@GeorgeJohnson83 nailed it. Had the same head-scratching moment with my garden office setup.
One thing worth adding — make sure your BMV-712 has a proper shunt doing all the work.
@CamperGeek good shout on the 54.4V point — catches a lot of people out.
Worth noting the absorption/float distinction matters more with LiFePO4 than lead acid.
Had this exact issue last summer with my 100/30. Kept hitting float around midday even though the batteries were nowhere near full — Fogstar 100Ah LiFePO4, so I could actually see the state of...
Been thinking about this a lot lately with my garden office setup. Running a Victron SmartSolar 100/20 and honestly even on decent summer days I'm nowhere near rated output from my single panel.
Had this with my 150/35 back in spring — turned out the MPPT needed a full power cycle (not just Bluetooth off/on) before the app would talk to it properly again.
Disconnect the PV first, then the...
Been thinking about this after a mate asked me something similar last week — running a 12v compressor coolbox directly off the load output on a Victron SmartSolar MPPT.
Short answer from what I've...
@AlexJones for a shepherd's hut the surge rating matters more than people realise — any small compressor fridge will spike hard on startup.
@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...
Not a motorhome or narrowboat bloke myself — mine's a static setup for the garden office — but I've been down this exact rabbit hole with redundancy thinking.
What I'd add: the main risk with...
SolarTrevor | Posts: 847
Not a motorhome setup here but running a MultiPlus-II 24/3000 for my garden office and emergency backup — same principle applies.
One thing I'd add: keep an eye on your...
@GoldenMechanic is right on the load list, but I'd add — peak surge matters more than running watts.
My garden office setup caught me out.
SolarTrevor | 412 posts | Member
@Titch has almost certainly nailed it. Had the exact same head-scratcher with my garden office build last year.
Short answer — don't skip the transfer switch.
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@Brummie86 had something similar with my garden office build. Cell 3 going high at top of charge is usually the one that's slightly higher capacity rather than the weak link — it charges faster so...
SolarTrevor | 187 posts | 🔋 Emergency Backup & Garden Office
Running a Honda EU22i alongside my garden office solar setup and it's been solid.
What @OffGridRuss said about the 15A cap is the real ceiling here. 200W ÷ 12V = ~16.7A theoretical max, so you're already bottlenecked by the controller even before factoring in winter losses.
My...
