1)  Yes, the REC Active BMS cable includes an end of line terminator in the DB9 housing but keep in mind that in order to increase reliability you need to have a terminator on the two furthest...

We were recently asked by a customer what the charge setting would be if he wanted to lower the voltage settings on his BMS to increase its life span. Although this is possible it is not something...

@Neil Good question, and I believe the answer is yes, we just need to have the address of the second BMS changed to another number.  Default is (2).

As a bit of a follow-up is it possible to run 2 abms through a single wifi gateway?

1) I am integrating a LFP ABMS based battery with Cerbo GX and WS500 already in the system.  I would like to confirm that the REC Victron CANBus cable is internally terminated and it is suffci...

The debate between Zeus and REC Active BMS synchronization is fascinating, especially considering the importance of optimizing energy management systems. Both have their strengths, but syncing them...

Interesting thread on the whole ZEUS vs REC Active BMS sync issue — amazing how many small details can affect a system’s stability. Speaking of dealing with technical stuff, I recently ...

Thanks for information!

@Rick Thanks for the pointer to the git repository. I am a tech guy, but hesitant until it's fully tested to put stuff like this on our boat, unless it's a system that I can live without.It wi...

You don't mention if you need to integrate your BMS with a Victron Cerbo or Wakespeed WS500.  The Active BMS is typically for standalone applications and Victron only allows one primary DC sou...

I've been contenplating installing two seperate 12V LiFePo4 banks rather than just one. What would be the best way to do this with REC BMSes?  I know there are the 2Qs, but they seem to be for...

Hey Steve, to expand on what Ben is saying. Your BMS is in "Balance" mode as per the Green LED, The system controls to the highest cell voltage so it is that one keeping it from fast charging unt...

@stevehmick led flashes? error 3: did you checked manual? To big unbalance, also your screenshot shows unbalance. What is the setting, max allowed unbalance? Something is charging the battery? ...

Hello.  I am trying to troubleshoot my rec active BMS.  I have been off of the boat for 2.5 months and when I got back my house bank (840ah lifepo4) was at 85%.  The BMS did not have...

It looks like you have one cell that is either bad or has got badly out of whack. Before you swap cells heres a few ideas. First I would make sure your cell tap wires and bus bars are all retorque...

Hello! First time posting but I have had (2) 2Q series BMS for a while now, both running separate 48v 500ah systems. It seems at this point that either the batteries have haywire cells that the BMS...

1.29 has made everything better.  These regulators are now smooth like butter!

It seems from this thread https://ogm-energy.com/community/ogm-user-forum/topic/154310/new-rec-bms-and-victron-cerbo-dvcc-integration-guide that the REC-ABMS now support VE.CAN. I would be very gr...

I'm on 1.28 and DVCC was working, but no longer.  I've got my dvcc currently limited to 12 amps charge current, but the Zeus regulators both want to follow the REC current limit of 240a.  ...

The 11th World Battery & Energy Storage Industry Expo (WBE 2026) Date: September 16th-18th, 2026 Venue: Area A, China Import and Export Fair Complex Address: No.380, Yuejiang Zhong Road...

@Ben what do you mean by "The switch is NC model, keep that in mind."? The ABMS mini switch I refer to has to positions and appears to be a simple on-off switch that connect power to the BMS. ...

Update. I still experience randon disconnections. I have tried different firmware configurations and gotten the latest from Tine. Currently as running as follows: The signal is otherwise strong. T...

We have many users with 4P4S EVE packs running the REC Active BMS without any need to add balancers.  Unless you are mating cells with different capacities the Active BMS will balance your pac...

Hi all, I'm building and testing a 3P4S battery using EVE314Ah cells. The battery's size is pushing the limits of the ABMS's balancing capabilities. I'm considering integrating a Heltec 5A active...

@Hans to have a battery protect, as low voltage discontactor, you need to know, IF only one cell comes low, the Battery Protect will not "see" this. If your cells are perfectly balance also at the...

If you do any bench testing, measurments on the field wire, always have a load connected to the blue wire.  A resistor from 1k would be enough.   On the bag from cable harness is a warn...

Hi, I believe you have to log on to the routers ip adress ( that the wifi module are connected up to) plus the port number :4799. But then I believe you need to setup a DNS server adress as the ro...

A few weeks ago, I received 1 REC Master 9M and 3 of the new REC2Q Slave units for a 12V 3-parallel bank installation directly from REC in Slovenia. Experiences like this highlight the importance o...

I have repaired a couple of V1.0 WS500 an the field driver is U5 (IRS21867). On these units, the field has been missing, not fully on like in your case. But I would start by meassuring U5, p...

Yes. V1.28 seems to fix a lot of the previous bugs. I can confirm DVCC now works. 

@Rick This is where I wish I still had easy access to an electronics rework bench, as I can more or less see what's going on with the Field Driver circuit.  We'll probably reach out soon.

Hans, I have heard of this happening on older W500s and I believe they hardened some of the circuitry on the newer versions. We dont like to see this happen so if you'd like to upgrade to the new...

@Rick Yeah, looks like I'll have to pick up the wifi module.  In this case, it's for the rest of the DC system on my boat (lighting, VHF radio, AIS transponder, instrumentation, etc...). Righ...

Hi Everyone, I'm wondering if I've managed to cook the field output on my Wakespeed in the worst possible way. I have a P-Type alternator, and the P-Type harness. At my alternator, the red Alt + i...

Hey Hans, glad you're making progress.  In the latest f/w version there is no longer a separate 2 relay version.  Using the "Tasks" page in the Wifi module you can set it to drop out on l...

So after an email from Tine, I went and checked my system. Turns out for the past 3 years I've had my contactor leads flip-flopped. RE1 was controlling the contactor on the charging side of the wor...

@Matt Nice!! Thanks for letting us know

Hi All, I've been happily running my ABMS for several years now, in an all up Victron+REC+Wakespeed configuration. During that time, I've only updated the firmware on my CerboGX, leaving the REC a...

Woohoo!!!   I just updated my regulators today and they're actually following DVCC!  Happy day!

Loading the files directly onto the SD card did the job - thanks.