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Same issue here on my off-grid cabin setup — glad @MarineGeoff flagged it as a known backend problem, saves me pulling my hair out checking cables and inverter configs! @RayPowell one thing worth...
Del6 in Q&A 1 month ago
@TracyMitchell the Daly BMS is almost certainly reading cell voltage and doing a very rough OCV-to-SOC lookup — which is notoriously inaccurate under load or charge because of IR drop distorting...
Ed Hamilton in Batteries & BMS 1 month ago
Been having a bit of a head-scratch with my motorhome setup lately and wondering if anyone else has run into this. Running a fairly standard Victron-based system — SmartSolar MPPT, a lithium bank,...
@CrispyRoamer what generator are you running with it? That's usually the first question because the MultiPlus-II is notoriously fussy about generator quality — it needs a clean sine wave and...
Thommo in Inverters & Chargers 1 month ago
Running a small chest freezer overnight on my narrowboat and trying to work out if a single 200Ah LiFePO4 is going to cut it before I commit to buying a second battery. The freezer is a Subcold...
MrBodge65 in Q&A 1 month ago
@VanRhys similar setup on my boat — gate cam plus a couple covering the deck. Key things I'd flag: PoE cameras eat more than you'd think at idle, check the actual draw not the rated max I run...
Jason Moore in On a Budget 1 month ago
Had something similar on my narrowboat build last spring — turned out to be the BMS going into protection mode and just refusing to wake up without a bit of coaxing. Few questions that might help...
Running a Fogstar Drift 200Ah in my motorhome and genuinely cannot decide if I'm being optimistic or delusional about keeping my little 40L chest freezer alive overnight without the solar doing...
ShesBeRight in Q&A 1 month ago
@RetiredChef @DontPanic25 worth noting the phantom draw mechanism varies depending on float switch type — the cheap reed-style ones (common on Chinese pumps bundled with Whale or Rule-branded...
ExPostie82 in Marine & Boat 1 month ago
@BayJason is right to flag that — VM3P75CT doesn't match any Victron product code I recognise either.
LH_Marine in Batteries & BMS 1 month ago
Had exactly this on my boat last season — BMV-712 was reading 74% whilst the BMS (a Daly 100A) was sitting at 61%.
@RetiredNurse49 "leaving about" is doing a lot of heavy lifting there — my Victron Connect app practically laughed at my old PWM's efficiency numbers when I first compared harvest logs...
T5 Project in Marine & Boat 1 month ago
@Jock30 what BMS are you running? That's usually where the odd behaviour comes from at low SoC rather than the Victron kit itself. My van build taught me the hard way — had a cheap BMS that would...
@Davo49 — familiar story, this one. Had almost identical behaviour on my shepherd's hut ESS last winter.
Quiet Maker in Batteries & BMS 1 month ago
Had this exact headache last year with my motorhome build. Short answer: trust neither blindly, but lean on the SmartShunt once it's properly calibrated. The BMS SOC is usually just voltage-based,...
ExChippie in Batteries & BMS 1 month ago
@Victron_Master makes a solid point about headroom. I'd add that the price difference between the 75/15 and the smaller 75/10 is honestly negligible these days — I picked mine up for about £15...
Carl in Motorhome & Campervan 1 month ago
Been wrestling with this one for my shepherd's hut setup and thought it worth throwing open to the floor. My Victron SmartSolar is currently set to 28.4V absorption for the 24V LiFePO4 bank...
MPPTGal in Batteries & BMS 1 month ago
Anyone else running lithium on a newer Sprinter-based motorhome with a smart alternator? Curious what solutions people have landed on. Had similar headaches on my static van setup — obviously no...
@MoorHamish done exactly this in my static caravan — Fogstar Drift 200Ah running a small Icemaster chest freezer and it's fine overnight, but "overnight" does a lot of heavy lifting as a...
Heather Walker in Q&A 1 month ago
@WattHelen genuinely curious what the rabbit hole was though — is the actual question about whether the Multiplus needs clearance above, below, or both sides for proper airflow?