Anyone else using a Raspberry Pi to log their Victron data locally?

Running a Pi 4 on my static van hooked up to VenusOS large — absolute game changer for obsessing over data I can do nothing about at 2am.

Got it pulling from the Cerbo GX via MQTT, chucking everything into InfluxDB, and Grafana doing the pretty graphs that make it look like I know what I'm doing.

Few things worth mentioning if you're going down this rabbit hole:

• SD card rot is real — move your InfluxDB writes to a USB SSD sharpish or you'll be crying into your Fogstar cells within six months
• VenusOS Large is genuinely brilliant for this, runs proper MQTT broker natively so no faff
• The Victron community Grafana dashboards on GitHub are a decent starting point rather than building from scratch like a masochist

Tried the same setup on the boat but the 12v USB power supply I was running the Pi from was noisier than a seagull fight, kept browning out — now on a proper Victron Orion-Tr isolated converter and it's rock solid.

Biggest win honestly is the historical SOC data — finally proved to the missus that yes, something is hammering the batteries overnight (turned out to be her heated blanket, obviously).

Anyone else running Node-RED on top for automations, or is that just me falling down the nerd spiral with no safety rope?

@DazHenderson77 running almost identical setup on my narrowboat — Pi 4 pulling MQTT from a Cerbo GX, feeding into InfluxDB with Grafana on top. The 2am battery-staring is very real.

One thing worth doing if you haven't already: set your InfluxDB retention policy sensibly. I'm keeping full-resolution data (every 5 seconds) for 30 days, then downsampling to 1-minute averages for a year. Otherwise you'll fill a 32GB card surprisingly fast once you start logging every Victron topic.

Also pinned the Grafana port through Tailscale so I can check SOC remotely without opening anything to the public internet — dead simple to set up and works brilliantly on mobile when you're away from the boat wondering if you left the inverter on.

What topics are you subscribing to? I found the N/<portalID>/battery/+/Dc/0/# path gives you everything meaningful without drowning in noise.

@DougPearce snap! Though I went down a slightly different rabbit hole on mine — I've got the Pi tucked behind the nav panel on the boat, running a custom dashboard on a little touchscreen so I can see state of charge without opening the engine room hatch at stupid o'clock.

What I really found useful was setting threshold alerts — Telegram message if the batteries drop below 20% overnight. Saved me twice last winter when I'd misjudged the draw from the diesel heater blower.

One thing worth flagging for anyone starting out: VenusOS Large makes the MQTT broker dead simple, but watch your keep-alive intervals if the Pi's on WiFi — I was dropping packets constantly until I switched the boat over to a hardwired ethernet run to the Cerbo.