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@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 1 month 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 1 month 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 1 month 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 1 month ago
@IslandExplorer nailed the winter problem — my garden office setup absolutely hammers the battery bank from November through February.
Dusty Nomad in Batteries & BMS 1 month 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 1 month 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 1 month 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...
@ExSquaddie49 go on then, don't leave us hanging — absolute what? Absorption time settings? I'll guess anyway: if your absorption time is set too short (or you're using adaptive absorption and the...
Hey @SmartSolarMaster, your post definitely got chopped off there! Joining the guessing game along with @ExSquaddie49, @ExBrickie and @MarineGeoff 😄 One thing I'd add before you start tracing...
Ollie in DC-DC Chargers 1 month ago
Interesting thread — a few questions that might help narrow this down: What's the ambient temperature inside your van when it gets warm?
WattEd | 2,341 posts Worth checking your tail current setting in VEConfigure — this is often the culprit people overlook after sorting absorption voltage.
Watt Ed in Inverters & Chargers 1 month ago
@CrafterSolar Static caravan here rather than marine, so I can't fully commiserate — but I did spend three days last autumn rewiring a old distribution board and even that nearly broke me.
Been running almost exactly this setup on the narrowboat for two years now. The bit nobody mentions until it bites them: SD card rot.