Renogy Rego 400ah compatibility anyone? #1069
Replies: 5 comments 17 replies
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The REGOs also have some flavor of CAN bus - but the CERBO-gx doesn't seem to recognize it under any of the VECAN or BMS CAN settings... Seems like we ought to be able to crack this... I had thought Renogy compatibility would cover me - but I guess the REGO stuff is totally diff... |
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OK - I've solved this. It turns out the Renogy Batteries speak "RC-V" CAN bus protocol. With a custom re-wiring of the RJ-45 on the connector for the Renogy One display (using the Cerbo-gx documentation for the pinouts on the VE.CAN and the standardized wire color scheme from the RC-V CAN protocol), I was able to plug this into the VE.CAN bus on the Cerbo-gx and set that bus to use the RC-V protocol. From there it apparently "just worked" - it even seemed to merge the three Renogy batteries I have into one battery bank! While this solution is not using dbus-serialbattery at all, I thought it might be helpful if others run into this problem out in the wild. |
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I will try to find out. |
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Great to hear you got that working, I have RBT100LFP12S batteries, but a rego DC-DC charger that I want to wire into the GX via the RV-C bus. Recently ordered a rego to rj45 cable, but have not had the time to test it yet. |
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@Quadron you need to check out this thread. This is now working. @mr-manuel debugged this on my system and it is currently working flawlessly. I too have RBT100LFP12S (4) connected to the Cerbo with a single RS485 connection. I am using this adapter. If it works for you please be sure to donate, as he spent considerable time making this work. |
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@rogergrant99 I looked through the RV-C documentation and sadly it appears that the data you want to retrieve isn't available. |
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Thanks for looking. The current information displayed is adequate. It would have been nice to get more details. |
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Does anyone know if a VE.CAN bus connection to a Cerbo GX using RC-V will
work for a bank of three paralleled Renogy Smart Lithium Iron Phosphate
(RBT100LFP12S - V2) batteries?
The RS485 LINK and UP Communication Ports of my three batteries are
daisy-chained and the first battery is also connected to a Renogy Bluetooth
transmitter that reports to a phone app. Thus, the Renogy BMS manages the
batteries as one and the phone app reports the status of all and each.
I connected the first one thru a RS485 splitter and VE USB - RS485 cable
also to my Cerbo with dbus-serialbattery driver. It seems to work,
reporting the status of that first battery. The Cerbo disconnects briefly
when the Cerbo and BT module communications collide, but that's not a
big deal. I would prefer not to have to add two more RS485 splitters and
VE USB - RS485 cables and a USB bridge to connect then aggregate the
remaining batteries.
Also, yarrumretep, a wiring diagram and/or picture of your cable would be
great.
…On Sat, Jun 15, 2024 at 7:41 AM rogergrant99 ***@***.***> wrote:
I also have a rego 400ah battery connected and I came to the same
conclusion, the RV-C bus selection worked, but it does not show individual
cell voltages which dbus-serialbattery does, is there a way to get
dbus-serialbattery to talk to a RV-C BMS battery ?
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I would also be interested in this. I have 4 RBT100LFP12S V3 in parallel and would like to poll data from these into the Cerbo GX, I haven't had any luck at all bringing in any data other than the model number into the Cerbo with the driver. They are also daisy chained together in the same manner as yours, with the exception of a renogy battery monitor instead of a BT2. I haven't installed a splitter, instead removing the battery monitor to connect via 485. I did find the modbus manual for these batteries, and it shows the pinout for both CAN and RS485 on the battery end. Worth noting here that the Renogy pin numbers are backwards to conventional pin numbers, showing 1 as 8 and 8 as 1. It lists CAN-H as 6 (3), CAN-L as 8 (1), and GND as pin 4 (5) with a baud rate of 500kbps. I also found that VE.Can is CAN-H on pin 7, CAN-L on Pin 8, and GND on pin 3. This should assist in cable making. I'm going to give this a try and see what I get. Lithium.Iron.Battery.BMS.Modbus.Protocol.V1.7.zh-CN.en.1.pdf |
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A follow up to this. It looks to me from the battery documentation that the RBT100LFP12S batteries are RS485 only, with no CAN. I poked around a bit with qModMaster and found that my batteries are addressed from 48 to 51, but the driver can only read one battery. |
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Thankfully someone finally can confirm that at least something works for them! |
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Pinout by 'conventional' numbering is 6 and 7, or if you are using an ethernet cable, green and striped brown. A would be 7 and B would be 6. However, Renogy numbers the pins backwards, so they say they are pin 2 and 3 as they number the connector backwards. Just remember brown/white and green. The attached image is from a Renogy charge controller, not the battery, so it shows CAN pins also (which the battery doesn't have), but the 485 pins are illustrated correctly.
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with that being said, if you had a Renogy cable with an RJ45 end from the Rego, it should have the CAN pinout the same as above on 8 and 6 (actually 1 (CAN L) and 3 (CAN H) in the real world). VeCan appears to use pins 7 (CAN H) and 8 (CAN L), so an adapter cable crossing those pins over, or recrimping the Renogy cable to wire direct should work. |
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Ok, Thank you. I had tried every single combination, without success, but now it seems to work. I've gotten the first battery talking to the GX. Now I'm figuring out the addresses to use for the other 3 with the Dbus-serialbattery for multiple batteries on one adapter. |
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Hi |
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When you do this does the Renogy then communicate charge parameters to CerboGX and then on the a Victron inverter? Or does it just display battery info? |
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When you do this, the battery communicates battery state of charge, voltage and current (charge or discharge rate) to the gx.
Serialbattery then calculates charge settings for the battery based on the configuration of serialbattery and the controls the connected chargers. They will report "external control" in the gx screen.
Vital is you set the correct settings for the battery in the serialbattery configuration.
Connect the chargers and give it some time. In my experience It can take a few minutes before charging really starts, especially with the multiplus.
I have 4 in parallel with the canbus cables daisychained and it has worked great.
I have not gotten around to implement a battery aggregator but have assigned a single battery as the leading one. That has worked ok up to now. But keep checking your own setup!
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…-------- Original Message --------
On Wednesday, 02/04/26 at 19:54 nshawdvm-cpu ***@***.***> wrote:
When you do this does the Renogy then communicate charge parameters to CerboGX and then on the a Victron inverter? Or does it just display battery info?
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Wondering if anyone has gotten the dbus-serialbattery driver to work with the Renogy REGO 400ah batteries? I have a system with three of those in parallel and I'd like to get them talking to my CERBO-GX. They do speak bluetooth - is there a way to get the bluetooth connection to work?
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