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...

@Michael There is an "feature inn" cable on the WS500 for this, its all in the manual. "The Feature-in port allows a wide range of optional capabilities in the WS500 to be selected in real time. T...

It would be nice that be able to set the charge rate like you can do with the Multiplus through the DVCC in the settings of the Cerbo I have a 180A alternator which is charging a 1120Ah LiFePO4 bat...

Looks like Victron has made some changes on their site.  Here's the new link. https://www.victronenergy.com/media/pg/Venus_GX/en/connecting-supported-non-victron-products/wakespeed-ws500-alte...

Tanks for info and how to check. I opend the box and found the ISO1050 at (U5).

I've got two battery banks each is a Nissan Leaf Gen1 repurposed battery. They been up and running for several years now. Recently I add the wifi module that allows me access to a lot more informat...

The Cerbo does not provide battery settings functionality for the BMS.  You can set up alarms, logs and DVCC functionality though

Good Day, This implementation of RS485 appears to be unique in that +VCC / GND is required. Furthermore, when measuring +VCC 5v (pin6) to GND (pin 2) with a DMM this voltage is not as I expected, ...

Does the ABMS show correct current (0 A) when all is disconnected? IS the shunt connected directly to cell 1- pin or via fuse or ON/OFF power switch? What avout the cable from the ABMS to the shunt...

You can open the ABMS and see if there is a ISO1050  (U5) mounted on the PCB. It should be, since we started to put them as a standard from 1-A-0470 onwards.  

I think that is a really good solution. 

If your batteries have No CAN, it is usefull to connect the 2 shunt wires to the shunt at the batteries. But without shunt wire the system will work also. It dont explain, why the system dont cha...

@Michael Thanks.  I switched over to the andriod app and it did the firmware update and configuration download / compare like a charm.  Definitely easier and faster than the Widnows App.