But have you tried tech support ?

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      @@fred8565 - Thanks for the reply, Tech support these days seems to be a thing of the past, one gives up calling after 3 times when it comes to EG4 support. However Growatt, through many correspondence, videos and diligence did work eventually.

  • @igorkvachun3572
    @igorkvachun3572 2 ปีที่แล้ว +1

    Yes sistema🔋 ⚡🔌💡👍

  • @user-lt3pg8iz5n
    @user-lt3pg8iz5n 2 ปีที่แล้ว

    Hey buddy, how can I contact you? I have some questions about the Growatt SPF 5000TL HVM-P inverter

    • @ahhlifesgood1956
      @ahhlifesgood1956  ปีที่แล้ว

      - Go to the contact page of my channel and you'll see the contact information

  • @kurtzxcvb3481
    @kurtzxcvb3481 2 ปีที่แล้ว +1

    When do the crossover cable do you make sure you orientated the plug in the right direction plus when you press the pins did you keep them pin crossed correctly positive and negative d - D+

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Hello Kurt, that's a great question. Of camera I actually reversed the same setting making another cable to be absolutely sure on the D+ setting in the event 8 was actually 7, and vice versa. Thanks for the thought, I'm really interested to see if some out there actually can get the 24v batteries BMS to communicate with the 48v Growatt inverters. I believe it's a difference in voltage, but could be wrong.

  • @jimmyg6215
    @jimmyg6215 2 ปีที่แล้ว +1

    I gave up on getting mine to work. I have 5 batteries 3 bought in 2020 and 2 in 2021. One of the 2021 is the EG4 version and that one will not even communicate with the other 4 because the BMS’s won’t communicate with each other over RS485. I am only using the software that comes with the batteries. After talking to signature solar they just said the BMS’s are incompatible and no fix… End of conversation from them. Not the best CS and I did at least ask about getting different firmware, but it was deer in the headlights over the phone from Signature Solar. Don’t get me wrong I think the batteries are great and fit my needs and application, but not having the batteries even communicate with each other is a show stopper. I never got any of the 2020 or 2021 batteries to communicate with the growatt. In the end I abandoned the the setup and just use a small low power PC with USB to RS485 adapters to communicate with the 5 batteries. One adapter does 4 batteries that are daisy chained with each other, and 1 adapter does the newer EG4 battery that is a anti social BMS. Also I learned that if you do get the BMS to communicate with the Growatt, if that communication is lost for whatever reason, bad cable, communication issue in battery or inverter, family member saying what happens when I pull out this cable, the inverter immediately shuts down, even if the batteries are at 100% SOC. Since mine is installed in a cabin with internet communication, but it is not my primary residence, just a place we go on weekends, I can’t take the chance the batteries and inverter will shut down due to a communication glitch. In the end I just went back to user setting on the Growatt, and use the low power pc so I can remote in and check on the batteries.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Hey Jimmy thanks for the detailed response, well appreciated as I understand 100%. Like you, I like the batteries and am content using them under the "USER" configuration, but it'd sure be nice to take advantage of the BMS they advertise! I don't believe there is any communication between the Inverters and EG4's, more so that we're fully dependent on the batteries BMS either Opening/Closing the electricity as need be and sending a signal to the inverter. Same on the inverter side, they either deliver on demand if the BMS asks or not. The BMS of the batteries thankfully has been programmed with enough detail that it manages on its own, AS LONG AS IT DOESNT FAIL. I'm planning to add a backup BMS before adding more batteries, 20kw I could handle losing but 60kw would make me a bit RED. Cheers

    • @jimmyg6215
      @jimmyg6215 2 ปีที่แล้ว +1

      @@ahhlifesgood1956 under option 5 set battery to LI and then select option l01 and it should display option 036. That allows the batteries and Growatt to communicate directly and show the data on the Growatt screen. Also the batteries have to have the dip switch set to option 1 I believe. There are several videos on utube from signature solar and a few others showing how to set up the Growatt to accept communication from the EG4’s, but mine did not work. They said the EG4 I have is an older BMS from earlier this year that is not compatible. The older batteries I have are not compatible.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      @@jimmyg6215 - Yes I played around with these dip switches configuring in various arrangements to no avail. Thanks for the help! I think I'm going to build my next batter bank, we'll have to see. Cheers

