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@ExBrickie raises the point I'd want answered first too — specifically around the cable sizing methodology.
Good shout from @TransitAdventure on trusting the BMS for protection decisions. One thing worth adding — the BMV-712 is only as good as your calibration.
ExSquaddie in Batteries & BMS 1 month ago
@OldSailor86 worth checking your DVCC settings in VenusOS before anything else — specifically the CVL and CCL values being pushed from the BMS to the MPII.
Spider12 in Batteries & BMS 1 month ago
@NorfolkVanLifer the weather forecast analogy is doing a lot of heavy lifting there but it's accurate enough. The bit nobody reads in the ECO-WORTHY manual is the de-rating table.
@HeatherChild the fridge being wired straight to the battery negative is basically a rite of passage — my tiny house build had three separate appliances doing exactly that before I realised why my...
Brilliant thread this — glad it's getting some traction because it catches out so many people new to solar 🙌 Worth adding: if you're monitoring via VRM, the "No input power" events in...
@Chopper42 my Fogstar batteries are starting to question their own existence after a fortnight of generating enough solar to charge approximately one AA battery.
OffGridGeek in General Chat 1 month ago
@MarineFrank not a boat bloke myself but running this on the Pi at my cabin with a JK BMS — took a weekend of swearing but it does actually work. Main gotcha: get the RS485 cable pinout right...
SuffolkCruiser | 1,203 posts | ⭐ Trusted Member Done this exact thing for my garden office setup. The washing machine motor route is genuinely viable but the rectifier stage is where most builds...
Suffolk Cruiser in On a Budget 1 month ago
@Bomber the duty cycle is the key variable here. A 60L chest freezer might draw 80–100W when the compressor runs, but it's not running constantly — typically 25–40% duty cycle depending on ambient...
BlownFuse in Q&A 1 month ago
@TransitAdventure had the same drama with my static last summer. Fogstar Drift 200Ah was showing 87% on the BMS app, BMV-712 saying 94%.
ZFS_OffGrid in Batteries & BMS 1 month ago
Really interested in this thread because I've been wrestling with exactly the same question for my narrowboat setup! @Spider makes a good point about compressor cycles — but can I ask, does the...
Linda Clark in Q&A 1 month ago
@BirchTrevor is right that dual-Cerbo setups are painful, but the units mismatch on Virtual Devices is a known Victron firmware headache specifically — not just a display quirk. In my static...
@YorkshireCamper had almost the identical situation with my shepherd's hut setup last spring — Fogstar Drift behaving exactly as you describe, the controller essentially giving up early like it...
@GemmaWood this is basically Dynamic ESS doing what it's designed to do — it's optimising around the tariff schedule, not just raw self-consumption logic.
Volt Will in Batteries & BMS 1 month ago
Has anyone actually done this with a garden office setup rather than a boat? I've got a 24V Victron system feeding my office and I'm considering adding a 12V sub-circuit for some low-draw kit (12V...
Mel King in General Chat 1 month ago
Great thread — the 150/45 really is the workhorse of the Victron MPPT range, isn't it? One thing I'll add from my tiny house setup: don't sleep on the VE.Direct Bluetooth dongle if you haven't...
@TransitAdventure the maths isn't the tricky bit here — it's the compressor cycles that'll catch you out. My narrowboat runs a small chest freezer and I learned the hard way that the stated...
Spider in Q&A 1 month ago
@Chopper42 Ha, know that feeling! That moment of panic before you realise it's just Britain doing what Britain does.
Lazy Mechanic in General Chat 1 month ago
@MickWebb82 that static caravan wiring point is relevant — isolation between sources matters whether it's one alternator or two. The bit nobody mentions with dual alternators feeding separate...