Anyone else using Victron Cerbo GX on a narrowboat — worth the cost over a simple BMV?

Upgraded my monitoring setup on the boat last month. Was running a Victron BMV-712 which did the job fine for basic SOC and voltage readings, but kept reading posts about people going full Cerbo GX with the GX Touch 50 and wondering if I was missing out. Took the plunge — £280-ish for the Cerbo plus another £150 for the touch screen.

Genuinely impressed by the VRM portal integration. Being able to check the system remotely when I'm away from the boat is brilliant — had an alert ping me that my 200Ah Fogstar Drift lithiums had dropped to 20% SOC mid-week when I wasn't aboard, turned out a bilge pump fault was draining things overnight. Would have come back to a dead system without it.

My question is whether anyone's found the Cerbo actually necessary for a single-battery-bank narrowboat setup, or if it's overkill. I've got a fairly modest system — 400W of Renogy panels, Victron SmartSolar MPPT 100/30, the Multiplus 12/1600 — so not massively complex. The BMV honestly handled 90% of what I needed day-to-day. Is the remote monitoring the only real killer feature here, or am I yet to discover something that justifies the outlay?

@JulieAllen ooh this is timely, I've been going back and forth on exactly this for my own narrowboat setup! Currently running a BMV-712 and honestly wondering the same thing.

Quick question though — are you running any inverter/charger alongside it? I've got a Multiplus-II and I keep reading the Cerbo really comes into its own when you've got multiple Victron devices to tie together via VE.Can/VE.Direct. Like is it the integration that's the main win over the BMV, rather than the monitoring itself?

Also curious whether the Touch 50 display is worth adding or if you're just using the VRM portal remotely? I'm out on the cut fairly regularly and decent mobile signal is... optimistic at best 😅

The price jump is pretty significant so just trying to work out if it's genuinely transformative or more of a nice-to-have for simpler setups.

@JulieAllen the Cerbo only really justifies itself once you've got multiple Victron devices talking to each other over VE.Can or VE.Direct. On my van build I've got a Multiplus-II, MPPT 150/35, and Lynx Shunt all reporting into the Cerbo — the consolidated view plus remote access via VRM is genuinely useful rather than just novelty.

For a narrowboat specifically, the always-on VRM logging is brilliant for understanding long-term patterns across different usage seasons.

That said, if you're running a simpler setup — shore power, single MPPT, nothing particularly automated — the BMV-712 with Bluetooth honestly covers 90% of day-to-day needs at a fraction of the price.

The real question is whether you're also running a Multiplus or Quattro for inverter/charging duties. If yes, Cerbo earns its money. If not, it's arguably overspecified.

AlexYoung76 | 47 posts

@JulieAllen made the jump myself about eight months ago on a 60-footer and honestly it depends on your setup complexity. @WayneJames is spot on about VE.Can/VE.Direct integration being the real selling point. For me the killer feature was being able to monitor everything remotely via VRM when I'm off the boat — knowing your battery state while you're sitting in a pub 200 yards away is genuinely reassuring! The touchscreen display is also much nicer than the BMV for at-a-glance checking.

That said, if you're running a fairly simple solar + alternator setup without a Multiplus or Quattro in the mix, the BMV-712 Bluetooth to your phone is probably sufficient and saves you a fair chunk of money. What inverter/charger are you running @JulieAllen?

ValleyCruiser | 134 posts

@JulieAllen great timing on this thread. One thing nobody's mentioned yet — the Cerbo really earns its keep when you're away from the boat. Being able to check in remotely via VRM Portal and actually do something about what you see (tweaking charge parameters, checking if the fridge is hammering the batteries while you're at work) is genuinely useful rather than just a novelty. On a narrowboat that's left moored for days at a time, that peace of mind alone was worth it for me. That said, @WayneJames is right that a solitary BMV setup doesn't get nearly the same mileage from it. What other Victron kit are you running alongside it?