Rectifier Huawei R4850G2 48V 42~58V 3000w

Batteries, Chargers, and Battery Management Systems.
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Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by vicens » Jan 20 2017 11:18am

What do you think of this rectifier?

High efficiency > 96%
Ouput voltage 42~58VDC, default value 53,5VDC
Ouput Power 3000w (176~300VAC)
Weigh =< 2 KG

The datasheet.

https://www.google.es/url?sa=t&source=w ... beGg80zrdg

Where to buy it at a good price.

http://s.aliexpress.com/vMfQbiyu

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by amberwolf » Jan 20 2017 12:32pm

Is it for a fireworks show? To hook across the mains? ;)


We can't really tell you if it's good, bad, or ugly unless you tell us what you need it to do; what project it is for.

You'll need to post up all the details of that project for us to help you with it.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by fechter » Jan 20 2017 12:34pm

It looks OK, but what are you going to use it for? It sort of looks like it's not really CC/CV so it might not be so good as a battery charger.
"One test is worth a thousand opinions"

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by vicens » Jan 20 2017 3:58pm

Is to charge the battery of my vectrix. 38s22p(sanyo 18650-ga) li-ion battery 10kwh. Charging at 4.1v per cell. Charging 156v cv.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by fechter » Jan 20 2017 4:24pm

I don't think it will be good for a battery charger. It might work, but you'd be running it at the maximum current during most of the charge so it might overheat or fail early. I didn't see an adjustment for the current limit.
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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by vicens » Jan 20 2017 4:52pm

The charging can be at 230v single phase or 400v three phase more neutral.

posible problems. With different plugs and powers:

Slow charging. Connector schuko 16A Single-phase. They can only charge at 12A (2.8kw) continuously. Or charge at 16A (3.7kw) for a maximum of 2 hours. To charge at home. To charge on the street is easy to find.

Semi-fast charging. Connector type 2 mennekes. Single-phase 16A (3.7kw) or 32A (7.4kw). To charge on the street is easy to find.

Semi-fast charging. Connector type 2 mennekes. Three-phase 16A (11kw) or 32A (22kw). To charge on the street is difficult to find.

Fast charging. Connector type 2 mennekes. Three-phase 63A. To charge on the street is very difficult to find.

I have a cable from type 2 mennekes to schuko. Single phase to 16A (3.7kw). Operate on a single-phase and three-phase type 2 mennekes. This cable does not work with the fast charging 44kw mennekes type2. The connector is different. The connector is the longest and does not fit. To use it you have to buy a new connector and cables. it is very expensive.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by vicens » Jan 20 2017 4:55pm

fechter wrote:I don't think it will be good for a battery charger. It might work, but you'd be running it at the maximum current during most of the charge so it might overheat or fail early. I didn't see an adjustment for the current limit.
I will look for another. That the current limit can be selected.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by amberwolf » Jan 20 2017 7:25pm

Why not use the Meanwell HLG LED PSU series? They are voltage and current adjustable, and potted. (but kinda heavy due to the potting, I think). Fanless, can operate at their ratings continuously AFAIK. About 7lbs each, size of a trade paperback book.

They are isolated, so you can series and parallel them. For instance, the HLG 600 series are 600watt, so at 58v they'll do over 11A. Series two of them for 118v, and 11A. Parallel another set of those and it's 118v at almost 24A.

Adjusted down in voltage to their minimum, you'd probably get the charge voltage you're after with three in series. Or use one set that's a lower voltage model in series with two at the higher.

AFAICR they are 230VAC or 115VAC in.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by vicens » Jan 21 2017 10:09am

amberwolf wrote:Why not use the Meanwell HLG LED PSU series? They are voltage and current adjustable, and potted. (but kinda heavy due to the potting, I think). Fanless, can operate at their ratings continuously AFAIK. About 7lbs each, size of a trade paperback book.

They are isolated, so you can series and parallel them. For instance, the HLG 600 series are 600watt, so at 58v they'll do over 11A. Series two of them for 118v, and 11A. Parallel another set of those and it's 118v at almost 24A.

Adjusted down in voltage to their minimum, you'd probably get the charge voltage you're after with three in series. Or use one set that's a lower voltage model in series with two at the higher.

AFAICR they are 230VAC or 115VAC in.
Of the series hgl would put three of 600w. I've been watching him.

