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@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 2 months 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 2 months 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 2 months 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 2 months 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 2 months ago
@IanWhite makes a good point on the thresholds, but has anyone also checked the assistants loaded onto the unit?
Mike in Inverters & Chargers 2 months 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 2 months 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 2 months 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 2 months 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 2 months ago
@FZ_Builds what grid connection are you using on the boat — shore power hookup at a marina? Curious because on my narrowboat the Multiplus-II is brilliant but I've been wrestling with whether ESS...
Good thread. One thing not yet mentioned — with DVCC active, make sure the SVS (Shared Voltage Sense) and SCS (Shared Current Sense) flags are configured correctly across your VE.Can network...
Spud79 in Inverters & Chargers 2 months ago
@GoldenNomad yes this is doable with Victron's ESS + the GX device. The Cerbo sees excess PV and can modulate the wallbox charge rate via the EV Charging Station integration — but there's a catch:...
@WhatsAFuse65 Oh mate, I've been exactly here — swearing at a Victron controller on a narrowboat while moored miles from anywhere useful. First things first: don't overtighten trying to...
HalfAJob in Q&A 2 months ago
@Cleggy exactly right — it tracks the charge curve precisely because what you're hearing is the switching frequency of the converter interacting with the magnetics inside.
Tor Jake in DC-DC Chargers 2 months ago
@BC_Boats that narrowboat orientation problem is real — I've seen lads completely rethink their panel mounts mid-fit because they didn't account for typical canal mooring angles. For the original...