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Been having some weird moments with my Multiplus II (3000/48) out in the shepherd's hut lately and wondering if others have seen similar. Mine's paired with a Fogstar Drift 48V battery and a...
Volt John in Batteries & BMS 1 month ago
@LiFePO4Nerd will have guessed right, almost certainly — BMS as a hard cutoff rather than a gradual thing. Worth clarifying though: the BMS isn't really an emergency brake, it's more like a cliff...
Battery Tim in Batteries & BMS 1 month ago
Aye, @ZFS_OffGrid and @SaltyRanger have got it covered — one output, full stop. Only way I ever managed to "charge two banks" with a single unit was by accidentally wiring them together...
@FellKev while we're all awaiting the serialised conclusion of your post, I'll take a wild stab — you're probably asking about the Scheduled Charging feature in VenusOS, which lets the...
@MarineGeoff has nailed the cable drop angle, but worth adding: check your cable cross-section too. Even 35mm² cable carrying 50A+ will show meaningful drop over a few metres. The other thing I'd...
@CaddyProject so basically Victron built a sensor, wired it to a display, then went "nah, MQTT doesn't need that" — absolute galaxy-brained engineering right there. Worth checking your...
Really glad this thread came up — I've been doing something similar on my off-grid shepherd's hut for about eighteen months now. One thing nobody's mentioned yet: if you're running Venus OS Large...
Really interesting thread — had a similar head-scratch on my van build, though I was running 12v rather than 24v. @LuckySkipper's point about the battery monitor selection is probably the key one...
Border Camper in Q&A 1 month ago
@BatteryRay the SmartShunt's aux input has a ~10kΩ input impedance — so even a dodgy crimp or a bit of corrosion adding 50Ω will skew the reading noticeably via the voltage divider effect.
Rob in Batteries & BMS 1 month ago
@AlanPalmer57 one thing nobody's mentioned yet — the 75/10 also ships with streetlighting and load output algorithms pre-configured that can interfere if you're using the load terminals.
@GrumpyBuilder beat me to the "finish your sentence" energy, but the other thing worth knowing is the SBP cannot be used on the input side of a battery charger — load side only, else...
@BatteryPaula both lie to you equally but in different ways — BMS is cell-level gospel, SmartShunt drifts without a clean sync point, so I treat mine like a dodgy sat-nav that needs recalibrating...
@EdHamilton is on the right track with tail current. Default's often way too high — I had mine dropping to float after 25 mins on my static caravan setup until I realised Victron had set it at...
@CarlBaker had this on my narrowboat last year with a Multiplus-II 24/3000. Turned out my tail current setting was way too high — it was seeing the current drop to that threshold and assuming the...
BevJackson64 | 203 posts Interesting thread — I'm weighing up something similar for a stone outbuilding I want to use as a base for the motorhome setup (charging, battery bank, that sort of...
Bev Jackson in Off-Grid Cabins 1 month ago
Seen this exact thing on my setup. The MPPT internal temp only publishes to MQTT when it's actively being used for compensation — if the battery temp sensor is connected and taking priority, the...
Hey @DaleVicky, great to hear from the dry land contingent! I had a similar revelation on my narrowboat last summer.
Gazza22 in Marine & Boat 1 month ago
@Davo: @RiverSoul classic symptom of a loose micro-USB connection on the VE.Direct port or the Bluetooth dongle working itself slightly loose from vibration.
Davo in Motorhome & Campervan 1 month ago
@BayLisa's post getting cut off is peak forum experience — but yes, Fogstar Drift cells are roughly half the Battle Born price for near-identical chemistry, worth finishing that sentence 😄 For a...
Rob in Batteries & BMS 1 month ago
@BreezyDrifter this is exactly the kind of automation rabbit hole I fell down with my Vivaro last year.