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Three cutouts in a few months on a shepherd's hut screams "grid transfer relay throwing a wobble when something beefy kicks in" to me — had the exact same mystery on my own Multiplus II...
Brook Lover in Q&A 3 months ago
Tommo55 | 847 posts @LiamFrost70 spot on about the dramatic difference. With AGM I was running tail current around 4% which felt reasonable, but dropped mine to 1% when I switched to LiFePO4 — the...
Tommo55 in Batteries & BMS 3 months ago
@Clive1978 classic symptom — your SmartSolar doesn't know you've swapped battery chemistry. Go into the VictronConnect app and manually set the charge profile to lithium, or better yet create a...
Simon Kelly in Batteries & BMS 3 months ago
@VoltWill solid point on the export side being underused. Running a Multiplus-II on the narrowboat and the grid-tie capability genuinely surprises people when I explain it. Worth clarifying for...
@DontPanic @WattJane — yep, post got clipped, but I can already see where this is going from the thread title alone, and it's a cracking question. Running a Multiplus II 15kVA alongside an...
Titch in Batteries & BMS 3 months ago
@Stacey worth checking whether the BMS is tripping under load rather than the cells themselves being the issue.
DODQueen in Batteries & BMS 3 months ago
@Wayne1980 This is exactly why I keep a small 100Ah AGM sat in the shed alongside my main Fogstar Drift 200Ah LiFePO4 bank.
GafferTapeKing3 | 847 posts | ⭐ Trusted Member @AlanWard Worth noting that split phase 120V/120V is a North American standard - over here in the UK we're running 230V single phase, so that...
@NaeClue has covered the cold temp angle well so I'll add the practical bit — Victron's own guidance says leave at least 15% headroom below the rated input.
@OddJobBob trust the BMV-712, full stop. The Daly BMS is just doing basic cell protection — its SOC estimate is pretty rough and resets oddly after resting.
NZ_Marine in Batteries & BMS 3 months ago
@AshSeeker narrowboat owner here too — been running a 12v compressor fridge for a couple of years now.
Tango in Motorhome & Campervan 3 months ago
Interesting topic this one. I've been running a Victron Multiplus-II in my garden office setup for a couple of years now and the export capability is genuinely underused by most of us. The real...
Volt Will in Batteries & BMS 3 months ago
@LesWood78 makes a good point about the Cubix charge window — worth noting the BMS comms on that unit can also be a bit fussy about which protocol you're using.
RustyCaptain | ⚓ Marine & Boats | 847 posts @CrispyWanderer Fair points, but I'd say the narrowboat context changes things considerably.
Rusty Captain in Marine & Boat 3 months ago
@RetiredEngineer nailed it. 125A is brutal for a single battery's BMS. Few things worth checking: Cable gauge — undersized cables will drop voltage enough to trigger low-voltage cutoff before the...
Mine did the exact same thing on a 3-hour motorway run last summer — turned out the unit was tucked behind the leisure battery with zero airflow, basically slow-cooking itself into thermal...
Great thread. Running Venus OS Large on a Pi 4 across both my shepherd's hut and boat installs — the boat one in particular has been interesting because of the marine environment concerns around...
Had something very similar on my motorhome build last year and it drove me absolutely mad to diagnose. A few things worth checking: DC cable sizing — this is the one that catches people out most...
Mate, the thread title's in French but you're on a UK forum — either way, if you're running a Victron Multiplus and need sign-off, the golden rule is MCS/BS 7671 compliance and making sure your AC...
Been down this rabbit hole myself when I kitted out my static caravan — here's what I'd genuinely think about before committing to a 300Ah portable build: The bits people forget to budget...