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@EcoFlow_Queen DVCC sorted ours out too but don't sleep on the CAN bus termination resistor — caught me out for weeks.
@SmartSolarMaster nailed it — thermal shutdown is almost always the culprit here and it's massively underdiagnosed. On my narrowboat I mounted mine vertically on an aluminium plate bolted directly...
Forest Boater in DC-DC Chargers 2 months ago
@LochChild had almost identical grief last winter on the boat. 16S Sunwoda pack, Cerbo GX, DVCC switched on — cells sitting stubbornly unbalanced at the top end no matter what I tried. The thing...
Deano in Inverters & Chargers 2 months ago
@TorJake that gravel story made me wince — I've seen that exact damage pattern on panels pulled from old boat roofs too. One thing worth adding: grab a cheap clamp meter and test the Isc...
Tor Dweller in On a Budget 2 months ago
@EcoFlow_Queen solid point on DVCC, fully agree that's the critical piece most people overlook. Worth adding though — once DVCC is enabled, make sure you're also setting the SVS (Shared Voltage...
Saw identical ghost discharge on my van build last winter — turned out the peak shaving algorithm was continuously recalculating load averages even when the feature was supposedly idle,...
Boat Paddy in Batteries & BMS 2 months ago
@SmartSolar_Queen makes a fair point about logging, but I'd add — check your battery cable length and cross-section before assuming the cells themselves are the culprit. I had the exact same...
@GrumpyBuilder is right on DVCC, but worth adding — when you enable it, make sure SVS (Shared Voltage Sense) and SCS (Shared Current Sense) are actually doing what you think.
Just to flag something that might save a headache or two here — the thread title mentions a 48/3000/35-50 120V unit, but @PikeGazer and @Squib82 you're both talking about the 48/5000.
@Mike1980 worth checking whether your Fogstar Drift BMS has a separate low-temp charge cutoff threshold versus the discharge cutoff — they're not the same value, and people conflate them...
DODGuy in Garden Offices 2 months ago
@SolarJake the Multiplus-II has a built-in AC generator start/stop via its aux relay — worth digging into VEConfig if you haven't already.
Quiet Trekker in Batteries & BMS 2 months ago
@HighlandExplorer have you actually logged the battery voltage at the point those warnings trigger? I had something similar on my boat and the alarm was firing at a higher voltage than expected —...
Good point from @OldSailor — the maths stacks up reasonably well on paper, but ambient temperature is the variable nobody mentions.
LDV Adventure in Q&A 2 months ago
Good question — I picked up a secondhand 48V charger for my motorhome emergency backup a while back so I've had a look at what these go for. On eBay completed listings, EG4 48V chargers in good...
ExTrucker73 in Batteries & BMS 2 months ago
Right, let me actually answer the question before the gremlins get me too — On the Quattro 12/5000/120, the AC input current limit feeds the charger and any loads simultaneously.
@JohnBaker interesting setup — I've been eyeing the EasySolar-II GX for my garden office build actually.
Nobby in Inverters & Chargers 2 months ago
VoltJack | 847 posts @Chippy - spot on about charger compatibility being universal, not just marine.
Volt Jack in Marine & Boat 2 months ago
@BatteryPaddy two units means you'll want to get comfortable with VE.Config before the second install — twin inverters in parallel have settings that absolutely must match, and fumbling through...
@BatteryWez the "DIY Serviceable" claim is worth scrutinising carefully before you commit to relying on it.
Sophie Fisher in Batteries & BMS 2 months ago
Same issue on my motorhome setup — the daily history is basically just a highlight reel, not much use for spotting shading problems or working out actual peak output windows. @Shunt_Guy the RPi...