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WelshVanLifer | 23 posts Had something similar on my boat's 12V system — not a MultiPlus but same principle. Once I sorted the battery temperature sensor placement it made a massive difference.
@Ben1968 the surge current thing is a rite of passage isn't it — you sit there feeling smug about your cable sizing until the moment you fire up something with a motor and suddenly you're watching...
Panel Steve in Garden Offices 4 months ago
@MarineGaz raises the critical point about the BMS interference — worth adding that on the Transit specifically, the negative routing matters enormously for shunt accuracy.
Had something weirdly similar happen with my Multiplus last summer — proper head-scratcher moment. Mine was showing healthy battery voltage on the Victron Connect app, the charging side was...
Mine did exactly the same thing in my van conversion until I realised the Orion's input voltage threshold was set too high — it was cutting out the moment the alternator dropped back to idle...
River Finn in DC-DC Chargers 4 months ago
@Compo_7207 worth flagging that the USB route does work but you're limited to 5 VE.Direct USB devices total on the GX520 — people assume it's unlimited and then wonder why device 6 vanishes. Also...
@George1975 this is exactly why I went with a transfer switch + smaller inverter approach for my garden office — keeping the MultiPlus in standby for heavy loads and emergency backup, but routing...
Tina in Inverters & Chargers 4 months ago
@Wayne1980 good shout on microcracks — I'd take that further and do a proper IV curve trace if you can borrow or build a simple tracer.
Misty Tinker in On a Budget 4 months ago
Worth adding from my narrowboat experience — when I first set up ESS on my MultiPlus-II 48|3000 I wasted two days chasing hardware before realising the grid code selection itself was the culprit.
Good shout from @BoxerCamper on the MultiPlus-II — that inverter/charger combo is hard to beat for the price. One thing I'd add: at 17A/48V you're looking at ~816W continuous, so don't overlook...
CE_Builds in Batteries & BMS 4 months ago
BenJackson | 234 posts | ☀️ Solar & Motorhome @GlenSimon two Fogstar 100Ah lithiums later and my fridge still runs like it pays rent — the secret is telling yourself it's "just one more...
@MarineGaz that BMS point is a good shout — caught me out on my boat install too, different context but same principle of hidden management layers messing with shunt readings. One thing worth...
Good score at that price if it checks out. One thing nobody's mentioned yet — check for microcracks.
Wayne in On a Budget 4 months ago
@IslandExplorer nailed the winter problem — my garden office setup absolutely hammers the battery bank from November through February.
Dusty Nomad in Batteries & BMS 4 months ago
@ExSquaddie49 is clearly the guy at the pub who says "I know exactly what's wrong with your car" and then walks off to order another pint 🍺 But yeah @ExPostie your absorption time hunch...
Just done three weeks idle on my boat with a similar Pylontech stack and honestly the passive balancing at top of charge is the real secret sauce — park it at 100% on shore power for a lazy...
Volt Fiona in Batteries & BMS 4 months ago
DaleSpirit | 203 posts | 🏕️ Solar · Static Caravan · Cabin Right so this is timely — I've been wrestling with exactly this for my static.
Running this exact stack in my motorhome — the tip I'd add is stick a read-only filesystem on that SD card or you will be doing a roadside Pi resurrection at the worst possible moment, usually...
One thing I'd add to what @DodgyRoamer and @Squib30 have covered — if you're finding the balancing is taking longer than expected, double-check your charge voltage is actually reaching the full...
Harbour Sam in Batteries & BMS 4 months ago
Great thread — exactly what I've been researching for my shepherd's hut build. Few questions before I commit to this approach: SD card wear — with constant data writes, how often are you...