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Are you saying that the blue and yellow lines are on different scales? 1500w vs 3000w even though they lines have the same vertical height? No, but I know that at this time of day it is 3000w what do my solar panels produce. An inverter produces the maximum that the solar panels can deliver, if...

Are you talking about that? Is this the value in ohms of the red balancing wires? Cell Wire Resistance

@Sleeper85 It works perfectly. The blue LED flashes, what does that mean? Inverter shows message 04 "Low battery level" since I connected ESP32. What value in your program is used for comparison?

So #19 = 55.7v and #20 = 55.5v ?

Yes, I'am talking about this.

Clear and precise answer, thank you

The minimum is 2v, I just tried, with 1.9v difference it doesn't work.

Hello. Can you help me? This afternoon, I was like in the photo. I did a test, I disconnected the RJ45 cable between the SPF5000ES and the battery. Immediately, the Growatt cut off all electricity in the house and indicated an error 04 and 20 (low battery voltage and no communication with the...

Hello, in the Solar Assistant interface I have this on a certain day. What does this mean exactly? I have a Growatt SPF5000 in USB0 and a JKBMS in USB1.

Hello, what is the use of this page in the JKBMS software?

Hello, I'm French, sorry for my bad English. I would like to know if it is better to build a 12v / 100Ah battery or a 24v / 50Ah? For what reason? Thanks you

A fault may occur on the BMS. In this case we are in the dark??? A friend has SofarSolar inverter, when he unplugs the RJ45 cable, the inverter goes immediately to the grid !!

@Sleeper85 Thank you for this detailed explanation. I now better understand the usefulness of ESP32.

So this one first : 0x1000.bin, then 0x8000.bin and and for finish 0x10000.bin ?

I ain't hybrid inverters. I just want to build a storage system parallel to my solar system. Building a 24v battery costs more because it takes twice as many cells compared to a 12v one. Wire size is the only reason?

I just had the same problem today, have you changed your settings? Is it better? What exactly does error 52 mean?

Hello, What device can I use to measure the current and voltage at the output of solar panels and deduce the power?

I have 10 solar panel of 395Wc and one inverter Hypontech HPS4000D. I would like to be able to charge a battery with the solar surplus to cover my consumption for the night. So charger (AC -> DC) --> Battery --> Inverter (DC -> AC). In fact I want to make something like Ecoflow batteries.

Why do we need this app key to make the application work?

I succeeded, but when I connect to the ESP32 it asks me for a password. What should I enter?

Hello, I connected my battery but the Growatt only charges it for a short time. The battery voltage is 54v so not fully charged. I set program 19 and 20 to 56v, program 5 is to BATT USE because there is no connection between the BMS and the Growatt. I currently produce around 2000w, the sky is...

Hello, are you using the LM335 temperature probes with your Cerbo GX? Does it work properly?

When I go to plug in my battery, I wish the network could never charge the battery. Only solar, is this possible? Another example, the solar produces 4000w and the house consumes 3000w, the remaining 1000w will go to charge the battery? Will the inverter send the excess solar to the battery?

Great, it works. How can I get App Key @mrconstantin ?

Good evening, could you explain to me the use of program 12 and 13 in the settings? I can't go lower than 50v, for what reason? I can put 51 or 52v but impossible to put 49v for example. I selected User mode in program 5

Ecoflow is very expensive, you can do the same thing for less money. Let's get back to the original question :)

I know and I don't want to use it to do that. But that's not my original question.

Ok. Where can I obtain this connector?

@mrconstantin where can I download the firmware that should be used with the esp32?

@mrconstantin Does your system (esp32, ...) allow a Growatt SPF5000ES to communicate with a JKBMS B2A20S20p ?

@Sleeper85 i have Growatt inverter SPF5000ES and JK-B2A20S20P, your .yaml run with ?

Is this something that might interest you?

I received the Jkong rs485 adapter and the rs485/usb converter, everything worked perfectly for 4 days and today the battery screen freezes, all the data is frozen. I unplugged and reconnected the USB but it worked fine for a few moments but then it freezes again, really very disappointed...

What did you use to connect your bms to SolarAssist?

@mrconstantin I am French and I use Google translate. I would like to carry out the hardware part myself, do you think this diagram could work with your program? How can I get your program?

Between 100 and 300w for the night so one batterie 12.8v / 100ah looks perfect?

