Hi Hank, Sorry for the delayed reply. Are you still having issues? I have a few systems setup SMA and REC products.   What is your incoming source of electrons? Are you DC coupled with a ch...

If you are using a REC or Victron BMS your WS500 should be able to pick up the current on the VE.CAN port.  Not sure about the Smart shunt, but I would expect so too. I  do not like rely...

This is for anyone else who may have trouble getting the new 2Q to communicate with Victron. Assuming you've wired it all correctly AND have the adapter that connects to a Cerbo or other Victr...

I currently have a marine twin engine application with a Victron Smart Shunt connected to a Victron Cerbo GX for house battery monitoring.  I just purchased two Wakespeed 500 regulators to con...

Is there a method to determine what the REC Q BMS has requested of the Sunny Island 5048U?

Hey Fred, we don't currently have an SMA demo set up here.  Do you have any ideas for this gentleman? Thanks, Rick @Fred Egelston 

I installed the REC-BMS some time ago. Recently, I wanted to add two additional battery strings, necessitating a change in configuration to a master with three slaves from a single REC Q BMS. This ...

Closing the loop on this thread .... many thanks Ben.  The problem was finally diagnosed by a tech in Maryland.  When the solar power system was installed, the the WS500 was reconnected t...

The EVE cells are proving to be a good cell and so long as they are well matched you shouldnt have any problems with a 3P4S configuration.

The GX is not the device that calculated the "remaining time". In setup with a Victron shunt, or smart shunt this info comes from the Victron shunt. I think REC dont calculated this, and sent thi...

@Rick Hi thanks for your reply, I am currently building a 3P4S setup with EVE 304ah cells. Just checking to make sure the Rec Active BMS is fine with 3 cells in parallel as well? Thanks!

Thank you Rick, that helped clear things up for me. The system is now running fine.

Good question.  This is just a milliamp input toggling a bit on the internal chip so a 0.5-1.5A fuse should be fine under most conditions.

1)  In a 2P4S configuration, the 2P means that you have 2 cells wired + to + and - to -, which in effect creates one large 560Ah cell for the BMS to monitor and balance.  This means you o...

Matt, the Tyco EV200 series relay incorporates an economizer circuit which allows the relay to pull in hard and fast with a high current, then pull back to a few milliamps to hold it in.  We r...

 What is the load at +12v required to activate the "Feature In Port". I don't see anything about this in any of the manuals,  just >8.5 vdc.  I have a twisted pair 24ga wire (cat...

Hello,   I have built my first setup which I want to use on my livaboard boat.  2P4S from EVE 280Ah A Grade REC ABMS Victron compatible REC Wifi Module 2x Kilovac EV200AAANA contact...

I know, that when I will install the inverter I need the precharge module. I just wanted to be sure I do not need it right now. Contactors are 500A Kilovac EV200AAANA.

 But a 1000W inverter can have an inrush current!!   Maybe not high enough to damage the contacts from your contactor. All depend which contactor you use. If you have a 500amp contac...

@Mattahh you have a WIFI module now?   relay 1 the cable is labeled as CH (charge) The Main relay cable is labeled as DCH, (discharge) sometimes called relay2    

Ben, thank you for your input. In my setup, charge sources are solar and a DCDC charger. The DCDC charger is fed by a non Victron AC shore power charger which I cannot configure for Lithium, and w...

@Miro I agree with you that a seperated load and charge bus gives extra safety.  If the charging part from the multi, or any datacable fails, AND there is a cell imbalance, one the cell can ...

I have now ordered the wifi module. I had seen your links for the manual and wiring. I can configure relay 2 for UV, and then connect my load bus there. However, I wonder about the parameters: In t...

I am hoping to find someone with the REC ABMS and CerboGX connected via CAN-bus showing the calculation and data for "Remaining Time" given the capacity of their battery bank and real-time amp draw...

Thank you for the quick answer. That helps for understanding.  I think, having seperate relays is a plus for safety. If the CAN fails, I can still use electricity, which is important on a boa...

In older versions you had to have a special software build for a 2 relay system but now with vesion 2.9 firmware , when you have the wifi module you can confgiure your spare relay and opto ouputs t...

I want to wire and use my REC ABMS, using a seperate charge and discharge contactor. I went for the Victron compatible version, have a Cerbo GX. But now I have trouble understanding how to do it, l...

I've got a Tyco 500amp contactor and that takes power to stay closed. I was going to look into bi stable latching relay to reduce standby power when I came across the 7718. This appears to be a sta...

In the task settings, I'm only seeing relay 1 and Opto 2: Is this new feature only available with manual commands? I'm on 2.90-1 of ABMS and 1.61 on hardware 1.2 of the wifi module. Thanks!

from Phil, maye add low battery temp control, with outdoor temp and control relay

Initial feature requests: (Keep in mind that these are limited to what is possible for an LCD to do without modifying the BMS source code) quick start mode store default profiles better trend...

Here is a quick pic of a 2.8 and 3.5" screen with a couple of 3D printed enclosures for desk and wall mount. Although a bit more expensive the 320x480 capactive touch screen presents much better. ...

This forum has been started with the intention of having a small group of REC power users provide input and alpha/beta testing of a new ESP32 based LCD TFT capacitive touchscreen display and config...

Stopped the LED flashing when the brown is disconnected? If LED stopped flashing, then IAm afraid the unit is broken. How much amps is the fuse in wire 6?     Best to remove 2 fuse f...

Update - Sorted.  Found a short! Finalizing the install on a 2 engine layout. STBD good, went to port engine and noticed the alternator was warm.  Tested and found the #7 wire (pos excit...

@Trond  Thanks Trond, your setup sounds very simpler to ours, apart from the the fact that you are running dual alternators, nice. I have kept the the original alternator and are using this ...

@Michael We have the 4JH4 54 HK motor with dual 200A alternators. Having one on each side of the motor helps with the side-load issues. Been working great for many years now but we do not use the...

@Trond  Thanks Trond What engine are you using to drive the 400A alternator???? My alternator is water cooled so is happy sitting at 100% more or less full time, and it's running at about 3...

I have the same setup in my boat. 60% field max at normal drive (about 230A). Then 90% when "I need to charge quick mode" (about 400A). Could probably change it to 40%/90%.  

@Trond  Thank you Trond I had totally forgotten about this "Feature-in" cable I will certainly be reading up on this, it will probably be all I need. I will have a play the next time I am o...