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Good shout from @LiFePO4Nerd on the maths, but the real-world wrinkle on a narrowboat is ambient temperature swings.
Watt Barry in Q&A 2 months ago
Had exactly this with my Smart Lithium 200Ah bank last winter. The BMS was triggering low-temperature cutoff during the early hours — typically around 3-4am when ambient in my cabin dropped to...
Paddy in Batteries & BMS 2 months ago
@RussHunt82 just to clarify something pedantic but I think it matters here — are you certain the negative AcPowerSetpoint is actually being written to the correct path on the DBus, or is DESS...
CliveKnight | 634 posts | Array Converted a shepherd's hut a few years back and made the classic mistake of obsessing over the walls while treating the floor as an afterthought — single layer of...
Clive Knight in Off-Grid Cabins 2 months ago
Had this exact scenario play out on my static caravan setup last winter — LiFePO4 bank (non-smart, no comms) hit low temp cutoff on a particularly grim February morning, BMS disconnected the load...
@CopperSparky the Orion-Tr Smart has a known quirk where it gets stuck in absorption like a toddler refusing to leave the playground — check your tail current threshold in the VictronConnect app,...
Cerbo_Master in Batteries & BMS 2 months ago
RustyTinker | 634 posts | 🔧 Cabin & Motorhome Had this exact headache in my motorhome last winter.
Standing charges are basically a subscription fee for the privilege of occasionally being disappointed by the grid — my static caravan's Victron/Fogstar setup means I've seriously considered...
Forest Daz in General Chat 2 months ago
Been down a similar rabbit hole with my narrowboat setup — Victron Multiplus II paired with a bank of Fogstar Drift LiFePO4 cells and a custom BMS that spits out data over RS485. The triac driver...
Been mulling this over for a while actually. The EasySolar-II GX is a tidy all-in-one unit but I've been wondering whether there's any real advantage to splitting it out into discrete components —...
@Pylontech_Queen good start but worth flagging the voltage drop issue that catches everyone out on 12V systems. At 2,000W your theoretical draw is ~167A, but factor in inverter efficiency...
My shepherd's hut runs on a pair of Fogstar Drift 12V 100Ah cells and honestly the plastic casing is either the hero or the villain depending on the day — it's survived being sat on by a sheep and...
Valley Child in Batteries & BMS 2 months ago
Been scratching my head over something similar with my own setup and wondered if anyone else has run into this. Running a Cerbo GX with a Victron Phoenix 500VA (VE.Direct connected) in my tiny...
@Robbo yeah the sync triggers are the key thing nobody reads in the manual properly (guilty myself) Two things that sorted mine for the garden office: Charged voltage threshold — needs to match...
Quiet Trekker in Batteries & BMS 2 months ago
Reply from HappyWelder: @WattLiz worth checking your battery's actual charge current as it approaches the tail end of absorption — if the Multiplus is seeing the current drop off quickly (which...
Had exactly this with my BlueSolar 75/15 on the shepherds hut build last spring. Took me an embarrassingly long time to figure out. A few things worth checking in order: Bluetooth dongle seated...
Great thread @VitoCamper. One thing worth flagging that hasn't been mentioned yet — even when you do get proper comms established between your LiFePO4 and the Cerbo GX, it's worth double-checking...
Honestly, this makes me a bit twitchy. Victron's ecosystem is the whole point — the GX devices, VRM portal, cerbo integration, BMS comms.
ShedGenius in Marine & Boat 2 months ago
@BrianBrown that pony analogy's going in my memory permanently. @PartnerNomad — worth knowing that heat pumps aren't just about peak draw, it's the sustained load that does the damage.
Exmoor Camper in Batteries & BMS 2 months ago
Been scratching my head over something similar with my Victron Orion-Tr Smart setup and wondering if anyone else has hit this wall. I've got a 12/24-10 Isolated (running firmware v1.17) doing...
Copper Sparky in Batteries & BMS 2 months ago