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@SimonKelly and @LindaJones69 have covered the headline numbers, but the devil's in the compressor start surge — cheap inverters will trip when that motor kicks in, so make sure your inverter's...
OldSailor in Q&A 2 months ago
@HighlandExplorer had the exact same drama in my shepherds hut — turned out my Victron BMV-712 was configured with the wrong battery capacity, so the Multiplus was essentially panicking based on a...
@TorJake £40 for 200W is genuinely decent if the cells are intact — that's the critical caveat nobody mentions enough. Beyond the obvious physical inspection, grab a cheap thermal camera app or...
Tracy Allen in On a Budget 2 months ago
Really relevant thread for me — I've got a Victron IP22 on my 28ft narrowboat and went through exactly this pain when I swapped to Fogstar lithium cells last spring. The bit that caught me out was...
Cornish Boater in Marine & Boat 2 months ago
@LiamFrost70 insulation is brilliant at keeping heat in once it's built up — which is exactly your problem.
Bay Jason in Garden Offices 2 months ago
@GeorgeJohnson83 good news — a 200Ah LiFePO4 at 12V gives you a usable ~2kWh (assuming 80% DoD on Fogstar's Drift).
Simon Kelly in Q&A 2 months ago
Good shout on DVCC and CAN termination — both sorted on my static van setup ages ago. What nobody mentioned to me when I first wired this in: the JK BMS charge current limit needs to actually...
Fell Kev in Inverters & Chargers 2 months ago
@ThistleTel narrowboats and EV charging — you're basically asking a 240V system to do the heavy lifting while floating on a canal, which is either genius or the plot of a cautionary tale...
FET_Fan in Marine & Boat 2 months ago
Good timing on this thread — I went through exactly this when I was wiring the cabin build and then again sorting EV charging logic off-grid. One thing nobody's mentioned yet: if you're pulling...
FormerCop77 in DC-DC Chargers 2 months ago
@Mike1980 the Fogstar Drift's low-temp charge cutoff is typically around 0°C, but the cell temperature lags significantly behind ambient — so even if your office is sitting at 3–4°C, the cells...
@BoatPaddy that recalibration loop theory rings very true actually. I had something eerily similar on my motorhome build before I switched to a proper Victron SmartShunt doing the SoC tracking...
Nessa68 in Batteries & BMS 2 months ago
@GeorgeJohnson83 depends heavily on the freezer. A decent chest freezer (say 60-80L) typically draws around 80-100Wh per day in moderate temps, so overnight you're probably looking at 40-60Wh if...
Linda Jones in Q&A 2 months ago
@SmartSolarMaster @ForestBoater this rings so many bells. Had the exact same mystery with my motorhome build last summer — long M6 runs, Orion cutting out somewhere past Preston every single time...
Island OffGrid in DC-DC Chargers 2 months ago
Classic 16S drama — my van build taught me that DVCC's "Shared Voltage Sense" can quietly fight your BMS if the Cerbo's firmware isn't current, so check Remote Console > Settings >...
@ThistleTel what's the actual inverter/charger combination you've landed on? That's the crux of it really. On narrowboats the shore power situation is complicated by the fact that most marina...
RetiredSquaddie in Marine & Boat 2 months ago
Ran into this exact rabbit hole myself when I first wired up my narrowboat. Spent an embarrassing afternoon convinced my Orion-TR Smart was faulty before realising I'd wired the remote terminal to...
Boxer Wanderer in DC-DC Chargers 2 months ago
@Titch and @SmartSolar_Queen have both nailed the obvious culprits. One thing worth adding — check your low battery warning threshold in the Multiplus settings via VictronConnect.
@SmartSolarMaster is right to flag thermal shutdown, but worth ruling out one more thing first — check whether you've got the Orion mounted vertically with the fins horizontal.
Pennine Nomad in DC-DC Chargers 2 months ago
Great thread @PN_Camper. One thing worth adding to what @DefenderSolar mentioned — the H/L terminal on the Orion-TR Smart will accept anywhere from around 3.5V up to your input voltage as a...
KMV_Marine in DC-DC Chargers 2 months ago
@QuietTrekker is right about the aux relay, but worth noting the Multiplus-II's generator start logic works off SOC thresholds or AC load — not just one or the other.
Emma Edwards in Batteries & BMS 2 months ago