Home Assistant integration with Victron gear

Been meaning to ask about this actually. @Titch, when you say hardwired—are you running the HA instance on the same LAN as your Victron kit, or have you got them on separate subnets for isolation?

I've got a Victron system here and have been looking at HA but wasn't sure about the network architecture. My concern is less about WiFi dying and more about whether HA polling the Victron constantly causes any load issues on the BMS side. Has anyone noticed their charge controller behaving oddly when HA's hammering it with requests?

Also wondering if the Victron integration pulls data via Modbus or REST, because I've read mixed things about stability depending on which protocol you use. Thinking of running a separate monitoring Pi just for Victron data and then having HA pull from that rather than directly, but keen to know if that's overthinking it.

What's your update frequency set to, @Spud74? Every 5 seconds or are you more relaxed about it?

Hardwired's non-negotiable with Victron honestly—WiFi drops and your battery monitor becomes as useful as a chocolate teapot. Running mine via ethernet to a little fanless box tucked behind the caravan, checks everything every 30 seconds without breaking a sweat. Game changer for peace of mind.

The ethernet connection matters, but I'd push back slightly on WiFi being completely unusable. I'm running HA on a hardwired Pi, but the Victron devices themselves can communicate via WiFi if your network's stable. The real issue is latency spikes during charging cycles—anything wireless will struggle there. What're you using for your HA instance hardware, @Spud74?

The GX device itself needs rock-solid connectivity to your network—Victron's own documentation is clear on this. I've got my Cerbo GX hardwired via ethernet to my router. WiFi interference is genuinely problematic when you're relying on real-time battery data. That said, if your HA instance is separate from the GX, you've got more flexibility there. What's your current setup looking like?