Compressors ??

How do you get 5v or 3.3v? RS485/TTL port provides only Vbat ...

This system will not be alone to supply the consumption of the night, the inverter used will be a grid tie with its output adjustable from 30 to 300w, the EDF network (in France) will complete what is missing.

@Getget How many cells does your battery use? 15 cells or 16 cells?

The 5000ES is unable to export power to the grid. I am advised to use SBU and not SUB. What does "by pass" mean that we see at the top of the image? At the moment I'm like this:

Where can I find the kernel log and dmesg? In the solar assistant settings I have this in "Configuration > System USB devices - Cycle USB power : And this : Kernel Log in Word format. https://www.casimages.com/fi/23103101302625169711788.doc.html

Here are the different settings, do they look good to you?

Hello, my SPF5000ES does not charge the battery completely, it stops for no reason. It indicates a full battery while the voltage is 53.6v. I set #19 and #20 to 55.1v so why isn't it charging the battery? The BMS indicates approximately 3.351v per cell while the Remain Battery is at...

What should I use?

By manipulating the jkbms Vbat, I burned my esp32. I just received the new one. @mrconstantin can you give me a key again please? id: d7f9d108

@ChrisG B2A20S2P works perfecly.

Should the length of the red and black wires (+ and -) coming out of the cells and going to the mppt charger be the same length or is it not important?

There is no absorption time, programs #19 and #20 have the same values as indicated in the manual. It's not good? I don't have link CAN or RS485 between inverter and bms.

I used this diagram ... There is a big problem in your software, for it to work I have to use RS485 port ????

Yes !

Thank you. I just received the new JKBMS B2A24S15P, can I use your mount with ESP32 and TJA1050 to connect it to my Growatt SPF5000ES?

Hello, I am French and I use the google translator. I have a Hypontech HPS4000D and would like to recover all of its data using an ESP32 and HomeAssistant. Have you ever tried? A tutorial on github to advise me? Good day

That ? Which one first?

In the case of several batteries, cables of different lengths cause what problems?

I followed your advice and it works much better. Another question, why does the inverter refuse to let me go below 50v for program #12 ? I would like to go to 49.8v. A special rule to follow that is linked to another program #?

@Sleeper85 In a connection between bms and inverter, it is the bms which sends all the data present in the table below to the inverter. Why with your system, is it user to register them?? The connection between the bms and the esp32 is useless in your case ??

Where did you buy it?

How many volts minimum between both ?

Thank you very much. Merry Christmas. I would like to support it but it doesn't work. Communication between the bms and the ESP32 does not work, no information in the app. In Serial Protocol I have chosen JKBMS.

Hello, I'm French and I use google translate. I don't have any battery on the inverter yet. On this graph the load (blue curve) is 1500w and the solar production (yellow curve) at this moment is approximately 3000w. Why the yellow curve is at the time heckled ? Why will the inverter draw...

Hello. I just finished building my 48v@125Ah battery. Which BMS with balancer is 100% compatible with the Growatt SPF5000ES?

Hello. I have an SPF5000ES and a 16S DIY battery. I just did a test, when the inverter is running on battery/solar and I open the battery circuit breaker, the inverter cuts power to the whole house, turns off and the Fault light turns red . Why does the inverter not immediately return to the...

@silverstone the power supply of the Pi is a 3A, do you think there is not enough current for power the two USB ports? I'm talking about this display.

Program #19 must be greater than #20 ?

@mrconstantin You agree with this diagram?

@Sleeper85 I will try your new version and I will give you a return. How can I stop scrolling any data column right to see alarm messages, etc... ??

The goal is not to run it without a battery. It's just time for me to finish building it.

#19 is Bulk and #20 is Floating? So program #19 --> 55.2v and program #20 --> 55.1V for example ?

Noting :)

@MarcelVo I'm not looking for the password but the APP KEY that @mrconstantin provides based on the ID.

I also asked myself the question but I couldn't find a way to use them.

I will give you more details. Parameter #18 is already on ENA. My battery gives 7kWh, in the JKBMS I limited the discharge current to 65A which gives around 3200w and I authorized in the BMS the excess of 65A for 30s (Discharge OCP Delay(S). When the house (load) does not require more than...

What exactly does this mean? USB0 --> Growatt USB1 --> JKBMS

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