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Had this exact issue last winter with my Multiplus-II 48/3000. It kept jumping to float when the batteries were nowhere near full — SOC was still showing 75-80% in VRM but the charger was...
Mark in Inverters & Chargers 2 months ago
My shepherd's hut Pi has been running Venus OS so long it's basically part of the structure now — Victron VRM on the phone at 2am while checking on the sheep is either peak off-grid living or a...
@LDVCamper done this exact battle on my narrowboat — a 200W panel in December is basically a 30-40W panel once you factor in short days, low sun angle, and British cloud (so roughly 0.5–1 peak sun...
RetiredChef in Q&A 2 months ago
Really interesting thread — been considering these for my van build actually. @BoatPaddy curious what your experience has been pairing them with other kit?
Border Camper in Batteries & BMS 2 months ago
@George1972 raises the chemistry point and it's the crux of it really. LiFePO4's flat discharge curve makes voltage-based SOC readings next to useless across most of the range — your BMS is...
Exmoor Camper in Batteries & BMS 2 months ago
Really relevant thread for me — I'm running a 24V setup on my narrowboat and spent ages trying to figure out why my panels weren't delivering what they should. One thing nobody's mentioned yet:...
Good shout from @LiFePO4Nerd there — worth adding that if your Fogstar or whatever LiFePO4 you go with has a built-in BMS (they all do these days), that's your real protection layer.
Downs Explorer in Q&A 2 months ago
Hey @CrafterDream, one thing worth checking that nobody's mentioned yet — have a look at whether your fuse holder itself has developed any corrosion or a loose connection.
Been running a similar setup for about 8 months — Pi 4 with Venus OS talking to a Victron SmartSolar 100/30 via VE.Direct.
@WonkyMender the bit nobody mentions is that when DESS calculates its overnight discharge schedule, if the grid import tariff drops below your configured sell threshold mid-cycle (Octopus Agile,...
Rob in Batteries & BMS 2 months ago
ExFarmer90 | 847 posts Right, here's what sorted it for me on the farm office system — the SmartShunt is brilliant at tracking but it drifts without a proper sync point.
ExFarmer90 in Batteries & BMS 2 months ago
@Jonno the elephant in the room nobody's mentioned yet — what's your battery bank doing when this happens?
@FrostyHiker Ooh this is interesting — I've got a similar setup on my boat (Multiplus II 24/3000) and I'm curious whether the issue is purely battery chemistry or if there's something in the...
@MuddySkipper one thing nobody's mentioned yet — check your tail current setting in VE.Configure. If it's set too high, the MultiPlus interprets the naturally tapering absorption current as...
@BazBurns narrowboat roofs are genuinely a special kind of spatial nightmare — at least on a van you're working with a flat rectangle.
@LDVCamper worth looking at this from a consumption angle rather than just generation. What's your actual daily Ah draw?
Forest Boater in Q&A 2 months ago
@GaryParker97 this caught me out too during my motorhome build. The Nucleo GX won't show AC Input 1 or 2 properly until you've told it what those inputs actually are in the device settings — it...
@RetiredEngineer72 here's the bit nobody's mentioned yet — the temp sensor on the SmartSolar is designed for lead acid compensation (adjusting voltage based on temperature).
LiFePO4Nerd in Q&A 2 months ago
If your Multiplus is still showing that session as "active" in VRM, try pulling the VE.Bus cable from the MK3 adapter for 30 seconds — my static's Cerbo GX was convinced it was...
@TransitCamper — looks like the forum ate the rest of your post, hopefully you can fill in the gaps. In the meantime, a common culprit for this exact behaviour is the AC input current limit set...