  • @fencer4353
    @fencer4353 2 ปีที่แล้ว +1

    We designed for straight through

  • @golden4o
    @golden4o 2 ปีที่แล้ว

    Hello, if you still have the issue check that video. I made a quick video how to fix it - th-cam.com/video/g3j5mpVz-qg/w-d-xo.html
    Let me know if this helps.

    • @golden4o
      @golden4o 2 ปีที่แล้ว

      I've just noticed that you have the newer inverters.
      They have Communication hub included. You just need to connect your batteries to the BMS port (not RS485) of the Host inverter and that is it.

  • @rapidnetrick
    @rapidnetrick 2 ปีที่แล้ว

    So NOT an expert...
    I believe you should plug from the rs485 port on the inverter, to the empty bat-coms port on the first battery, then each battery daisy chains to next...
    The rs485 port on the battery I believe is to plug a computer into using a usb to serial adapter.
    I do believe you had the dip switches correct, device 0 is first battery, the next position is reserved for the inverter...
    I would assume you can verify with the vendor you purchased from.

  • @mikecoxfamily
    @mikecoxfamily 2 ปีที่แล้ว

    Hi, I'm having EXACTLY the same problem (code 04 and 20 ) with Pylontech US2000 batteries and Growatt SPF5000es inverters. Everything works fine when USER is selected but faults out with Li. I suspect a cabling issue. See this video th-cam.com/video/HdKWpzs_8dg/w-d-xo.html where they solved their problems by swapping out the wrongly supplied cables for basic LAN cables. They had a slightly different setup but it all came down to communication issues between inverters and batteries due to the cables beig incorrectly spec'd. I'll let you know how I get on. Cheers.

    • @mikecoxfamily
      @mikecoxfamily 2 ปีที่แล้ว +2

      Update. Although I'm using sightly different batteries to your setup, maybe the following will help with your trouble shooting. I came across the following from growatt from an online forum re this fault code sequence.(seems common) To connect 5000 es to Pylontech US2000, program 05-36-L52(SPF5000TL HVM-WPV/SPF5000ES). On the battery, DIP 1000 (ON-OFF-OFF-OFF) this gives 9600 baud rate and sets batt bank to zero adddress. Swapped out supplied CAN/RS465 cables for basic LAN cables. From CAN port on BATT to BMS on inverter. This setup is now working perfectly. Full coms between inverter and batts. I recon the supplied cables could be a big part of the problem as I tried them with the new settings (05/36) and the faults returned. Hope that all makes sense.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Happy Holidays Mike and thank you for tge comments, this could also be a possible solution orfix to all of us having the same issues. I'll check out the video you sent and most definitely give it a try after the Holidays and report back here on my findings, cheers!

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว +1

      - Please report back on your findings as well, I know many poeple are looking for solutions as well.

  • @offgridliving4128
    @offgridliving4128 2 ปีที่แล้ว

    I don’t like this at all. I do crap loads of research and it seamed that this battery setup is the way to go. Now it seams the 2021 batch is a dud. I ordered and paid for 6 of them they are in transit now. I’m starting to see bad postings on DIY solar forum also.

    • @ahhlifesgood1956
      @ahhlifesgood1956  2 ปีที่แล้ว

      - Off Grid, don't get me wrong the EG4's are working great, charging and discharging as a battery should very efficiently. The only issue is the BMS speaking to the Inverters. Thankfully the BMS of the EG4's is good enough to allow AMPS in or OUT intelligently enough where the inverters help or backup is not needed. My plan is to install an additional BMS between inverters and batteries as a backup prior to expansion. If you have EG4's coming I wouldn't worry, they seem like really good batteries for myself to this point (9 months)... Lets hope it stays that way.