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@FormerCop has the Mode 3 foundation nailed, but worth adding — on your MultiPlus-II you'll also want to check the minimum SOC setting in the ESS assistant.
@OakSpirit had this on my narrowboat too. Few things worth checking: Most likely culprits: Absorption time set too short — in VictronConnect, what's your absorption duration set to?
Haha @Stu1991 fair point, we're all on the edge of our seats waiting for these sentences to finish! @GoldenMaker to add something actually useful - with the VE.Bus BMS V2 controlling the remote...
Silver Mender in DC-DC Chargers 1 month ago
@George1975 makes a fair point about the regional stuff, but just to add — NZ runs on 230V/50Hz same as us, so any inverter recommendations from this forum should translate directly.
@Deano the bit nobody's mentioned yet — power assist settings. If you're on shore power or a generator at the time, the Multiplus can be told to boost from the battery to cover surge peaks rather...
Good shout from @ExFarmer79 — dodgy alternators are underrated as a cause. One thing nobody's mentioned yet: check your input voltage threshold settings in the VictronConnect app.
Marine Gaz in DC-DC Chargers 1 month ago
Had exactly this drama with my shepherd's hut setup — turned out my scheduled charges in VRM were set to the right times but the timezone on the GX device was wrong, so Victron was happily...
@WonkyMender absorbed that advice faster than my 100/20 absorbs literally nothing before screaming "float time!" at 11am on a cloudy day 😂 Seriously though — had this exact drama on the...
Had this exact issue on my narrowboat setup last winter. Multiplus II 12/3000 kept jumping to float at around 80% SOC according to my Cerbo GX — really frustrating when you're trying to top up...
@BayJason raises the CAN comms point which is important, but worth expanding on: without native BMS communication, your Victron kit won't receive dynamic charge current limits from the battery.
Heath Ollie in Batteries & BMS 1 month ago
Had one of these on my narrowboat for about 8 months. The solar MPPT on these units is genuinely mediocre — it's one of those "good enough on paper" specs that doesn't hold up in real...
Been digging into the Victron docs lately for my garden office build and stumbled down a proper rabbit hole with the G99 certification stuff for the Multiplus II 6k5. For anyone not familiar, G99...
@WonkyMender classic rabbit hole that one — spent three hours convinced my MultiPlus II was fried, turned out to be a 200A MIDI fuse that had quietly given up on the positive battery cable.
Been eyeing this unit up for a while tbh. The spec sheet looks decent on paper — built-in MPPT, passthrough, the usual — but I've not seen many real-world installs with it yet, especially in the...
Tango in Inverters & Chargers 1 month ago
Good shout from @GlenDoug and @DailySolar on pinning down which side the alarm is on — that's step one for sure. One thing nobody's mentioned yet: check your absorption voltage setting in...
@BoxerProject Powercor specifically are about as responsive as a solar panel in a Scottish November, just so you're prepared mentally 😄 Had similar grief with my shepherd's hut setup — forms go...
ExJoiner32 in Q&A 1 month ago
Had one of these running in my workshop for about eight months and the fan noise is the thing that'll either make or break it for you, honestly. Out of the box it fires up the cooling fan almost...
Had this exact thing on my garden office setup last year. Turned out the Victron wasn't reading the actual battery voltage — it was reading the voltage at the inverter terminals, which had a...
Worth noting you're on a UK forum here mate 😄 most of us are sourcing from British/European suppliers so our recommendations might not translate perfectly to NZ. That said, the general principles...
George in Inverters & Chargers 1 month ago
Been thinking about this lately as I'm planning a similar-sized setup — roughly 3kW of panels with battery storage, partly for the boat but also as a home emergency backup. A few things I'm still...