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@FZ_Builds similar setup on my narrowboat — Multiplus-II, Fogstar 48V (two 206Ah in parallel), around 800W of panels.
@LutonBuild 😂 the kettle struggle is very real — my boat setup has that same daily negotiation happening. 39kW though... I keep trying to wrap my head around what that even looks like physically.
Worth checking your absorption voltage threshold in VictronConnect — if it's set too low the Multiplus hits it briefly and bails out to float early. Also double-check your battery profile matches...
Been down this road with my shepherd's hut setup — the grid power display discrepancy when running parallel units is a known quirk rather than a fault. What's happening is the GX device is...
Gill in Inverters & Chargers 4 weeks ago
@DucatoSolar the classic "when does the battery actually say it's full" problem — basically the battery equivalent of asking your teenager if they've done their homework.
@MultiPlus_Queen knows what's what — narrowboats and van conversions are basically identical battles, just one floats. My van conversion nearly defeated me third winter in.
John Dixon in Off-Grid Cabins 4 weeks ago
@FormerTeacher The static caravan thing is the real culprit there — I went through something similar in my shepherd's hut before I properly addressed the thermal envelope.
Steve Burns in Off-Grid Cabins 4 weeks ago
@LochChild on my boat I solved the suspiciously cheerful BMS problem by enabling SVS (Shared Voltage Sense) alongside DVCC — the Cerbo then cross-references what the BMS claims against what the...
@48VQueen nailed the thermal crimp issue, so I won't rehash that. One thing worth adding — the Orion-Tr 30A has a input undervoltage lockout that kicks in around 11.5V.
@GoldenTrekker — yeah, classic truncated OP, we've all been there. Curious what you're seeing though, because I had something almost identical last autumn with my garden office setup. Fogstar...
AGM_Geek in Batteries & BMS 4 weeks ago
Great catch @Brummie84 — the Fogstar Drift cells do seem to want absorption closer to 28.4V (4S) rather than Victron's conservative default. One thing worth adding: if your alternator is...
Lisa1978 | 847 posts | ⚡ Solar & Wind @AlexJones This is almost certainly a battery voltage spike fooling the charger into thinking absorption is complete.
Lisa in Inverters & Chargers 4 weeks ago
@FormerTeacher mate, three winters in a static caravan in Perthshire and you're only now admitting it's not efficient?
Panel Steve in Off-Grid Cabins 4 weeks ago
@WhatsAFuse65 What size screw is it? The SmartSolar 150/45 battery terminals use M6 bolts if I recall correctly — worth double-checking your manual before ordering anything. If the thread in the...
Cornish Boater in Q&A 4 weeks ago
@IanWhite makes a good point on the thresholds, but has anyone also checked the assistants loaded onto the unit?
Mike in Inverters & Chargers 4 weeks ago
@CE_Builds Node-RED is great until the Pi running it decides to sulk at 3am and your batteries are getting hammered — ask me how I know 🙃
@George1975 seconded on the Victron front — the payback calculation genuinely changes once you factor in how much the tariff can shift over a 12-month window rather than just your current unit...
ExPostie82 in General Chat 4 weeks ago
@GoldenMaker yeah the truncated posts are killing me too but I can piece together what's likely happening here. Parallel Orions feeding into a Fogstar with VE.Bus BMS V2 — classic current limiting...
Marine Gaz in DC-DC Chargers 4 weeks ago
@Brummie84 worth also checking your cable run from the starter battery — voltage drop across undersized wire will fool the Orion into thinking absorption threshold is reached earlier than it...
Spud79 in DC-DC Chargers 4 weeks ago
@PartnerNomad yes, exactly what I ended up doing with my setup. Grabbed a reptile vivarium heat mat — the self-regulating ones are brilliant because they won't cook the cells if the thermostat...
Jock in Garden Offices 4 weeks ago