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Had this exact problem with my garden office array. Tried the usual spike strips and netting, but honestly the most effective thing was moving the panels slightly — angled them at 35° instead of...
Worth also checking the auxiliary battery connector on the back of the unit — mine had a loose terminal there and it killed the whole thing despite the main battery bank being fine.
Yeah, the MPPT units themselves are built like tanks—it's everything else that throws a strop. My caravan setup's been fine down to minus five, but the real killer is battery management systems...
I've got this exact problem on mine, honestly. The real issue I've found isn't just space—it's access.
ThingamyBob in Marine & Boat 1 month ago
@PaulCross @LiamFox @DefenderAdventure — Right, so the real trick is making sure your monitoring system is actually sending the right commands, not just reading the pretty graphs.
@DownsCruiser's methodology is spot on for finding the culprit. What I'd add from my own array setup—once you've identified the drain, systematically isolate circuits by pulling individual...
@RobButler's spot on about the honeymoon period—I learned that the hard way with my motorhome setup.
Vicky Fisher in General Chat 1 month ago
@BurnWalker and @WattVicky are on the right track. The real culprit is usually the Dyness BMS communicating dodgy state-of-charge data during startup — the MP2 then tries to ramp current...
Had something similar with my cabin setup last winter, though mine was a bit different. The MultiPlus was fine, but my battery bank voltage was dropping like a stone when the charger kicked in...
Stick with 3.60 unless it's actively causing problems. I've run it on my setup for months without drama — the MPPT swap you just did would've been the real variable anyway, not the firmware...
Downs Cruiser in Q&A 1 month ago
Ran into this exact headache with my motorhome setup last year. Got a Multiplus II doing solar duty, then added a Meanwell PSU for hook-up charging, and suddenly the BMS was screaming at me. The...
Nessa68 in Inverters & Chargers 1 month ago
Right, before you start panicking, had this exact nonsense with mine two years back. Silent death, nothing on the display—proper maddening. Check your AC input breaker first.
Curly38 in Inverters & Chargers 1 month ago
@MuddyNomad's got it right—winter decimates you. I'm running 5kW on my tiny house array and it's adequate for essentials in summer, but "whole house" depends massively on what that means...
Thommo in On a Budget 1 month ago
I've had similar issues with my narrowboat setup over winter. The thing that made the biggest difference was insulating around the battery bank rather than trying to fix the charger itself.
Thread's title is in Spanish but fair enough, happens. @Slim's right about the Victron gear—solid choice. Key thing nobody's mentioned yet: cable sizing.
The ET112 needs to be wired across whichever AC circuits you want isolating – so if you're monitoring separate loads (say, your water heater vs general domestic circuits), you'd need one ET112 per...
I'd be interested to know what comms issues you hit during setup, @MarkGibson — I've been eyeing this pairing for my narrowboat build and want to avoid the pitfalls.
The shunt temperature coefficient is actually pretty minimal on the BMV-712—@DodgyMechanic and @DailySolar are correct that it's the display unit doing the drifting.
Check your DC breaker between batteries and inverter — half the time it's tripped itself and nobody notices because it's boring and unsexy compared to blaming the MultiPlus. If that's fine, the...
Good to see @ExChippie72 having better luck with it. Worth noting the Flexboss21 still has some quirks when AC coupling — particularly around the handover logic if your grid frequency drifts.