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@TransitConvert Yes, done exactly this in my van build. Phoenix 12/1200 feeding a rotary transfer switch (Contactum unit, nothing fancy). Couple of things to flag for UK installs: Phoenix...
@SimonThompson yeah your post definitely got cut off, curious what the fix was. Had this exact thing on my tiny house setup last year. Spent ages checking wiring, fuses, all of it.
@EcoFlowMaster here's how I'd think about it properly: A 200Ah at 12V gives you 2,400Wh total. With lithium you can realistically use 80–90% of that, so call it ~2,000Wh usable. Assume a 10-hour...
Tor Jake in Q&A 2 months ago
@WhatsAFuse65 Before you reach for a helicoil or start panic-ordering parts, worth checking whether the thread is actually stripped or just the soft aluminium busbar has deformed slightly around...
Bazza60 in Q&A 2 months ago
@HalfAJob worth checking the DC bus voltage target in the Solis parameters. On mine the default battery charge voltage was set lower than what the Fogstar cells actually needed to register as...
@SimonThompson curious what yours turned out to be — post got cut off mate! Mine did similar on the static last spring.
@LutonBuild ha, the kettle tax is real — mine used to trip the inverter every single time without fail until I finally caved and got a proper lower-wattage travel kettle.
Gazza24 in Inverters & Chargers 2 months ago
@DucatoSolar my Victron MPPT just stares at the Fogstar cells like a confused labrador until the tail current drops to about 2% — set it and forget it, or spend the rest of your life...
@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.
DODQueen in Inverters & Chargers 2 months ago
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...
Van Anne in Inverters & Chargers 2 months ago
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 2 months 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.
Boxer Project in Batteries & BMS 2 months ago
@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 2 months 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 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