It could be a couple of things.   First, check the charge parameter of the alternator.  It may have a very conservative profile.  The Wakespeed site has quite a few preconfigured profile...

I\'ve installed a WS500 about 6 months ago and it\'s working fine at first sight. When giving more attention to the data, I noticed that the alternator only goes to about 27V and never reaches the ...

Adam makes a good point about capacity, and you would need some very large wires off of those alternators, very good belt drives, and will need to be careful about side loading on the crank bearing...

You have nearly 29 kW of maximum power generation and a just over 12 kWh of LFP. That is not well matched, particularly if you are trying to charge at 0.5C, or 6 kW. Also, 14 cells in a 2S2P lay...

Dear Rick, I am planning to install wakespeed 500\'s on a yacht with twin engines. One engine with 2x 400 amps 24V alternators, the other just one 400 Amps 24V alternator All three charge ...

I think I figured it out. I\'m bench testing everything in my garage with the inverter plugged into a 15A 120v circuit. I\'ve limited the MP3k to 13A input. From what I read last night after more s...

Not sure what\'s causing  your issue -- I have a similar hardware setup  with a MP3K and am able to charge at the full 120A capacity reliably. However, I am using lower voltages for  bulk and float...

Interesting start to my Multiplus 3K with the ABMS. Followed the instructions on page 20 of the ABMS/Victron/Wakespeed manual to get the BMS talking and managing the MP3K via CANBus. I did updat...

I\'m running the same basic configuration  you are (16 eve 280 cells), and have the same  question about voltage settings for these cells. I reduced the max cell voltage for now to reduce wear on t...

I just got the Active BMS working. My battery pack is 16 EVE 280Ah cells connected in a 4P4S configuration. Chemistry: I the Chemistry settings list is relatively short. Is Winston the best e...

This was originally a reply to another post. Relay DCH is meant to be connected to all Victron loads and charge devices. (Non Victron loads can be added here in a single contactor configuration)...

It looks like the BMS is pulling back before your BMS starts to balance. You can try to enable balancing at a slightly lower value. We are putting together a bit of an instructional video on ...

I\'m new to REC but just got my ACTIVE 12V bms. I had a pack that was fairly balanced before hand, but was configured as 24v. I reconfigured to 12v 4s2p pack just to play around with the BMS and th...

Pete, the way the \"Victron\" version of the ABMS works is like this. Relay DCH is meant to be connected to all Victron loads and charge devices. (Non Victron loads can be added here in a single...

Just realized, the Active BMS has fuses that are user replaceable but the Q series does not.

it sounds like at some point the cells were wired up incorrectly and the circuitry damaged.  The BMS contains very sensitive ADCs that measure accurately to several decimal points and do not like t...

Yes, positive side of the last battery is connected also to the last terminal on the connector, like shown on the figure.  

Do you have the jumper installed from the last cell used to the last cell possible? see diagram excerpt from manual below

Hello I\'m having trouble with a Q BMS. It is being used in a lab setup with a varying number of battery cells. When connected and configured to 16 cells the cell measurements works fine, wit...

On the network diagram please note that Terminators are NOT required on the VE.bus network. Updated sketch attached Thanks to Ben for catching this one!   Note:  First revision of ...

We are currently creating several shapes libraries for a free online design tool called  diagrams.net to help with the system design process.  Its not ready for release yet but I quickly put togeth...

Hello Rick - I have a related question. The Multiplus is an inverter/charger so same conductors are used.  To control charge enable and discharge enable, Victron has separate digital inputs (all Vi...

Hi Salvey,  I thought it best to reply inline, so please see my replies in blue.   Rick - thanks for your prompt response.  What you have described appears to integrate multiple charge s...

One more question:  Is the \"OGSS Demo\" the charge information that I would see from the Wakespeed, on the Cerbo GX Touch display? Thanks.

Rick - thanks for your prompt response.  What you have described appears to integrate multiple charge sources with an LFP bank. Questions:  I prefer not to have three different interfaces f...

Hi Salvey, The REC BMS functionally acts as a Master DC source on the CANBus network via the Cerbo, and becomes part of the Victron Ecosystem.  You just need to set a few parameters in your Cerb...

Hi Rick, I am configuring a similar system.  I have a 12V @ 560AH LFP house battery bank.  My goal is to get a REC-Active (12V) BMS to control a WS500, Multiplus II inverter/charger and SmartSolar ...

I am setting up a similar system with an REC Active (12V) BMS and Victron Multiplus II Inverter and Wakespeed 500 regulator.  It is critical that either charging system disconnect if CAN fails.  I\...

Thanks Rick Maybe I just dont understand how this works - are there not two Relays and two Optocouplers? RE1L and OP2L being Relay-1 (pin 1,2&13) and OptoCoupler-2 (pin 16&17) respect...

not sure what manual you have but here is the link to the current ABMS manual for use with Victron. https://rec-bms-na.com/download/8/rec-active-bms/340/usermanual_abms_victron.pdf It looks l...

Hi Maybe I\'m just missing something, but going through the values in my Active BMS, I don\'t see a complete instruction set in the REC documentation. I\'m missing the commands to query or se...

Ha! One DOA factory original USB cable. I just got my new OffGrid cable, connected it and lo and behold - off to the races!  

Hey Pete,  it is starting to sound like you have a bad 485 cable.  I would grab a new one at this point.  We sell them as part of the PC Windows software or you can go back to where you got yours o...

I am quite convinced that the cable is dead. There\'s no indication on three different machines when plugging it in. I\'ll see how quick I can get one shipped. Again, thanks for the help! &nb...

If the rs485 is working,  then the REC is all ok. Try another usb cable. And as mention before, first have the comport showing corretly in device manager.  No reason to start software before ...

Nothing - no beep, no change in the device manager. Yes the BMS is on - I\'ve tried every permutation with it on or off when I plug in the USB. To confirm that the 485 works, I connected the ...

I added my previous post, please read that again, maybe some tips help you. Restart windows. Plug in usb again, do you hear any bleep or nothing? Not any change in device manager?   ...

Ben, the error is on the manually created COM port. There is no difference to the view if I plug in the USB or not. And no, the COM port doesn\'t disappear when I unplug the USB. The two vers...

From device manager screenshot is a fault at com 7. This is a windows comport fault, you need to solve this.   If you disconnect the REC device, does this com 7 disappear? Or is th...

There is a difference though now when I run the BMS software. I don\'t get error 1073807343 anymore, but rather this new 7346 message. End result is still the same - No COM port to select in the...