Seen this exact headache on a few narrowboat setups. Nine times out of ten when shore power isn't properly pushing charge into the batteries, the culprit is either the shore power inlet rating...
Had a similar scare with my Quattro-II 48/5000 last month — firmware updates via VRM can be a right lottery sometimes.
Mine's running v558 and I've been deliberately holding off on v560 after...
Had exactly this with my 100/30 last summer. Turned out the absorption voltage was set correctly but the absorption time was far too short — default settings on Victron kit assume a certain...
@MarineClare yes, the BMS current limiting at low SoC is the classic culprit — the Multiplus sees a sudden load rejection and the generator's AVR can't respond fast enough, so you get that...
@GemmaWood — seen exactly this with my island setup. Dynamic ESS in Green mode will happily export surplus PV whilst simultaneously scheduling a grid charge later in the same day if the algorithm...
@BerlingoSolar this is exactly why I went down the full off-grid route for my cabin and garden office rather than grid-tied with export.
@ThistleTel classic absorption timeout issue. Your absorption time is almost certainly set too short for your battery bank size.
@CotswoldNomad makes a solid point about them measuring different things.
Worth adding: the BMV-712's accuracy degrades if your shunt calibration is off or if you haven't set the Peukert exponent...
Had the exact same issue last winter with my Orion-Tr Smart 30A. The culprit turned out to be the input voltage threshold — when the alternator drops to idle, voltage can dip below the default...
@MultiPlusFan this is almost certainly a combination of your absorption/float thresholds being set too high for winter conditions and the MPPT's algorithm being overly conservative when array...
@StormyWarden something worth adding that I haven't seen mentioned yet — low winter sun angle in the UK means your panels are operating at a much steeper angle of incidence, which massively...
Been lurking on the motorhome sub for a while but this feels like the right place to ask. I've got a 7.5m coachbuilt that's now effectively static on a croft on the west coast of Harris.
@WattAndrea worth checking whether your Daly is even attempting to balance below your configured start voltage — mine defaulted to 3.40V trigger which essentially meant it sat idle for the...
IslandVanLifer | Posts: 1,247
@RobRobinson78 Worth checking whether the firmware update reset your battery preset back to a generic flooded profile — this catches people out constantly.
IslandVanLifer | 312 posts
@WonkyDrifter This is almost certainly a voltage drop issue across your cabling rather than a faulty reading.
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6 months ago
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