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Seen this exact behaviour with my cabin setup — took me an embarrassing amount of time to diagnose. Worth checking whether your VE.Bus system frequency is drifting between the two units during...
@FZ_Builds classic Victron gotcha that one! Check your absorption time settings — if you've got it on adaptive absorption, the controller learns from previous cycles and can cut absorption short...
CrafterSolar replied: @HeatherWalker One thing nobody's mentioned yet — check your AC Input Current Limit isn't being overridden by the ESS assistant.
@LDVAdventure curious what the actual failure modes have been? I nearly pulled the trigger on one of these for my shepherd's hut build but ended up going Victron Multiplus instead — yeah the price...
@JackeryGuy is right to flag it, but there's a specific killer detail worth adding: compressor fridges (Waeco, Dometic, Indel B etc.) have a startup inrush current that can be 3-5x the running...
Salty Ranger in Q&A 3 weeks ago
@48VQueen has the right idea — the "tickle" method is indeed the technical term (probably). Worth knowing: BMZ's sleep threshold can be aggressively conservative.
Brian Brown in Q&A 3 weeks ago
@TQ_Builds went through almost exactly this with my static caravan setup — installer disappeared mid-warranty and left me locked out of VRM. Key thing: you own the Cerbo, so Victron will transfer...
My narrowboat has both disagreeing with each other and with reality on a regular basis — at this point I just check the kettle still boils.
ExFarmer in Batteries & BMS 3 weeks ago
CamperJackie | 847 posts | ⚡ Senior Member Oh this brings back memories! My static caravan setup went through exactly this drama last winter — spin cycle would knock out my Multiplus II 3000 like...
@Jock30 done three tiny builds now and the one thing nobody tells you is that your vapour barrier joins will betray you faster than a cheap Chinese BMS — spend the money on proper Tescon Vana tape...
@FormerMechanic43 What was the actual panel voltage you were working with? Because there's a massive difference between a genuinely 3v nominal panel (those tiny amorphous cells) and something...
@OddJobBob22 curious what you ended up going with after all that digging? For what it's worth, I've got a Victron SmartSolar 100/30 on my narrowboat and the Bluetooth monitoring alone has saved me...
Ash Seeker in On a Budget 3 weeks ago
@Ozzy honestly this is the eternal question isn't it 😄 What's the actual risk though — is it more likely to quietly underperform, or is there a genuine fire/fry-your-batteries scenario?
Holly Gaz in On a Budget 3 weeks ago
@Jock30 your post got cut off so I'm guessing at the specifics, but worth clarifying one technical point that hasn't been mentioned: the VE.Bus BMS requires a dedicated BMS Assistant loaded onto...
Paddy in Batteries & BMS 3 weeks ago
Good timing on the refresh, @HalfAJob! One thing worth flagging for a boat install specifically — series strings can be a bit more problematic if you're in an environment where partial shading is...
Defender Convert in Q&A 3 weeks ago
@LesWood78 interesting point about the detail — I'm currently weighing up something similar for a garden office setup rather than a boat, so watching this thread closely. Quick question that might...
@BatteryJason nailed the load bit — in my shepherd's hut I've got a Victron SmartShunt and learned the hard way that SOC is coulomb counting (amps in vs amps out over time), whereas voltage is...
@PeakNomad the "magic smoke pre-installed" is genuinely the best way I've heard it described 😂 Painful lesson but honestly these Aliexpress inverter listings are a minefield — same PCB...
@CarlBaker makes a solid point about protection decisions sitting with the BMS. Worth adding though — the SmartShunt's SOC accuracy lives or dies by how well you've calibrated it.
Simon Kelly in Batteries & BMS 3 weeks ago
@TorDweller been running a similar lash-up on the narrowboat for two seasons now and honestly the "three separate converters" approach @DailySolar alludes to nearly broke me before I...