But it would be much better some 1000w. With 3 are 3000w.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by amberwolf » Jan 21 2017 11:25am

Maybe they make bigger HLGs? :)

Or you can parallel them, so two 1800w strings for up to 3600w charging. :) (This was done on a race motorcycle, I think it was at Laguna Seca? Can't find the post though).

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by vicens » Jan 21 2017 3:55pm

amberwolf wrote:Maybe they make bigger HLGs? :)

Or you can parallel them, so two 1800w strings for up to 3600w charging. :) (This was done on a race motorcycle, I think it was at Laguna Seca? Can't find the post though).
HLG the largest is 600w

A configuration with two parallels and three series is already done.

http://300mpg.org/2015/07/24/charging-w ... -supplies/

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Jul 02 2018 3:25am

vicens wrote:
Jan 20 2017 11:18am
High efficiency > 96%
Ouput voltage 42~58VDC, default value 53,5VDC
Ouput Power 3000w (176~300VAC)
Weight =< 2 KG
Did anyone ever test this, maybe with a 14S LiIon pack, which has exactly the required voltage range?
I like that it says it can be monitored and adjusted via CAN bus, but I wonder how complicated that will be and if the protocol is published as it would need to be?
The power/weight ratio is almost unbeatable, if it is not potted than maybe it is repairable and even modifiable? I Think I am also making progress with my inverter welder conversion to become a charger while maintaining the welder function: viewtopic.php?f=14&t=94597

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Jul 05 2018 6:19am

Meanwhile I got myself one of these units, indeed 1900g for supposedly up to 3kW (€60 delivered) ! I am very curious to open it up and see how they do it. I also ordered a CAN bus shield for Arduino ( MCP2515 ) because I don't know if the thing will start up by itself or needs CAN commands? Anyway I read that one can get all kinds of Info from the device via CAN - just not sure if there is a protocol one would have to know?
Anybody else experimenting with this unit? I found the R4850G2 pinout here:
https://fccid.io/ANATEL/03409-13-03257/ ... EE9A16/PDF
R4850G2-PinoutRectifierModule.png
Huawei-R4850G2-Pinout
R4850G2-PinoutRectifierModule.png (127.13 KiB) Viewed 3650 times

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Oct 23 2018 3:12pm

DSC_4382web.JPG
DSC_4375web.JPG
DSC_4374web.JPG
These pictures show a very well designed SMPS using high quality inductors and other components. One one side the Line input is carefully conditioned till it ends up in 2 fat 470uF 450V capacitors, from there it returns on the opposing side and with more induction than one could expect the power is routed to that impressive >50V >50A output. Have not yet tried to operate it while I haven't even decided how to solder? the Power cables and how to further package the thing to be road worth...

My plan stands to develop an Arduino based charge control and analysis module that may also feature a capacitive step up charge pump to become usefull for my 80V LiFePO pack. The same circuit could see use also in the Inverter Welder conversion thread viewtopic.php?f=14&t=94597

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Nov 12 2018 6:09pm

I have been advancing, meaning I found the box and wired power in, I get the green LED after boot, with a feeler voltage of about 1V on the output, but no more...
DSC_0154web.JPG
RawBeginningsPS
From a question posted on Piclist i got a hint that those are actually chargers from conception, so I applied logic as such:

If it is supposed to be a charger maybe it expects a voltage to begin with to add its juice to? Similar to a cell phone battery protection circuit that may need to be woken up by charging its internal battery beyond a certain threshold if the battery has been sitting for too long, this supply may not dare to power up what appears to be a dead battery? Could be an option set within some internal config register though... I could test giving it some voltage even before powering up...
by the way there is a pre-charge pin, which although not indicated must belong to the negative terminal of the output DC because that negative PCB contact is recessed as if for hot plugging, I doubt it has any significance in regular operation tough?

The green LED is the one that remains on, but if I probe around and bridge that ~1 Volt feeler voltage that Voltage goes zero and the red LED comes on.
I have put it in a case with a DPS5020 50V 20A digital power supply to provide a side function while I develop my own charge pump and controller. So there would be a capacitive load if the supply was to do a test run just like that... I thought about trying Huawei directly, so registering with them is a good idea for sure!
On my current fattest battery 3000W would be almost 2C, so its exciting - if I managed to direct that much power some day - the idea to try considering 10-15 minutes stops, basically ending if any of the banks gets even close to a save voltage limit...
The second battery Panasonic cell 14S 9P 1,3kWh is right there in the sweet spot of this supplies voltage where I might not have to do much to get the best matched power...

