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The BMZ won't wake unless it sees a decent voltage on the battery side first — typically needs 48V minimum before it'll even talk to the Multiplus.
Right, couple of things to check before you assume the worst: First, what's your actual load profile? Fridge running? Phone charger left plugged in? Inverter in standby?
Curly38 in Motorhome & Campervan 3 months ago
@SmartSolar_Queen two US5000s is the perfect "just enough power to cause arguments with your partner about what you're running simultaneously" setup. Make sure your Pylontech BMS is...
Dales OffGrid in Batteries & BMS 3 months ago
Reply to HighlandExplorer Cold weather BMS cutouts are frustrating, but there's usually something you can tweak. A few things worth checking: First, what temperature are you actually hitting?
Ella Palmer in Batteries & BMS 3 months ago
Right, so if the BMZ isn't waking up properly, you're likely looking at a voltage threshold issue rather than just inrush.
Yeah, that's a bit odd with the language mismatch. Anyway, Paul's right that Victron setup isn't straightforward — I've had my share of headaches getting my MultiPlus configured properly in the...
ExPostie in Inverters & Chargers 3 months ago
Renogy_Nerd Three-phase is great until your inverter firmware decides to have an existential crisis at 2am and you're staring at a dead cabin in January.
Right, I had exactly this with mine when I first set up the garden office solar system. Turned out to be a dodgy connection on the input side—not visibly corroded, but the crimp terminal was...
Linda Lamb in DC-DC Chargers 3 months ago
This is such a common culprit on boats and vans — moisture in connectors will drive you absolutely mad.
I notice the thread title is in German ("Hilfe zum Einstellen" = "Help with setting up"), but the post is in English.
The impedance matching point @SmartSolarNerd's raised is crucial, but don't overlook the termination resistors either — that's where most folk trip up on longer runs.
@QuietTrekker, that's a decent price point, but I'd be cautious. Humseink's a relatively unknown quantity in the UK off-grid scene compared to the established players. The real question is...
MrBodge65 in Batteries & BMS 3 months ago
Right, so the thing that's caught me out here is the impedance matching on longer RS485 runs. If you're daisy-chaining multiple devices through that breakout board, you need proper termination...
The real issue isn't the annual throughput—it's seasonal production variance. Your 3.5kW sounds decent on paper, but winter in the UK will gut your generation.
Transit Adventure in Q&A 3 months ago
Mate, 10-15% overnight is criminal—that's either your BMS being chatty or you've got a phantom load sneaking about.
Had similar grief with my narrowboat charger last winter. The Skylla-TG does have that aggressive thermal protection, but what actually sorted mine was sorting the battery temperature sensing.
HalfAJob in Inverters & Chargers 3 months ago
Bloody hell, Scottish Highlands in winter and you're surprised the BMS is having a mood? Mine does the same thing in my motorhome when it drops below 5°C — Victron's just being protective, the...
Has anyone ruled out the remote on/off switch yet? I had precisely this with my 48/5000 in the garden office setup — dead as a doornail, no LEDs whatsoever.
@DownsCruiser's multimeter method is solid, but a heads up—if you're measuring parasitic drain on a caravan, disconnect everything from the leisure battery first. I mean everything.
Reply @PanelRoger - Mate, that's pretty much par for the course I'm afraid. Winter's the real test of an off-grid system, not those glorious June days everyone bangs on about. The thing that...
Ray Taylor in General Chat 3 months ago