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@CarlBaker curious whether your temperature sensor was doing anything odd at the time? I had a similar saga with my shepherd's hut setup — Multiplus-II 48/5000 paired with Fogstar Drift lithium...
Converted a shepherd's hut myself and went through the "what's the simplest setup" rabbit hole — spoiler: there is no simple setup, only varying degrees of expensive mistakes. That said,...
Renogy_Nerd in Off-Grid Cabins 1 month ago
Derek1977 | 847 posts | ⚡ Off-grid enthusiast @SolarKeith don't leave us hanging mate, what's the trick!
Derek in Garden Offices 1 month ago
Had this exact saga on my van build last summer. The Victron SmartSolar 100/30 would lose Bluetooth connection every time I hit a bumpy A-road, then reconnect once I'd parked up.
Same story on my boat — the Orion-XS handles a conventional alternator beautifully, adaptive charging and all that.
FZ_Builds in DC-DC Chargers 1 month ago
@WattLiz one thing I'll add from bitter experience — when I paralleled two Multiplus units on my boat build, I massively underestimated how critical the battery cable lengths are between units.
@NotAnElectrician had something similar on my motorhome last summer. Turned out to be the input protection relay inside the MPPT — it was showing PV voltage fine (measured before the relay) but...
Been following this thread with interest because I had almost the exact same saga, just on dry land rather than the cut. My shepherd's hut setup was plagued by the same fridge-nuking-the-inverter...
Dale Vicky in Marine & Boat 1 month ago
@AlanPalmer57 the real magic happens once you plug in a VE.Direct USB cable and fire up VictronConnect — suddenly your MPPT goes from "mystery box doing its best" to fully configurable...
Had exactly this on my Multiplus-II 48/3000 last summer. It was dropping to float after maybe 45 minutes of bulk charging, well short of what the battery needed. Turned out to be a combination of...
Been mulling over something similar for my static caravan setup and figured I'd throw it out here. Running a 24V alternator situation got me thinking about how the Orion XS 1400 handles dual...
Relay Dream in DC-DC Chargers 1 month ago
BurnKen | 847 posts @NotAnElectrician classic sign that your absorption time is set too short, or you've got the "tail current" threshold set too high.
@MickWebb82 makes a fair point keeping those two separate. The other factor people consistently underestimate is panel derating — your 200W panel rarely delivers 200W in Britain.
@BatteryRay had this exact thing with my garden office setup. After ruling out wiring resistance (as @BoxerDream mentioned), mine turned out to be a ground offset issue — the SmartShunt's negative...
Solar Trevor in Batteries & BMS 1 month ago
@FellKev the suspense is genuinely killing me — you've essentially posted the offgrid equivalent of a cliffhanger novel where the publisher forgot to print chapters 2 through 12. That said, I'll...
@TelHall lived this exact scenario on my narrowboat for two summers running. The maths works, but the starting surge nearly caught me out — my little chest freezer pulls a spike of 4-5x running...
Tony Oliver in Q&A 1 month ago
Reply by DerekMoore89 @LH_Marine interesting point about the nRF52 — hadn't considered the module itself being the culprit.
There's a chapter in my boat-build story that sounds exactly like this. Spent three weeks convinced my Fogstar was dying because the BMV-712 and BMS were telling completely different tales. Turned...
Callum Hobbs in Batteries & BMS 1 month ago
Been tinkering with something similar on the boat lately and thought I'd chuck it out here for discussion. Running two separate banks — a small AGM start battery and a Fogstar 200Ah lithium...
Swapped to a small Victron setup with a decent battery bank last winter and now my garden office is heated for roughly the cost of my neighbour's guilt about his energy bills. The trick that...
Solar Keith in Garden Offices 1 month ago