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Nov 20 2018 10:25am

I have searched a lot and entered into the world of these communication power supply cabinets...
I found that they usually contain LiFePo batteries, and the supplies can charge as well as supply the continuous operational current. With half a million hours MTBF ( https://www.cdiweb.com/datasheets/huawe ... %2005-.pdf ) they are build like y should want to build them and they are probably worth every dime of the hundreds of monetary units they usually cost! That I got mine for €60 inc. shipping could get me suspicious that it might be a reject, the ebay seller specializes on server components clearance and he has no reliable access to get that deal again...
The only other supply in that power range I have found so far (a HP ESP120 I put on order for curiosities sake) is huge and weighs 3-4 times as much! No wonder there is a lot of interest in this little Huawei miracle!
HuaweiPowerRectifierModules.png
All Huawei Power Modules
Meanwhile I established a contact with the publishers of https://www.huaweipowersolutions.com/rectifier-modules which specialize on just Huawei power modules. They confirmed that Huawei considers its CAN bus protocol as proprietary. The claim 'Customers can easily match the output with our DC-DC converters to generate different voltages for non-telecom applications.' shows that they are interested to provide like listed on their about page: products to users of 'Industrial applications, Solar applications,... LED applications' and I am sure they are eager to add electromobility to that list!

Another lead that might hide success are that there are only 2 signal wires (CAN +/-) specified on the pinout I found but in reality there are 4 fingers in that section, leaving 2 unknown ones that are not identified on the pinout sheet. I'll try tracing them when I open the unit next.

Chances are somebody already hacked the protocol, just that it is hidden away in some Russian or Chinese forum and it will just take time till somebody finds it and brings it into this language space...
For example I found about the System Management Unit SMU02B via the videos of this Alejandro (si entiendo espaniol ;) https://www.youtube.com/results?search_ ... wei+smu02b
He was kind enough to respond but he doubts that there is a way to operate the rectifier outside its usual nest of controllers but he knows about peoples interest in his videos because I am not the only one asking these questions...

I am going to advance on my CAN Arduino setup and it might already exist or its probably easy enough to write a sniffer that logs everything onto an SD card. Lets work together to find somebody to allow us to 'sniff' the required CAN interaction it in its original environment!

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by eee291 » Nov 23 2018 5:05pm

https://dutchrfshop.nl/nl/home/961-huaw ... ruikt.html

In case you need some more, 5 in stock currently.
About 60€ shipped.


EDIT: these are the 2000W PSUs, not 3000W.
If you want the 3000W one you can get it on Aliexpress for about double the price.
https://www.aliexpress.com/wholesale?ca ... ei+R4850G2
You may have to pay taxes as well.
Last edited by eee291 on Nov 30 2018 8:18am, edited 8 times in total.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by BotoXbz » Nov 23 2018 11:14pm

Just dropping by some info:
0x108180fe  01 00 00 00 00 00 xx xx    电压 a6 c0 - ea 67 01 03 00 00 00 00 xx xx    电流 00 00 - 04 e2 波特率125k 扩展帧 数据帧
If you Google 0x108180fe you can find the source.

Also interesting: https://www.yleee.com.cn/thread-62600-1-1.html

I don't have one of these PSUs to test this, but I want to buy one if I can use it to charge my 14S battery with it.

Edit, Jackpot:
Image

OCR:

Code: Select all

0x108180fe      01 00 00 00 00 00 xx xx     电压            a6c0 - ea67
                01 01 00 00 00 00 xx xx     默认输出电压      c000 - e99a
                01 03 00 00 00 00 ii ii     电流            0000 - 04e2
                01 04 00 00 00 00 ii ii     默认输出电流      0000 -

xx xx = 1022 x 输出电压
ii ii = 197 x 输出电流

55.2V = dc 5e
15.0A = 01 27

======================================================================

0x108140fe      00 00 00 00 00 00 00 00
0x1081407f
                01 70 00 00 00 xx xx xx
                01 71 00 00 00 00 xx xx     // cb b8
                01 72 00 00 00 00 xx xx
                01 73 00 00 00 xx xx xx
                  74                        // 03 85  03 bf
                01 75 00 00 00 00 xx xx     输出电压反馈
                01 76 00 00 00 00 xx xx     设定输出电流
                  78
                  7f
                  80
                  81
                  82

======================================================================

0x1001117e      00 01 00 00 00 00 ii ii     输出电流反馈 = ii ii x 0.509

波特率125kbps扩展帧数据帧

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by BotoXbz » Nov 25 2018 11:21am

