Sorry, I just wanted to make you guys aware but the 2.9.4 manual has a big error. DCH F goes to the negative line below (which is correct). I spent my whole Sunday trying to understand where the g...

As a followup, we are introducing a new Wifi-LCD module that will support multiple BMS's.  Keep an eye out for an annoucement, video tutorials and details soon.  This product will help sh...

Rick,Thanks. 

yes, i recently had it happen on a boat, and I was able to troubleshoot it by wiggling wires and connections until it registered correctly again.

@Geoff Hey Geof, the Quickstart manual link will be in the REC Tech info email that is sent right after your REC order was confirmed. And yes, if you have an integrated system a single saferty con...

@Bill C. I have found my best help at Gemini, ChatGPT, and Grok.  Too bad they don't put out manuals any more, or at least one you can find!

Rick,Thanks for the reply. It sounds like you recommend a single contactor/relay?Regarding precharge: I understand that when the contactor switches you want the pre-charge to ensure you don't get a...

Hey Geof, Some good questions.  1) the Rec 2Q has an adjustable precharge circuit built into it and its only used on the load thst includes your inverter as it is an inductive load, usually ...

I'm looking at at least two contactors (actually EGIS relays), one for the charge bus and one for the discharge bus. My current design (which I'm reducing as we are changing from 12V to 24V) has 2 ...

Thank Rick. Really appreciate, put me on some track. I found something different (my WS500 is from 2021): Positive red - Pin 1Field blue - Pin 3Negative black - Pin 5Alt Temp Sensor black - Pins 2...

Anthoney, I missed this one.  Can you include some pics of your settings and firmware revision?  Is this coming from your Victron cerbo?

I was able to dig this up.  Hope it helps. 23-Pin Ampseal Connector Pinout [1] Pin # [1, 2, 3, 4, 5] Wire Color Function Primary Connection 1 Brown Ignition / Enable Ign...

I accidently cut the negative and the two alternator temp sensor wires on my harness (WS500 P). All three are black. How can I identify which is which? Given Wakespeed does not apriori provide pin...

Try fixing using the SD card direct method.  Details are on this post.   https://ogm-energy.com/community/ogm-user-forum/topic/177240/rec-wifi-module-locked-up-how-to-fix#post-35674...

@Rick both lights are on solid 😭

What is the LED status?  If both are on solid, it is stuck in startup mode. IF not, you may have forgotten to set the RS485 addresses to zero and two, they default to zero and one. Sometimes ...

i just tried update the firmware at the bottom of the firmware page to what i thought was the ABMS from 2.9.0.2 to 2,97 However, I can now no longer access the wifi module, i have tried a 20-secon...

Hi, I was after the same thing and after a few emails exchanges with REC engineers below are my notes regarding the RE1T and OP2T commands that can be used to code a task. Once the task has been c...

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My Q2 has been running just over a year flawlessly. Now all of a sudden my pack will be at 80%-ish in the morning and when everything gets going it starts on adsorption and will stay there until I ...

Buying a budget tablet can feel like a bargain for a dedicated marine chart plotter or Wakespeed monitor, but there is a hidden cost built into the hardware. Based on your device details (G10_US), ...

Is there any documentation for the commands that are used in the task settings for the ABMS?  Currently you have to bye a WiFi module to use the task settings to run the auxillary outputs.&nbs...

Hi all, I am installing an ARCO Zeus A225s smart alternator regulator on a sailing vessel. The battery bank is a 12V LiFePO4 pack (3P4S, 840Ah, EVE LF280K cells) managed by a REC Active BMS v2.94....

Exporting profile settings as plain text could really help fix problems fast - similar to streamlining how custom bucket hats are designed. When details are easy to read, everything moves more quic...

Hi All, I am done with physical install of by LFP build - ABMS - 960Ah. It's time to get the configuaration in order. 1 ) ABMS Software version 2.96, HW 2.1. 3) Cerbo GX v3.67, Multiplus II 23/3...

Since I haven't done anything to the system other than go sailing today, would they most likely issue be corrosion?  I'm assuming to solve this. I would just need to go through the system loo...

When you have a large error its usually one of three issues. You made an adjustment to the shunt zero offset parameter A shunt wire was mistakenly touched to a battery cell voltage and it burned ...

My REC Active BMS is reflecting 240-250A of charging into my LiFePo battery system, however there presently no sources of charging active in my system (no shore power and my engine is off). My Vict...

@Kevin voltage sense not connected it will not work. This is not a fault in the firmware. As my understanding and chats with designer from WS500: It is by design, reason, to only use the CAN vol...

Is the baudrate set correctly? In the app, manual communication type: CANS? What value comes back? Should be: 2  

So it turns out the problem is that the Battery Sense wire (Red with Yellow Stripe) was not connected.  If I connected this to the battery, the CAN communications work.  I didn't have it ...

I've done some more testing.  I've reset the WS-500 to factory defaults where it is set to a simple starter battery and no BMS.  It still reports the same error " BMS connection via CAN"....

Hey Kevin, I thought that Wakespeed had this fixed with version 2.6.1.  I am going to include both Tine from REC and Al from WS to see if they have any insight but you may need to put in a su...

I have a WS-500 Pro with the latest version (2.6.1) of firmware as well as a ABMS with the latest version (2.9.7) of firmware.  I'm trying to get the CAN communications working between the two...

We have created a custom AI agent to help with REC BMS setup, troubleshooting and configuration. As of January 2026 it's still in Beta, but hopefully it helps. Feel free to let us know if you hav...

The Master has been updated for 2026: supports multiple configurations without the need for a firmware update supports custom Tasks using the wifi module improved connectors to match the new 2...

I am not sure about the top two, but as I recall, the bottom are your TTL Bootload pins.  By way of this reply I am including Al from Dragonfly.  I am sure he can help. @Al 

By chance, are RX and TX available on the board? Possibly J2, the two pads labeled TERM? Or P1? Before I get me scope out, I was hoping that someone knew. Thanks! Ezra 

Upgrading energy systems can be tricky, especially when switching to lithium solutions like the Arco Zeus. This forum discussion dives into practical tips, user experiences, and performance conside...

Hey Ben, thanks for the reply. Here is a screenshot of my REC home page. This is a 24V start battery, so 2x13.36=26.72. My SOCH = 0.05. Cell difference is typically 3-7mV. I have about 0.3A of drai...