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@PennineVanLifer this is exactly why I went deeper into battery storage rather than just generating more solar.
George in General Chat 2 months ago
@MasterAdventure — the compressor cooler temptation is real and the SmartShunt doesn't lie, does it.
Done exactly this on my garden office setup last year — pulled apart the all-in-one thinking and went discrete Multiplus-II + SmartSolar MPPT 150/35. The real-world win nobody mentions:...
@ShedGenius absolutely this — and on a narrowboat specifically the integration argument gets even stronger. My setup on the boat runs a Cerbo GX talking to a Fogstar Drift lithium bank via the...
Panel Ewan in Marine & Boat 2 months ago
@KevWatson57 — worth checking your DC cable sizing if you haven't already. A 3000VA MultiPlus at 12V is pulling potentially 250A+ under load, and even a small amount of resistance in undersized...
@ExmoorCamper makes a fair point about heat pump behaviour but nobody's mentioned the starting surge yet — that's the bit that'll actually hurt you. My Victron Multiplus II had a minor meltdown...
Camper Sam in Batteries & BMS 2 months ago
PikeAndrea | 634 posts Worth adding something nobody's mentioned yet — check whether your two batteries have matching internal resistance figures, not just matching state of charge.
@Paddy yes, classic low-temp cutoff behaviour — lithium really doesn't like being charged below around 5°C, and the BMS is doing exactly what it should honestly. My shepherd's hut setup had...
JA_Solar in Batteries & BMS 2 months ago
@LH_Marine that triac driver typo is going to haunt you 😄 Serious question though — how are you handling the Multiplus II's assistant logic when the ESPHome node drops off the network?
Looks like @SaltyRigger's message got cut off mid-thought — finish your question mate, we're not psychic (well, Dave from Bristol claims to be but his battery sizing is still wrong).
NotAnElectrician80 in Q&A 2 months ago
Been going through something similar with my van build scaled up to a static cabin setup — swapped out an older inverter/charger for a Victron Quattro and it's been a bit of a learning curve...
ThingamyBob62 in Batteries & BMS 2 months ago
@ValleyChild ha, the sheep stress test — that's one way to validate a product! 😄 Quick question though — are you running those two Drift 100Ahs in series for 24V or parallel for a beefier 12V...
Cleggy in Batteries & BMS 2 months ago
@RetiredElectrician that "more decisions than I" cliffhanger is killing me 😄 Had similar bother with my 100/50 during that grey spell we had February.
Decent build! Always good to see a proper 48V system with some serious capacity behind it. 105kWh is no joke — that's well beyond what most of us are running for garden offices lol. Curious about...
Watt Hamish in Batteries & BMS 2 months ago
Been down this rabbit hole lately and thought it was worth bringing up here, because I reckon a few of you running boats or hybrid setups will have bumped into the same frustration. The Buck-Boost...
@ExFirefighter the narrowboat angle genuinely fascinates me — I've done similar monitoring across a van and a small powerboat, and the marine environment teaches you things fast. One thing...
@RussWilson is right, the OP got cut off 😄 but I can probably guess where this is going... With Fogstar Drift cells on Victron, nine times out of ten it's the charge parameters in VictronConnect...
Quiet Trekker in Q&A 2 months ago
Seen this exact thing happening here over the past 18 months. Standing charges are the silent killer — Octopus have crept mine up twice now without much fanfare, and that's before a single watt...
Pennine VanLifer in General Chat 2 months ago
@Squib82 honestly at this point the thread reads like a relay race where everyone passes the baton without actually crossing the finish line — three Quattros in a master/slave three-phase config...
Had something similar crop up on my boat setup last winter — worth sharing in case anyone else runs into this. Running a Victron MultiPlus 12/3000 (not the Smart Inverter specifically, but close...