@W the profit from DVCC is that when cells are almost full and cells have a slight imbalance, the charger start adjusting the charge to avoid one cell goes to high.  Much better for the cells...

Just FYI for whoever may stumble across this post, I removed the shunt, reconfigured the wakespeed to not use DVCC, and disconnected the wakespeed sense wires and everything has returned to normal....

@Trond Thanks, Trond. I appreciate it. I do have an agm battery in the system to absorb voltage in case of a battery disconnect to protect the alternator. It is joined with the alternator positive ...

The alternator is charging 3500W and the WS500 is seeing this correctly, and now positive reading so the shunt is also the correct direction. The battery is still showing 0,3A so the current from ...

@W To move a shunt from negative to positive will not solve the problem you see.  The WS500 only monitors the shunt, it does not matter or that shunt is in negative or positive.  IF the s...

As far as the resources go, I'll take another look at the links, but as far as I know, there's nothing in there specifically about the Rec and how it plays with the Wakespeed with DVCC turned on. I...

@Ben Nope, the new alternator shunt is on the alternator positive cable. I've also tried it on the alternator negative without success. The battery positive goes to a 400 amp T-fuse block, then to...

Here are some links, which you maybe have missed on the Wakespeed website. https://www.wakespeed.com/learn/ https://www.wakespeed.com/wp-content/uploads/Wakespeed-Victron-Cerbo-GX-Guide_4.29.24-1...

@W the shunt from the ws500, looks like installed in the main positive from the battery!!   The shunt need to be installed in the positive from alternator. (As in manual is discribed) In th...

Just changed the alternator shunt to the negative wire from the alternator and it's still listing it as a dc load and alternator power. The original shunt with the Rec sense wires is still in place...

Yes, it was showing the alternator with negative current as I was playing with the setting on the app trying to figure out the doubling of the dc power. Even when I correct the alternator setting p...

There is a few errors here. First, your shunt for the alternator is reversed. Swap the two wires for current sense, or reverse it in the setting. Second, how can the alternator charge 3500W and n...

I didn't test the new Gui myself. Does the app show positive amps? Are shunt wires reversed? If so can be changed in the app setting also.

It does have an alternator widget in the new GUI. I've switched the + and - sense wires on both the alternator and battery shunt without any changes. @Ben    

@W can you post screenshot.   Probably what you see is that there is no seperated widget for alternator.   The DC load widget is calculated, and will show a negative value.   

1. 120 ohm resister has been placed on the db9 connector on the REC harness. 2. REC BMS has been updated to MODE 2 with Ben's instructions. 3. Additional 500 amp shunt has been placed on the + si...

Wow, Ben. This is great information and I have a db9 120 ohm resister ordered from Amazon coming tomorrow. I will also attempt to change the mode in the manual communication under the firmware tab....

1. Make a proper CaNbus network.   This means on both sides from network a  resistor.You installed one a the ws500, but you didn't write or you install on the REC BMS side.  Usu...

If you search my other posts, you'll see I have a camper van with a 1120 amp hour lipo4 battery system that is managed by the Rec BMS and charged via a 280x Nations alternator or Multiplus ii 3000w...

Hi, congratulations on your new boat! To use the Victron smart shunt, you need to have the shunt wires connected across the shunt and treat it as a manual shunt.  You can not rely on the CANB...

@Mark suggestion also have the WiFi unit with newest firmware. Sometimes good to start with a new formatted SD card in the WiFi unit.    The shunt value is just a setting, under "setti...

some how the error has cleared and I have now manually set the SOC to the shunt reading.    I now need to understand how I can get the Victron smart shunt to be seen.  Currently the...

thank you.  i have update to |SW 2.94 HW2.1 i can see the BM|S and I have Error "Internal Memory Problems Detected" The SD card is hardly used so there must be another memory? I have a Victr...

@Gerard a little late this answer The relay in your link, use lesser as 100uAmp, in on position, and a few mAmp at  the control wire. The amps for switching the relay, 4-7amp, comes from the...

There are 2 version of firmware. See the text doc, when you downloaded the new firmware. https://rec-bms-na.com/ You need xx.x.1 or XX.x.2 depend on your installation, see same worddoc.   ...

Hello,   I have a REC-BMS attached to a Winston Bty with a Victron set up.  The system came with a new to me yacht. I cannot get the BMS to function. I have the wifi module and having ...

@Rick Thanks for your recomendations, that works. Take a look at my logging is this fairly normal for the differnt resistence, I noticed it can change alot on differnt days      ...

That e is the number of digits to offset the decimal, so the e-1 means your RAZL is 0.25 :) I think you mean you have a 2P16S system with 2 cells first paralleled than those 16 put in series to gi...

Regarding the CELL SETTINGS INSTRUCTIONS if I type RAZL? I get a 2.50000e-1, that means what? Regarding the Parallel strings box on the settings, I have a 16S2P Bank (32 batteries), Should that b...

@Rick Thanks

@Ben is this PDF available? I do not see an enclosures in this thread. Is this because the forum was moved to a new platform? I am working through this thread to understand what is happening, but i...

It looks like you have a pretty big cell imbalance problem.  I see that your balancing ends at 3.58 but you stop charging at 3.53, which is part of the issue. If it were me I would adjust my ...

I'm using my REC Q BMS with 560 Ah at 48 volts, 32 LiFePO4 battery's total. 100 amp Inverters. 2, 100 amp charge controllers, I've been getting this Cell Voltage differs more than set error. If any...

Thanks for sharing Jonny and a shoutout to Trond @Trond Røsvik  The only time that should happen is if your USB is connected, as the WS500 thinks the ignition is turned on, which start...

On the more recent version of the precharge module there is a board mounted fuse that might be the problem.  It will be black or grey and about  1.2cm (1/2")square and may have a glob of ...

@Rick-admin  

After replacing my alternator (see recent posts) and updating my firmware to the latest 2 contactor version, my system was working fine. However, My system stopped charging via the alternator and s...

Problem solved!.Have now solved most of the problems with regulation with good help from my supplier Trond at Farco. Pulsating regulation occurred due to NMEA conflicts, which I suspected in the fi...

@Sturla I was able to reload the previous firmware update throught the cable and software. Tine got back to me and said I should have been able to re-install with the wifi module, but I could never...