Anyone else running Victron Multiplus as their main inverter/charger in a van build?

Fitted a Multiplus-II 12/3000 in my Transit last spring alongside a 200Ah Fogstar Drift LiFePO4 and a 400W Victron MPPT setup. The integration through VE.Bus and Cerbo GX is genuinely brilliant once you get your head around it — everything talks to everything, shore power handover is seamless, and the BMS comms via VE.Direct keeps the whole lot protected properly.

One thing I'm still wrestling with is the charge profile settings. Running the Fogstar at absorption 14.2V, float 13.5V which is what Fogstar recommend, but I've seen people arguing for a lower float or even disabling float entirely on LFP. The Multiplus gives you full control over this in VEConfigure3 so it's not a hardware problem, just not sure what's actually best long-term for cell health.

Also curious whether anyone's had grief with the transfer switch delay when switching off shore power — I'm getting a brief flicker on sensitive loads (laptop, monitors) even with the UPS mode enabled. Suspect it might be a settings issue rather than a fault. Anyone dialled this in properly?

@BatteryDaz not a van here but I run a Multiplus-II 24/3000 in my static caravan on a 200Ah lithium bank, so the experience translates pretty well.

The moment everything clicked for me was watching the Cerbo GX juggle shore power, solar input, and battery discharge priorities automatically during a stormy November weekend when the grid kept dipping. Just sat there like a conductor keeping the whole orchestra in time.

One thing worth mentioning that catches people out — make sure your transfer switch settings are dialled in properly for UK grid frequency tolerance. Took me an embarrassing amount of forum reading before I realised mine was slightly misconfigured and causing unnecessary grid disconnections.

The VE.Configure software feels intimidating at first but once you've worked through it, you realise Victron have thought of almost every scenario. Almost.

@BatteryDaz Not a van build here — I've got a Multiplus-II 24/3000 running my shepherd's hut, but the architecture is essentially identical so worth chiming in.

One thing people consistently underestimate with the Multiplus-II is the PowerAssist feature. Once you've dialled in the input current limit properly, it'll seamlessly supplement shore power rather than just switching between sources — genuinely useful if you're ever on a restricted 10A hookup.

Also worth noting: with LiFePO4 you must configure the charge curve correctly in VEConfigure. Victron's defaults assume lead-acid. The absorption voltage ceiling in particular needs dropping — I run 28.4V on the 24V system (equivalent ~14.2V on 12V).

The Cerbo GX remote monitoring via VRM portal is arguably the killer feature long-term. Being able to check SOC and troubleshoot remotely has saved me multiple times.

Really interesting thread! I've got a Multiplus-II 12/3000 in my Sprinter conversion paired with 280Ah of Eve cells in a DIY pack. One thing I'd add that nobody's mentioned yet — the PowerAssist feature is genuinely useful when you're on a weak hookup at a campsite. I've got mine set to limit shore input to 10A and the Multiplus tops up from the batteries when demand spikes, so I never trip the site's breaker. Took a bit of fiddling with VictronConnect to get the thresholds right but works a treat now. @BatteryDaz are you using ESS or just the standard inverter/charger profile? I found ESS overkill for van life personally and switched back to the simpler setup.

Really interesting to see how many of us have landed on the Multiplus-II as the centrepiece. Running a 24/3000 myself in a long-wheel-base Transit custom build on Exmoor — paired with 300Ah of Fogstar Drift cells and a SmartSolar 150/35.

The thing nobody warned me about initially was the AC input current limiter when hooked to a weak hookup post. Spent a confused afternoon at a Dartmoor campsite before I realised the site's 6A bollard was causing the Multiplus to hunt between inverting and accepting shore power constantly. Once I set the input current limit properly through VictronConnect it settled beautifully.

@Julie1972 — curious what BMS you went with for the Eve cells? I've seen mixed experiences with Daly vs JK on the VE.Bus communication side of things.