Problem solved! The -DEV firmware mentioned above did not work but after a few emails and phone calls, Al got me sorted out with a patched firmware. They are working on releasing the new revised f...

@Arkom Did you succeed in driving the MG1 with the Wakespeed after all?Thinking about the same for a boat 48V system. ThanksA

@Rick @Al    Thanks to you both for the quick response. I did the update and now it seems to be stuck unresponsive with a very dim green led when in running mode. The app doesn't recog...

@Al Thomason    Thanks for the quick response Al.  If you email it to me at support@ogm-energy.com  I will see that Rance gets it. Best of the season! Rick

@Rance Kilbourn   (Disclaimer:  Al from Wakespeed). OK, we have found something in the WS500-PRO code that looks to be your issue.  Or at least, could well be…  It is r...

@Al sounds good, thanks for looking into this. Let me know if you need more details on my setup to try to replicate the fault condition on your end.

Disclaimer:  Al from Wakespeed. Sorry to hear you are having issues, let me look into this some.  Should of course be transparent, as the source code is common.   But let me set up ...

We havent done any testing with the Pro yet so I am going to include Al from Wakespeed in this thread and hopefully he will have some insight. @Al Thomason 

I cannot get firmware from this download link: https://rec-bms-na.com/rec-bms-releases-new-active-bms-firmware-2-9-4/   What is the right location to get the latest firmware?

Greetings All, I have 4P4S 920ah 12v LiFePo bank with a REC Active BMS, Cerbo GX, 1200w of solar with 4 MPPTs, MultiPlus-II and a WS500/Balmar XT-250. I have had my system working on my boat for o...

after a lot of head-scratching I finally got this:

@Rick a couple of reboots and CAN details are all back working on the Cerbo screen, something obviously got out of whack!   appreciate your help

ok, good.  For the CAN network, its likely a baudrate setup issue.  I am going to send you a link to our new REC-Active Quick Start manual via email that steps you through it.

@Rick yep that fixed seeing it in the WiFi module (I clearly forgot about setting that when I originally installed it 😊😃 Still can't see it on the CAN network though 😢

That may not be bad advice.  The Zeus was designed to support a dual alternator setup and as long as you have matching alternators, you should be able to get some good output from this configu...

When you Factory reset the wifi module you lost the comms settings.  The Active BMS address is 2.  Here is a link to some tutorials that should help.  It gets set on the "Firmware" p...

My Abms has been working flawlessly but I got a new router and needed to reset the WiFi so I pressed the reset button on the rec WiFi for 20 seconds and now I can't see the abms. The ABMS green le...

After a lengthy process and a few hiccups we have changed the house bank batteries on our boat to Lithium Batteries. (2 x 12V 330Ah Victron Lithium in parallel) with alternator charging through an ...

Did anyone get anywhere with this?  Latest I've seen is REC ABMS to Cerbo BMS-Can port. WS500 to Cerbo Ve.Can port. I'm running an older Cerbo GX (not MK2) on 3.5.0 with a WS500PRO on 2.6.0....

@Bill C. First of all, thank you for sharing your project!I have the REC ABMS 4S as yours and I want to add the Bluesea bi-stable contactor ML-RBS 7700 driven by the ABMS Main internal relay, as yo...

FWIW, the later revision of the wiring diagram document, "REC-Series-Master-2Q-Slaves-Wiring-1-0-1-6.pdf" still has the pin numbering error on page 4 at the DB9 connector. Again, pin 6 is at the b...

@Bo  I leave the USB cable connected starting the engine without any problem. The engine start is a separate battery from the House AGM and the Storage LFP banks. Bill

@Bill I am going to do the same. Do you have anything connected to the cable when you start up the engine or do you unplug it?

Hey Lure, if you could share a bit of your code or a github link to help others get started, that would be awesome!!

Nice, JSON interface for http://x.x.x.x/cell and http://x.x.x.x/get_data are really useful for quickly inspecting configuration and status.

Guys, thanks for all of the help. I have been moving my settings to match the recommended values from this thread. I have one question regarding float voltages.  While away from my boat, I ha...

I have send the updat to Rick, so he will forward it to you, there is no attacment ikon here.  

@tine  Here is the serial number on my Master box: 9-M-1067. This is a system with two slaves, to be used with an SMA Sunny Island 6048-US-10 inverter (this inverter is a master with 3 slave...

12 + 11 What is the Master BMS serial? I have to send you the dedicated firmware update.  

@Bill Haven't sent the file to AI yet. My plan was to test the latest firmware from REC and Wakespeed to see if it solved any problems. If you send data, it would be nice if you could share your fi...

Was the data file sent over to Al at Wakespeed. I'm have similar issues. 

@Trond I have same set up except I am a REC Q BMS.  Two shunts. The one on th3 battery is a VE Smart Shunr on the battery negative and a dumb shunt on the positive Alt wire. Has anyone found a...

I'm in the process of working on this same wiring for one 9M master and two 2Q slaves.  While I did purchase the necessary cables, I still will need to insert the wire terminals into the 14-p...

@tine   My new system has 23 cells (LTO) at ~2.3V per cell. I've received my new system (9-M master + two 2Q slaves), and am wondering what is the best way to divide the cells among the two ...

@tine In my system the distance from the plane where I'd like to run the BMS cell wires, to the surface of the inter-cell bus bar, is about 45mm. Is that close enough to cause an EMI problem? The i...

@Bill I am hoping it will be first quarter 2025.

Ok thanks, IOS user so will need to revert to the batch file.

@Rick " You also have a large hysteris but that will only allow it to work under large imbalance condtions." Because of the need to use 4/0 wires on cell #6 to allow me to "fold" the batteries to ...

The power line that continues from sub-pack to sub-pack from batt- to bat+

@tine Thank you tine; that is good to know. When you say "power line", do you refer to any nearby 120/240-volt AC line? Or do you refer to any nearby high-current DC power cable? Also thank you f...