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Had a similar headache when I swapped out my lithium setup for AGM during a BMS fault on my van conversion — the transition from managed lithium (where the Victron ESS just talks nicely to the...
Paula Fisher in Batteries & BMS 3 months ago
Been having the exact same thing with my Fogstar Drift 200Ah in the van — sat at 97% for nearly a week and I couldn't figure out if something was wrong or if that's just… normal? After a bit of...
Volt Vicky in Batteries & BMS 3 months ago
@GoldenGaffer one thing worth flagging before anyone bids — the 12/3000 pulls serious current on the 12V side under full load (around 250A draw).
@NorfolkVanLifer raises something I've seen bite people repeatedly — cable sizing gets done on peak voltage assumptions from lead-acid days, then lithium's flatter discharge curve means you're...
Somerset Nomad in Marine & Boat 3 months ago
Had this exact issue on the narrowboat last summer. Victron SmartSolar 100/30, Fogstar 200Ah lithium, panels doing plenty of current — but it kept declaring absorption done after 20 minutes and...
Good shout from @AnneButler there. One thing nobody's mentioned yet — check your rebulk voltage setting.
@GrumpyDrifter on my narrowboat setup (200Ah Fogstar Drift) I run absorption time at 2 hours minimum — some folks go shorter but I found anything under 90 mins was letting the MultiPlus bail out...
@DevonNomad worth adding a practical cold-weather caveat here — Voc rises as panel temperature drops, so whatever string voltage you calculate at STC (25°C), you need to derate for your lowest...
Bit of a niche one this, but sticking it here because I reckon a few van-to-house crossover folks might have hit the same wall. I've been expanding my setup beyond the van — running a Victron...
Tommo in Inverters & Chargers 3 months ago
@SolarRob spent three weeks arguing with myself about this on the narrowboat before a sparky mate just pointed at the Victron wiring unlimited guide and said "it's in there, mate" —...
Running into something similar with my garden office setup and wondering if others have experienced the same. I've got a Victron SmartSolar MPPT 100/30 paired with a separate battery monitor, and...
Spent three weeks on my narrowboat last autumn doing the Caledonian Canal and this hit me square in the face.
Good timing on this thread — I spent a winter on the cut working through exactly this scenario when shore power became unreliable at certain moorings. What nobody's mentioned yet: if you're...
Right, so picking up where @Taffy's reply presumably got cut off — The key thing people miss with the Multi RS Solar is that frequency tolerance isn't buried in the inverter settings directly.
What @CarlBaker hasn't mentioned — and it caught me out on the narrowboat — is that the digital input's pull-up voltage sits at 3.3V internally.
Sophie Fisher in Batteries & BMS 3 months ago
Spotted this one doing the rounds — worth a closer look if you're after a solid 12V inverter/charger combo. The MultiPlus 12/3000 is a proper workhorse.
Good points all round already covered. One thing worth adding — the Orion-TR Smart has engine detection built in via the input voltage threshold, but if you're running a modern van/tiny house with...
CE_Builds in DC-DC Chargers 3 months ago
Does anyone know whether the low battery warning threshold on the MultiPlus-II can actually be adjusted through VictronConnect, or do you need a full VE.Configure setup via the MK3-USB interface...
@24VGeek this is very much my specialist subject, having nursed a few cells back from the brink in my garden office setup. The key test I always run first is internal resistance measurement — grab...
Clive Baker in Batteries & BMS 3 months ago
@JimWilson good question - the main thing I'd flag with LiFePO4 and hydraulic jack systems like that is the inrush current on startup.
Valley Solar in Batteries & BMS 3 months ago