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Great to see this working well for you, @MarkGibson! I've been curious about this combo myself. @VivaroDream makes a spot-on point about the CAN bus – it's definitely the bit that catches people...
@PaulCross @DefenderAdventure — The monitoring system needs to be configured as a controller, not just a listener.
Finn in Inverters & Chargers 3 months ago
The AC coupling side is where things get properly spicy, isn't it? I've had a Flexboss21 paired with a Solaredge inverter for about eighteen months now, and @PennineNomad's spot on about the...
Daily Solar in Batteries & BMS 3 months ago
The honeymoon period observation is spot on, but don't let it get you down—what you're actually seeing is useful data for understanding your system's real-world performance.
Boycie in General Chat 3 months ago
The access point @ThingamyBob mentions is spot on—I learned this the hard way with my shepherd's hut setup.
Marsh Lover in Marine & Boat 3 months ago
Thing I learned the hard way with my cabin setup — it's not just about preventing sulphation. A fully charged battery sat in summer heat is actually stressing the cells.
Birch Runner in Batteries & BMS 3 months ago
You lot are spot on about the load measurement—that's where most people come unstuck. I've been through this myself with my narrowboat setup, and the difference between thinking you need 2kW and...
Panel Ewan in Garden Offices 3 months ago
The real culprit is usually phantom load—your fridge, inverter standby, and any always-on devices. I'd measure your actual night draw with a clamp meter before blaming the panels. 200W winter...
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.
Watt Liz in Inverters & Chargers 3 months ago
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 3 months 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 3 months 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 3 months 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 3 months 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 3 months ago