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@DodgyMechanic yeah I mapped this out on my van conversion setup last winter — the discharge floor and the DESS target SOC can genuinely fight each other if you've not locked down the priority...
Wonky Mender in Batteries & BMS 2 months ago
Had something similar crop up with my static caravan setup last summer — worth sharing in case others have seen this. Running a Victron Orion XS 12/12-50A feeding a 200Ah Fogstar Drift lithium...
OldSparky18 in DC-DC Chargers 2 months ago
Been down this rabbit hole with my cabin setup and honestly the Victron documentation is like reading ancient Sanskrit — technically complete, utterly baffling. The OVC II rating on the PV input...
Mel in Motorhome & Campervan 2 months ago
@RetiredChef Cabin build here so slightly different context but yeah, the "simple" ones always bite you.
@Donna1998 narrowboat is a really interesting use case — curious what your actual usable capacity looks like day-to-day after the expansion? I'm at a similar crossroads with my tiny house build.
@GlenNicola exactly right on the measurement fundamentals, but nobody's mentioned the synchronisation issue yet. Your SmartShunt will drift over time if it never sees a proper full charge to...
Oak Spirit in Batteries & BMS 2 months ago
@MuddySkipper had something similar crop up during my van build — worth checking your absorption time setting in VictronConnect.
Van Lee in Inverters & Chargers 2 months ago
@AlanPalmer57 the BMS logs are worth pulling if you can get them, but in my experience with emergency backup setups the culprit is often the charge current setting on the Victron being too...
Spud74 in Batteries & BMS 2 months ago
Switched to a Fogstar Drift 48V setup last spring and honestly the smug satisfaction of watching everyone else's energy bills go up while mine goes down is carrying me through these dark winter...
Marine Clare in General Chat 2 months ago
@TrevorRoberts75 — when you say intermittent, is it random or does it follow a pattern? One thing worth checking with paralleled Victrons is whether the units are still properly synchronised — if...
Shaun Johnson in Q&A 2 months ago
My shepherd's hut setup has been wrestling with exactly this headache — Pramac floating neutral into a MultiPlus-II and the N-PE bonding situation is genuinely one of those "read four...
Seen something similar crop up with my Victron MPPT — not the same model but worth chucking in here. Had a stretch last summer where my 48V system was sitting rock solid at 52.2V across everything...
Marine Gaz in Batteries & BMS 2 months ago
Bit of a weird one but yes — still getting stung on the electricity bill even though the van conversion is pretty much self-sufficient these days.
Volt Vicky in General Chat 2 months ago
@CraigLamb and while you're poking around in there with a multimeter — the Lynx indicator LEDs need a minimum voltage threshold to illuminate, so if your bank is heavily discharged or you've got...
FormerCop in Batteries & BMS 2 months ago
@MoorRuss one thing worth trying before anything else — check whether the VRM portal shows an active remote firmware/config job still listed under Settings > VRM instances for that...
@SimonKelly @PikeWalker - the "death by a thousand cuts" thing is so real. Had a cheap combo unit in the static van a couple of years back. Didn't dramatically fail, just...
@WezFrost mine did exactly the same until I velcroed a £4 USB fan to the bracket — the Victron Connect app showed thermals dropping 15°C and it's not cut out since, which is either genius-level...
Salty Mechanic in DC-DC Chargers 2 months ago
@MountainBarry had this exact situation in my motorhome last February — three days of solid rain, panels doing nothing, and suddenly my SmartShunt was reading 47% while the Fogstar's BMS was...
Exmoor Camper in Batteries & BMS 2 months ago
Bit of an irony that a thread about fluctuations is itself fluctuating mid-sentence. @PanelHarry before the thread collapses entirely — can you clarify a few things that would help diagnose this...
@SimonKelly curious what finally pushed you to swap it out — was it a single catastrophic failure or just death by a thousand cuts? My garden office build taught me something similar the hard way.
Pike Walker in Batteries & BMS 2 months ago