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@BurnGlen this is one of those things that sounds minor until you're crouched in the back of a van at midnight trying to navigate three menus deep just to check your MPPT settings.
Has anyone confirmed whether the issue is specifically worse when solar is simultaneously pushing charge into the leisure battery?
PVKing in Batteries & BMS 1 week ago
Ran two mismatched lithium packs on my narrowboat for a while — the trick is never letting them charge each other directly; isolate them with a Victron Lynx Distributor and let the Multiplus-II...
Spud in Inverters & Chargers 1 week ago
Good shout @SolarJo — this caught me out on the narrowboat too. Worth noting that your MPPT controller is often the first bottleneck people hit before they even reach the battery's charge limit.
Few things jumping out at me here beyond the chemistry chat — $1,400 for a 7 kWh bank works out at £1.10/Wh-ish (assuming rough dollar parity for import costs), which honestly isn't that far off...
Chopper in Batteries & BMS 1 week ago
Seeing this on my static caravan setup too — MultiPlus-II 48V with Fogstar Drift lithium cells. Turned out my battery capacity setting in VEConfigure was massively underspecified, so the charge...
@BrookRunner solid foundation with the Renogy panel — they're decent value for money. One thing worth adding for anyone replicating this on a tight budget: don't skimp on the cable sizing.
@OldSailor is on the right track. The key thing people miss is that the Orion-Tr Smart needs to be set up in engine detection mode rather than relying on voltage sensing alone — otherwise it gets...
LH_Marine in Batteries & BMS 1 week ago
@PanelLouise is right about the detail being critical. The freezer's actual draw matters massively — most small chest freezers (think Alpicool or Brass Monkey size) cycle on and off rather than...
Devon Boater in Q&A 1 week ago
@DalesWanderer's figure sounds about right from what I've seen too. Worth noting though — with those older internal BMS packs the balance current is pretty tiny, like 50–100mA.
Van Anne in Batteries & BMS 1 week ago
@ForestDaz three days is nothing, mate — I lost a fortnight of my life to this exact rabbit hole before realising VRM was just being dramatic about a phantom AC load reading that existed entirely...
@GafferTapeKing19 classic voltage-under-load sag issue — worth checking your battery cable cross-section and connection resistance first before assuming it's a BMS or cell problem. On my static...
Classic case of the Multiplus trusting its internal current sensor more than reality — check your battery temp sensor cable first, because a dodgy NTC reading will convince the charger the...
Rob in Inverters & Chargers 1 week ago
Ooh this is interesting timing — I'm literally mid-way through setting up my Ducato conversion and about to connect to hookup points at campsites for the first time. Does the relay test fault only...
@IslandOffGrid classic Victron gotcha, this one. Had the exact same drama on my Boxer motorhome build — MultiPlus was convinced my Fogstar Drift 200Ah was full after a leisurely Sunday morning...
Rob1963 | 2,341 posts | 🔧 Grumpy Sparky "Humsienk" — never heard of them, which tells you everything you need to know about how much R&D went into that BMS. Classic symptom with...
Rob in Batteries & BMS 1 week ago
@DazHenderson77 😂 yeah I clocked that too — pretty sure OP means 40kWh or possibly just 40Ah, lost something in translation there. @TransitConvert — without seeing your full setup it's hard to...
Gaz Allen in Batteries & BMS 1 week ago
@Cleggy resilience is doing a lot of heavy lifting in my ROI spreadsheet these days, not gonna lie — my shepherd's hut doesn't care what Octopus Energy is charging per unit when there's a grid...
Salty Trekker in General Chat 1 week ago
@BurnGlen yeah the inconsistency bugs me too. Some tiles are tappable, others are dead — no obvious logic to it. What I'd want alongside that: a proper "favourites" layer on the...
@TracyKnight — swarf in a new unit is more common than people admit. On the MultiPlus specifically, check the DC negative busbar area carefully; that washer may be a legitimate fixing for the...