Victron GX now sends NMEA 2000

It’s no secret that I love Victron’s control ecosystem. On my last three boats, I’ve had Victron bits that have helped provide visibility into the power system. Earlier this year, I finished the conversion on Rendezvous to a mostly-Victron system which I wrote about below.

One of the glaring holes in Victron’s communication has been with NMEA 2000. In particular, their GX-series of devices has had very limited capabilities – in fact, they have only been able to receive information from the NMEA 2000 network, and only tank information. It was nice to be able to see tank levels on their devices, like the Color Control GX, but most people with NMEA 2000 tank level stuff already have ways of displaying that.

There were various other NMEA 2000 interfaces you could get from Victron, but those were specifically for controlling devices, and as a side effect, you got some info from those devices on NMEA 2000. I had the VE.Direct to NMEA 2000 interface, commonly used between a battery meter or solar charge controller, and I also had the VE.Bus to NMEA 2000 interface, used between an inverter/charger and other devices. However, using these had drawbacks – some features weren’t available unless you used native Victron busses.

Enabling NMEA 2000

Victron VE.Can to NMEA 2000 cable

You’ll need to be running v2.40 or later of Victron’s GX software – they released v2.41 recently that addressed some initial bugs in the NMEA 2000 support. I’m using a Color Control GX for these examples, but it also works for other GX products like the Venus, etc.  You will also need a VE.Can to NMEA 2000 cable, available through Victron resellers for about $95 US. I purchase my Victron stuff from PKYS.

When you install the VE.Can cable, you’ll need to make sure your VE.Can network has a terminator (should have been provided with the GX product you have) and if you have an existing, powered NMEA 2000 network, remove the fuse from the cable so you don’t create a short circuit.

Once you have the cable connected, in the Settings -> Services menu you will find an option for CAN-bus.

Once inside the CAN-bus menu, using the default profile, and turning the “Send data to VE.Can” on should get traffic flowing to your NMEA 2000 network.

Examining the NMEA 2000 traffic

Maretron N2Kanalyzer showing Victron devices

I have the following Victron devices:

I also have several MPPT solar controllers but they aren’t installed yet. These devices provide all of their wealth of data to the Color Control GX, and it now is sending out data to my NMEA 2000 network.  You can see four devices listed above – the MultiPlus is listed twice.

The Color Control GX shows up as a device but doesn’t send any electrical PGNs as it is just the device facilitating the communication for the other devices.

Battery Data

The BMV-712 is sending two useful PGNs – 127506 and 127508.

PGN 127506 – DC Detailed Status includes the state of charge (SOC) and time remaining. The other values do not appear to change or have data in them.

I have two batteries being monitored by my BMV-712 – my house bank is connected to the shunt and is considered battery instance 0 above, and the generator battery is connected to the second monitoring point only for voltage and shows up as instance 1.

I now have battery voltage, battery current, state of charge and time remaining for my house bank, battery voltage for my generator battery all on the NMEA 2000 network. This was the primary info I wanted so that when I was elsewhere on the boat I could see the state of the house bank at a glance.

Inverter / Shore Power Data

The data being sent out for the MultiPlus is a bit different. There are two NMEA 2000 devices.

Actisense device display

The Actisense NMEA Reader displays what the two MultiPlus devices are and shows that one is utility/shore, and the other is the output.

MultiPlus inverter on shore power

Here’s what they look like when I am on shore power. You can see both devices have data from AC power sources, but the right one shows a much higher value. I assume this is my water heater or other devices that aren’t on the inverter side of the circuit – just the AC pass through.

MultiPlus inverter on battery power

Here’s what they look like when I am on battery power with the inverter running AC loads. The right device is showing zero values, indicating that shore power is gone/off.

MultiPlus inverter charger, inverter, and battery status

The above shows the left hand device, or 000502, which is the inverter side of things, but the PGNs for charger status, battery status, and inverter status.  The charger and inverter status are useful, and pass along to other devices on the network to show the general state.

The battery PGN is good to have too, if you don’t have a BMV or other device monitoring your battery state. Unfortunately, there’s no way I’ve found to configure instance IDs, so this battery status PGN conflicts with the one being sent by the BMV.

The right hand device also has a bunch of proprietary PGNs which I assume would be used to exchange more detailed info that Victron needs to track, or perhaps control devices via NMEA 2000 that are Victron specific.

Data is good

Finally having battery and inverter data on the NMEA 2000 network is wonderful. Being able to see the state of my electrical system on the various Maretron DSM displays around the boat, and especially on the MFDs while underway is very convenient. It gives me clear visibility into what is going on with the system, and I can use the various alarms and alerts to help augment what Victron has. I also like having this data being logged constantly to my Yacht Devices Voyage Recorder so that I can analyze performance and any issues later on.

It took a while for Victron to add this support, but I’m glad it’s finally here.

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