@Rick-admin thanks.  If Trond hasn't had any response either I'll start systematically shaking the tree once I'm back off this drilling rig.

@Matt unfortunately no, I have not had any luck this time either 

@Trond Røsvik@Rick-admin have yall gotten any traction with ARCO?

I have spent a fair amount of time playing with my abms in settings etc. to be honest, the gobbledegook explainations of how the various settings interact and what they do is confusing. for the v...

@Ben @Trond  Thank you both for the help! Ben's firmware did the trick!   Everything was connected @ 250kbps and on the VE.CAN (BMS-CAN was never used) OSEnergy was toggled on also. ...

@Franz appreciated if you post an update from your findings.

Hi Ben, My setup includes just one charge controller and three MultiPlus-II units, all from Victron. The system is configured in ESS mode with surplus feed-in enabled. I’m guessing that&rsqu...

@Franz if amps are 0amp, charger should not charge.  If charger stop charging voltage will be drop slowly. If voltage drop slowly, CVL is lowered as well.   I also don't like this beha...

Try firmware, I have posted here, this is not an official release. https://www.facebook.com/share/p/16CD829GWS/  

In menu, you can make a logfile. Post the logfiles, this gives lots off information for troubleshooting. Is OSenergy CAN toggle to on?

Are you using 500 kbps or 250 kbps bitrate?  I have found that it needs to be 250 kbps. If you use 500 kbps the WS500 will sync to the REC, but you dont get the data on from WS500 on Cerbo. ...

Hopefully someone here can help me out..   WS500-PRO "Output" not displaying on the Victron GX50 / Cerbo GX? Showing as two dashes next to the Alternator Icon..   The WS500-PRO is sh...

Hi everyone, I'm encountering an issue with my 2Q BMS: when the configured end-of-charge voltage is reached, the BMS doesn't lower the voltage accordingly. As a result, my Victron system doesn't s...

Ok, that's disappointing, but not unexpected I suppose.

In sync mode "disabled" it does read the voltage correct. But alternator volt is always 0V, even thought the volt sense is connected.  Even unboxed an second Zeus to rule out HW failure. 

Trond, have you tried to apply a "battery" voltage to the battery sense leads?  On mine they don't sense anything.

So basicly the "battery voltage" just freezes and it continues full speed.. there is no stopping it. Disconnected the CAN cable 3 hours ago, still giving out 100% field. Acually if I turn Sync mo...

Also, once it's been connected to a can buss it will ignore the battery sense.  I installed that as a backup to the can network and was dismayed to find the battery voltage measurement ignored...

I also discovered that in Sync mode (both Victron and REC) If the Zeus looses connection with the BMS it will just continue in Bulk mode and refering to the last known battery voltage. Essentually...

I've been speaking with an engineer (who I sense is new to Arco or the Zeus project).  But his name is written down on the boat and I'm on a drilling rig right now.

Good point.  Thanks for sharing all of your testing and insight.  I have Nick's contact info buried somewhere so I am going to ask him to reply to this post.

My contact has been with Rob and Chris, but I guess they are more of an sales team.  Nick is probably an better bet, will try to get his contact info.   We have been dealing REC for 15...

This dual baud rate issue explains a lot.  I havent had any luck with my contacts at ARCO, but that was a while back.  It might be nice if we could get some insight from them.  I am ...

"REC at 250K and with the cerbo set to 250k bms and the Zeus to Victron follower". EDIT: I noticed now you said Victron Follower. Yes I tried this. And it does not work. It does not read DVC...

Thanks Trond.  This sounds much like my experience.  I was approaching the "rip out the Zeus and replace it" phase. did you happen to try the REC at 250K and with the cerbo set to 250k b...

So far what I have found: NMEA data for Battery, Engine and Charger all neds to be enabled for the Zeus to show up on Cerbo. Disabling this, gives you no data. Just make sure you choose an insta...

@Trond Røsvik I'm on the newer/est version of firmware.  I should be back to the boat in a weekish.  I do know when I changed the comm rate with CANS the bms accepted the change.&n...

@Matt Looking back in older manuals like 2.8 I see that it used to be: CANF 250 and CANF 500  So seems like they changed this in 2.9X.   Just start by sending CANF? or CANS? and see w...

It is likely one of two things 1)  SD card is full 2)  SD card is corrupted. If you remove the 4 screws on the back of the module you will see the SD card.  Push down on the clip ...

@Trond Røsvik thanks.  I'm just blind.  That is what I tried.  Once I get back to the boat I'll try again just to be sure I didn't screw up my first attempt.

@Matt CANS 2 =250 kbps, CANS 3 =500 kbps Page 15: https://www.rec-bms.com/wp-content/uploads/2024/09/UserManual_ABMS_Victron.pdf    

Thanks Trond, once we get our inhouse test engine working and brckets and pulleys made, I will hopefully be able to share some insight

I hooked up an test setup this morning in 30 minutes. No motor or alternator needed really. IF you want to test field current just add an 12V bulb.   Just an Zeus, REC BMS with cells, ...

I did briefly try doing that (changing my rec to 250k and configuring the can for ve.can and bms) but didn't have any luck.  At the time I wasn't putting too much time into it as other project...

@Rick Not sure thats the problem. The fact that you can use the REC on 250kbps in VE.can network is old news. It was an requirement to use the WS500 and this is what I am now testing on Zeus. Bu...

I think you may not have your Cerbo VE.CAN port set correctly.  It needs to be 250k.  Check out this thread for help.  We sent Arco an Active BMS to test last year so they should hav...

Thanks Trond, this is the 2Q Manual and the CHRG instruction does not apply.  Also the Active BMS uses the instruction CANS instead of CANF.  This will be updated in f/w update 2.9.5 to s...

Odd, I'm nowhere near the boat at the moment, but that firmware seems to ring a bell.  Mine did show up on the cerbo as a Victron follower, with the can set to lynx bms ve.can but without the ...

My Zeus automaticly updates to "Zeus Firmware v1.23". An firmware version not yet shown on their webpage, so must be new. I also tested Victron Follow in our Lynx BMS NG setup. And in Victron Fo...

Ok, glad it's not just me.  I did tell ARCO that their documentation sucked...they agreed.   I don't believe that the Zeus participates in DVCC while configured as a rec follower, but at...