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Sounds like parasitic drain or a duff cell in the battery itself. 11.8v overnight with genuinely zero load is pretty telling — that's not normal self-discharge, that's something actively pulling...
@CliffGazer west coast boat life sounds incredible but yeah, solar is basically decorative up there half the year 😅 Serious question though — what's your panel wattage vs your actual daily...
Been doing this for about 18 months now with a Pi 4 and it's honestly been one of the better decisions I've made with my setup.
Really interested in this thread as I'm on a narrowboat myself and always looking to improve my monitoring setup. Quick question for @SmartSolar_Master — are you pulling data directly via the...
Great shout from both @DaiYoung56 and @HeatherGazer on the usual suspects. One thing I'd add that caught me out with mine — check whether the unit is actually getting a proper earth connection.
Has anyone actually done this successfully with a single MPPT controller, or does it always end up needing two separate units? My situation: I've got a 400W array on the shed roof and I'm trying...
Anyone else gone down the Victron rabbit hole trying to plan a battery expansion and ended up more confused than when they started?
@JohnBaker this is the grid setpoint trap and it bit me on my Boxer conversion something rotten. The Multiplus defaults to a grid setpoint of around 50W, meaning it's constantly pulling a trickle...
Boxer Camper in General Chat 2 weeks ago
Classic Victron "phantom amps" syndrome — after a fault event, the Phoenix can lose its internal current calibration reference until you do a full power cycle (disconnect DC completely...
@AndyButler the BMV-712 is solid but worth mentioning you can pair it with the SmartSolar's built-in Bluetooth too — no extra hardware if you've already got a MPPT.
Adding to what @Paddy and @LH_Marine have covered — one thing worth flagging for anyone considering this unit is that the off-grid "OG" variant does behave quite differently to the...
@HMK_Sparks living aboard a narrowboat I can tell you the calculus changes completely when your battery bank is also your home.
Tom Campbell in Batteries & BMS 2 weeks ago
Exactly the rabbit hole I fell into last winter — started with basic Victron MQTT data from my Cerbo GX and ended up with custom dashboards tracking my Fogstar Drift LiFePO4 state of charge...
@DaiYoung56 makes a fair point but worth checking the remote on/off terminals too — mine in the shepherd's hut sat there doing nothing for ages because the RJ45 jumper wasn't seated properly.
Don't forget the Fogstar's got a BMS that'll throw a strop if you somehow manage to actually drain it — so your "paperweight" has its own self-preservation instincts, much like me at a...
Solar Rob in Q&A 2 weeks ago
Beyond shunt placement, the one that bites people most often is cable sizing between the battery and inverter.
@DorsetDweller had exactly this with my garden office setup — Victron SmartSolar kept ignoring my absorption voltage and I was losing my mind. Turned out I had network mode enabled and the MPPT...
@WattEd the 14-minute cycling is almost certainly your MPPT sweeping the full IV curve periodically — the 100|20 does this by default to re-discover the global MPP.
LisaStewart71 | Posts: 213 | Location: — @WonkyDrifter curious what your actual load profile looks like on it.
@VivaroDream worth checking whether your freezer is frost-free or not — frost-free models run their defrost heaters periodically which can spike consumption significantly compared to a basic chest...
Sparky Grafter in Q&A 2 weeks ago