Ok, I have the parts, does this look correct.  What about termination?  

There is a REC & Victron guide, somewhere.   Does the Cerbo GX see the BMS and it\'s various data outputs? DVCC must be enabled, as well.

David, I may be mistaken on how the SoC works with regards to CHAC and DCHC and am requesting clarification from head office. When I hear back I will update this post.

Thanks. Do you think you\'ll add status of contactors to the WiFi interface? Seems overkill to have separate indicators when I just trying to see what the BMS is up to.    

Thank you Rick.

Thanks Adam. I have the Cerbo as well, but it doesn\'t seem to work in the manner you describe. I\'ll have to go back and check my setup.   Do you have any guides on how to setup the REC...

Quote from Jamie Reece on March 20, 2022, 9:07 pm Recently, while finalizing the install of our Victron MP3k Inverter/Charger I noticed the BMS was disconnecting the charge bus Victron as the batt...

If you want to upgrade or replace your SD card on your REC BMS Wi-Fi module it is quite easy but there is a bit of a trick to it Step 1)  Remove the dab of silicone as shown Step 2)  Using a ...

Thank you Rick, very helpful. I\'ll adjust that charge coefficient parameter now, 60% charge efficiency is definitely too low for a lifepo4 system.   I did adjust the top balancing setti...

Your big variable here is your alternator.  They can not be expected to act instantaneously like a battery charger, or even charge at a specific current, especially as you get near the bottom of th...

sure, extending your On/off switch should not be an issue. For your DB9, my preferred option is to use black tape, but you can get M4 x 6 or 7mm nuts as well. I found these on the walmart sit...

The PC interface is very basic and only used for configuration and startup.  The new Wifi module has more features and will continue to be enhanced. If you require visual indication, maybe add a...

By running under the manufacturers rating you potentially creating some issues.  The default top balancing on a REC BMS starts at 3.5V so you will never start to top balance, unless you have change...

I\'m getting ready to install the final pieces of my system which includes REC Active BMS with WS500 regulating a Balmar XT-250 alternator directly charging my 840ah of LiFePo. My starter and thrus...

On/Off Switch - my BMS location won\'t allow a close location of the on/off switch included in the harness. Are there any concerns with splicing in an extension of wiring and locating the switch ab...

I\'ve got the active BMS and the PC connection which I\'ve found helpful for seeing cell balancing, and setting things up. However, I\'m a bit surprised I\'m not able to see more of what\'s going o...

Rick, thanks  so  much for your reply  and suggestions. First, grab a DC multi-meter and compare your BMS values vs the meter. Ok, values are close as far as voltage. Current moves around a lot, ...

It was starting to sound like that was one of the issues. We sell the software and cable at our online store . You may also want to consider grabbing a replacement BMS only.  Its not too expe...

So, it turns out my RS-485 to USB cable is bad...  for starters.

Tried reloading drivers on my laptop, no difference.

Yes, I have removed the USB cable and tried both ports.  I have rebooted multiple times.  I even uninstalled the REC software and reinstalled it.  I would think if it was a driver problem, it would...

I wonder if when you powered off your BMS while communicating if that caused a driver problem or something. I assume you have removed your USB cable and rebooted, then re-installed your cable du...

Here is a screenshot I emailed your tech yesterday of my cell voltages.  I didn\'t do anything after being connected except shut off the beeping BMS.  When I turned it back on, I was unable to get ...

I saw someone else on here had a similar problem, and they toggled off the correct settings and back and it worked, so I was trying that.

Sorry, I hit the screenshot while trying other combos.  Here it is.  Still no joy...

Control address needs to be zero.  You have it set to 1

I am using 2 and 0.  Here is a screenshot of my settings.  I have done this many times, so not new at connecting.  

Rick, I bought my REC from them before you guys were selling them.  This has been in service for a while.  I am desperate for help, so I was searching and found your forum.  If you can\'t help m...

Bret, I cant find your order in our system so I dont know the details of what your have. Did you try disconnecting the MPPT to see if the error goes away? Are you setting your addresses to 0 ...

I had to shut down my system to add an MPPT.  Turned off the REC, and opened my main disconnect.  Went to start it up, and I got an error 10. I have checked all connections and fuses, including ...

it for the Sunny Island. am i make the connection right?

The blue RJ45 looks like a terminator for your Victron end of the network. For your cable you can rewire the RJ45 or it might be easier to open up the DB9 connector and resolder your connections...

i cuted the wire and rearrange the order. am i do it right? what is this extra connector for? looks like pin 1 and 2 is connected together. do i need both for my SI?

Hi David, There are many of factors that are used to calculate your SoC, so we need to look at more than just the current sensor. First, grab a DC multi-meter and compare your BMS values vs t...

Rick, thanks for this post. I purchased  the \"REC Current Sensor Shunt 1000A\" and seem to have a slight  misconfiguration of settings as the system is pessimistic enough that it resets SOC to 100...

We have now arranged to have the REC BMS to Sunny CANBus cables manufactured and stock should start arriving mid April 2022 https://www.offgridsoftwaresolutions.com/product/rec-sunny-canbus-cabl...

I will see what I can do.  Thanks

From what I could find I would suggest you use a REC to Victron cable and then adapt the RJ45 end for the Sunny pinout. link to cable:    https://www.offgridsoftwaresolutions.com/product/rec-vic...

Which cable do I use?

The diagram on page 7 is correct.  All wire numbering is correct on both pages but on page 8 the diagram is also correct if you are looking at it from the \"cable out\" side (when plugged in this i...