Rectifier Huawei R4850G2 48V 42~58V 3000w

[dominik h]

installed weChat and scaned the picture and give weChat all rights on my phone, that was all I had to do.

 

[TIOK]

Is the app installed separately on the phone, or does it open in WeChat? And why aren't the settings changing? Does the app not save them, or is the controller not responding? Maybe a password is also required.

 

[dominik h]

The program is running in WeChat.
The controller accepts currents 30A and lower. 31A and more shows an error.

 

[j bjork]

How about voltage, can you set it over 58V? Maybe the controller could be for 100v 30A

 

[dominik h]

Yes I can enter 100V.

Seller sent me a screenshot from probably a different version from the program or after a login, there the default voltage and current can be changed.
In my App these values are missing.

 

[TIOK]

Программа состоит из нескольких страниц, нужно прокручивать их. Вы опубликовали здесь только скриншот первой страницы. Максимальное значение тока устанавливается на другой странице.

 

[dominik h]

the Screenshot from the seller



My pages

 

[TIOK]

No access to setup mode. You need to enter a password.

 

[hardyvo]

Hi folks, I own a R4850g2 which only delivers about 15 amps. I know, that it has worked with 40 amps before. Has anybody an idea, how to repair it?
If I set it for example to 10 amps by can bus, it works as expected. But if I set to 20 amps, it only delivers around 15 amps (15.6A to be more precise)

 

[dominik h]

Have you accidently set an input current limit?
This will also reduce output current.

Rectifier Huawei R4850G2 48V 42~58V 3000w

Depends on your plug. probably you have a different version. I had four versions plugs until today and all worked with the black wire from start. The plug next to it is CAN. The fourth not on my picture has 3 more wire pairs on the right side. CANID HEX 10 80 80 FE broadcast to all...

endless-sphere.com

 

[foxbat]

Hello
Finally I fitted the touch screen version and it's working but i have the following problem: after ~ 30 seconds it stop charging for ~ 30 seconds when start to change again. and so on. Any ideea please? Thank you

 

[foxbat]

Problem solved My mistake. I did some changes in BMS and I forgot (charging current). So is not about the controller but stupid user mistake (me

 

[foxbat]

Hello. I have another one - the max current setting - 30 A. Any clue please? Even I try to set 40, 50 A - the setting on the screen showing 30 Amp. Any clue please? (I cannot charge with more than 1.7 Kw ( )Thank you

 

[foxbat]

Hi folks, I own a R4850g2 which only delivers about 15 amps. I know, that it has worked with 40 amps before. Has anybody an idea, how to repair it?
If I set it for example to 10 amps by can bus, it works as expected. But if I set to 20 amps, it only delivers around 15 amps (15.6A to be more precise)

same here. I'm stuck at 30Atop.

 

[dominik h]

The miniprogram does not allow to set more than 30A.
I contacted the seller many times, but since 3 month there is no solution.
I will try to get my money back, because they sold something different than advertised.

 

[greasysock]

I have 2x R24/4850N1 (24/48v) units and can't seem to get them out of their default ~27v offline voltage

Has anyone had this issue? I've successfully sent the online voltage to a rectifier via canbus every 1s and it's sending back a successful ack each time and my multimeter is reading 27v even though I'm commanding 29v, the rectifier has no load attached.

I also have set the offline default voltage and it's not applying either when I restart without a canbus connection. I'm sort of at a loss, not sure where to go from here, it seems really simple to control via canbus from everything I've read

I've dug through the translated canbus docs and have tried a bunch of different things like sending an online command, changing the hardware address, etc.

 

[dominik h]

Quote from my post #227 in this thread, asking for the voltage change function from the R24/4850N

"The voltage change is done with the two port wires, the wires left side next to the can"

 

[greasysock]

I have them both shorted to ground, which is how the rectifier turns on, do you mean that by connecting only 1 of them it will put it into 48v mode?

I want them in 24v mode, I just can't seem to adjust the voltage with 24v mode, they're at their default 26.8V, I'm second guessing if these can be adjusted but I found a product page that claims they can be.

华为R24/4850N1通信电源24v整流模块48v 华为R24/4850N1

华为R24/4850N1,华为整流模块,华为48V通信电源

www.huaweidianyuan.net

Here are the ACKs for my control messages,

0x134 is my auto fan command, no error
0x132 is my turn on command, no error
0x1 (27.9V) is my online voltage command, no error

In my loop every second I am sending a bulk query (0x40) and also control messages (0x80) for the voltage/fan/and to turn it "on", here is a demo run from start to finish to show that the voltage is not changing at all with me turning it off at the end:

09:40:22.127: Huawei[1]: Online!
09:40:23.356: Output Voltage: 26.83789V DC
09:40:24.586: Output Voltage: 26.858398V DC
09:40:25.813: Output Voltage: 26.858398V DC
09:40:27.043: Output Voltage: 26.919922V DC
09:40:28.170: Output Voltage: 26.923828V DC
09:40:29.400: Output Voltage: 26.923828V DC
09:40:30.633: Output Voltage: 26.923828V DC
09:40:31.763: Output Voltage: 26.923828V DC
09:40:32.995: Output Voltage: 26.923828V DC
09:40:34.225: Output Voltage: 26.923828V DC
09:40:35.458: Output Voltage: 26.923828V DC
09:40:36.587: Output Voltage: 26.923828V DC
09:40:37.816: Output Voltage: 26.923828V DC
09:40:39.043: Output Voltage: 26.923828V DC
09:40:40.169: Output Voltage: 26.923828V DC
09:40:41.401: Output Voltage: 26.923828V DC
09:40:42.632: Output Voltage: 26.923828V DC
09:40:43.860: Output Voltage: 26.921875V DC
09:40:44.990: Output Voltage: 26.923828V DC
09:40:46.222: Output Voltage: 26.923828V DC
09:40:47.453: Output Voltage: 26.923828V DC
09:40:48.581: Output Voltage: 26.923828V DC
09:40:49.810: Output Voltage: 26.923828V DC
09:40:51.041: Output Voltage: 26.921875V DC
09:40:52.271: Output Voltage: 26.923828V DC
09:40:53.401: Output Voltage: 26.921875V DC
09:40:54.634: Output Voltage: 26.921875V DC
09:40:55.871: Output Voltage: 26.923828V DC
09:40:57.002: Output Voltage: 26.923828V DC
09:40:58.236: Output Voltage: 26.923828V DC
09:40:59.469: Output Voltage: 26.922852V DC
09:41:00.599: Output Voltage: 26.923828V DC
09:41:01.833: Output Voltage: 26.923828V DC
09:41:03.066: Output Voltage: 26.923828V DC
09:41:04.195: Output Voltage: 26.923828V DC
09:41:05.426: Output Voltage: 26.921875V DC
09:41:06.660: Output Voltage: 26.921875V DC
09:41:07.891: Output Voltage: 26.923828V DC
09:41:09.021: Output Voltage: 26.923828V DC
09:41:10.253: Output Voltage: 26.923828V DC
09:41:11.486: Output Voltage: 26.921875V DC
09:41:12.615: Output Voltage: 26.923828V DC
09:41:13.848: Output Voltage: 26.921875V DC
09:41:15.080: Output Voltage: 26.923828V DC
09:41:16.208: Output Voltage: 26.923828V DC
09:41:17.439: Output Voltage: 26.923828V DC
09:41:18.673: Output Voltage: 26.923828V DC
09:41:19.904: Output Voltage: 26.923828V DC
09:41:21.035: Output Voltage: 26.923828V DC
09:41:22.267: Huawei[?]: Offline!
09:41:22.475: Huawei[1]: Online!
09:41:23.603: Output Voltage: 26.923828V DC
09:41:24.831: Output Voltage: 26.923828V DC
09:41:26.064: Output Voltage: 26.921875V DC
09:41:27.197: Output Voltage: 26.923828V DC
09:41:28.430: Output Voltage: 26.923828V DC
09:41:29.662: Output Voltage: 26.923828V DC
09:41:30.897: Output Voltage: 26.923828V DC
09:41:32.028: Output Voltage: 26.922852V DC
09:41:33.258: Output Voltage: 26.923828V DC
09:41:34.487: Output Voltage: 26.923828V DC
09:41:35.613: Output Voltage: 26.923828V DC
09:41:36.844: Output Voltage: 26.751953V DC
09:41:38.068: Output Voltage: 26.317383V DC
09:41:39.298: Output Voltage: 25.876953V DC
09:41:40.428: Output Voltage: 25.455078V DC
09:41:41.659: Output Voltage: 25.036133V DC
09:41:42.890: Output Voltage: 24.618164V DC
09:41:44.020: Output Voltage: 24.214844V DC
09:41:45.253: Output Voltage: 23.829102V DC
09:41:46.484: Output Voltage: 23.4375V DC
09:41:47.714: Output Voltage: 23.05664V DC
09:41:48.841: Output Voltage: 22.672852V DC
09:41:50.071: Output Voltage: 22.305664V DC
09:41:51.302: Output Voltage: 21.938477V DC
09:41:51.920: Huawei[?]: Offline!

 

[dominik h]

It is a few years ago, but with only one connection from minus to top or bottom you can choose between 24 and 48V before startup.

The voltage programming was done the same way like the r4850g2, but I only ever had one of them and sold it a few weeks later.

The efficiency of them in 24V mode is not the highest.

 

[greasysock]

Okay thanks for the info! They should pretty quickly adjust their voltage on a voltmeter at the bench with nothing else attached, right?

I'll mess around with those 2 cables to see if maybe just having one connected will fix it

It seems like mine is in some read only state and stuck at the default voltage with no fault codes/error states with a solid green light

 

[greasysock]

I tested and only attaching the top pin the rectifier does not turn on, reports 0v on the canbus, attaching the bottom pin the rectifier turns on but is still stuck at the same voltage. Both units are doing this. I suspect they're locked down or something Both configurations allow me to send canbus commands that are valid. If i send a command for 48v I get an error so they're definitely in 24v mode.

 

[jac53]

I tested and only attaching the top pin the rectifier does not turn on, reports 0v on the canbus, attaching the bottom pin the rectifier turns on but is still stuck at the same voltage. Both units are doing this. I suspect they're locked down or something Both configurations allow me to send canbus commands that are valid. If i send a command for 48v I get an error so they're definitely in 24v mode.

According to its documentation, in 24V mode it only adjusts from 21 to 29V, so it's normal to get an error when trying to send 48V. You need to learn how to switch from 24V mode to 48V mode. In that mode it's possible to adjust from 42 to 58V. I didn't know these modules with this configuration existed, I only knew the 48V ones.

 

[dominik h]

I can answer my question now. The voltage change is done with the two port wires, the wires left side next to the can

That was how it worked for me.

Probably you have to connect both to minus for changing the voltage. I have only done it once in 2022 and then sold the unit as I changed to the more efficient Eltek FP2 24V 1800W rectifier.