Found some more stuff:
090545vcv9ioelq5z797ib.jpg
090545vcv9ioelq5z797ib.jpg (60.35 KiB) Viewed 2980 times
t0144028b3431065d22.jpg
t0144028b3431065d22.jpg (40.9 KiB) Viewed 2980 times
73_1110015_df8c6a55e9da2a8.jpg
73_1110015_df8c6a55e9da2a8.jpg (18.92 KiB) Viewed 2980 times
114905u448qgyaoos4kk80.jpg
114905u448qgyaoos4kk80.jpg (54.49 KiB) Viewed 2980 times
3脚通信H,4脚通信L
6/7/9脚用线焊短接起来,电源启动。
3 = CANH, 4 = CANL
Short pin 6/7/9 to turn the PSU on.
Seems like you have to short some pins, either internally or externally, to turn the PSU on.

This guy also made a pretty neat mod to his PSU: http://www.crystalradio.cn/thread-1623289-1-1.html

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usertogo   10 W

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Nov 25 2018 4:44pm

Thank you indeed you found the definition of the 2 unidentified pins https://translate.googleusercontent.com ... ylrjqaXsAw directly on a Huawei page! I am going to test pulling them down to GND and report!
Huawei-R4850G2completePinout.png
Huawei-R4850G2completePinout.png (53.38 KiB) Viewed 2961 times

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Nov 26 2018 4:03pm

usertogo wrote:
Nov 25 2018 4:44pm
I am going to test pulling them down to GND and report!

Huawei-R4850G2completePinout.png
The good news is I connected the 2 board detection pins together and pulled them down to the negative 48V (GND) and that was all that was required to get the unit to power up and deliver the proud 53.5V output!
An internal modification was not necessary...

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by eee291 » Nov 26 2018 4:53pm

There is a Chinese guy selling the programmer boards for about 12$ on Taobao
https://2.taobao.com/item.htm?id=565948 ... oSite=main

If you are having difficulty ordering it then you can use a third party service like Taobao Focus.
They will order it for you and ship it to you.
https://buy.tbfocus.com/item.php?id=565948826876
It's in English and they accept Paypal.

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by BotoXbz » Nov 26 2018 6:47pm

usertogo wrote:
Nov 26 2018 4:03pm
usertogo wrote:
Nov 25 2018 4:44pm
I am going to test pulling them down to GND and report!

Huawei-R4850G2completePinout.png
The good news is I connected the 2 board detection pins together and pulled them down to the negative 48V (GND) and that was all that was required to get the unit to power up and deliver the proud 53.5V output!
An internal modification was not necessary...
Nice!
Good thing I've already placed my order @dutchrfshop for one of these PSUs :mrgreen:

And I've also ordered some ESP32 dev boards + TJA1050 CAN transciever from AliExpress and will be making open source firmware to control the PSU through CAN.
With the ESP32 that means you could control the PSU through physical buttons, knobs or Bluetooth and WiFi.
Looking forward to ditching all of my other PSUs and charging 12S, 13S and 14S all with the same PSU and some fancy buttons/lights/display :D

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by usertogo » Nov 27 2018 6:42am

BotoXbz wrote:
Nov 26 2018 6:47pm
Nice!
Good thing I've already placed my order @dutchrfshop for one of these PSUs :mrgreen:

And I've also ordered some ESP32 dev boards + TJA1050 CAN transciever from AliExpress and will be making open source firmware to control the PSU through CAN.
With the ESP32 that means you could control the PSU through physical buttons, knobs or Bluetooth and WiFi.
Looking forward to ditching all of my other PSUs and charging 12S, 13S and 14S all with the same PSU and some fancy buttons/lights/display :D
The dutch shop has only the 35A Units, 1600W is probably enough for most applications, but the R4850G2 weighs only 400g more for 3000W ... Currently the best offer I have seen is €88 delivered from china...

A youtuber I interviewed about CAN told me we would have to know or try which CAN ID this thing communicates on because he claims most CAN chips can not simply catch all traffic, I have not researched these claims further...
Besides to listen to the protocol you have to get the device in a communication environment. I guess the cheapest would be if that $12 CAN adjuster would become available again, I looked at the translated page and it said it was no longer available?
To have a Chinese speaker on the team now is super valuable, thanks guys for participating!!

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Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Post by eee291 » Nov 27 2018 7:04am

I guess he's sold out for now. It'll probably take a week or two.

I'm already heavily invested in the EATON PSUs, so I'm just doing what I can to help from the outside.

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