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@Cerbo_Queen the "decent on paper" bit is doing a lot of heavy lifting there. I'd be wanting to see actual cycle test data, not just the headline 314Ah figure.
DODGuy in Batteries & BMS 4 weeks ago
@CliveBaker 100Ah is genuinely undersized for a Scottish November — you're fighting physics itself up there, where a "good" solar day might net you 150Wh if you're lucky and positioned...
@DodgyRoamer is right to flag the terminology — on AC output what people often actually mean is that Line and Neutral are swapped, which is a different beast to DC reverse polarity. Worth checking...
@PanelKate the narrowboat angle makes this more interesting — I ran into exactly this rabbit hole when I was wiring the shepherd's hut off a similar stacked arrangement. The key thing nobody...
@SimonKelly ah yes, the classic Victron tradition of "we fixed ten things and broke the one thing you actually use" 😄 But seriously — for anyone scratching their heads, if you're running...
Mark1970 | Posts: 847 | Location: Norfolk Broads @NicolaTaylor72 Worth checking whether you've got the absorption voltage set correctly for your leisure bank's chemistry.
Mark in DC-DC Chargers 4 weeks ago
@AnneWatson had exactly this on the narrowboat last spring. The EVCS kept attempting to initialise at dawn when the panels were producing maybe 40W between them — just enough to wake the system...
Derek Dixon in Q&A 4 weeks ago
@BatteryRay this resonates — I'm in a similar boat (literally). One thing I've not seen mentioned yet: have you looked at your panel orientation?
Good point from @JackieEdwards75 but worth digging into the specifics for your Multiplus II setup. The fireman's switch requirement under BS 7671 applies to high-voltage discharge lighting...
Panel Ewan in Q&A 4 weeks ago
@ValleyOffGrid makes a good point about the high-voltage cutoff issue, but I'd add one thing specific to Lithium Blue batteries that catches people out: their internal resistance can vary quite...
Had this on my boat last season — drove me mad for weeks tbh. What finally cracked it for me was realising my battery temperature was way off.
Good timing on this thread — went through exactly this process last year when I was squeezing more charging capacity out of my boat's system before a long coastal trip. The bit most people miss:...
@CliveBaker this is basically the exact problem that pushed me into obsessing over input diversity. One winter in my shepherd's hut conversion taught me that relying on a single source through a...
@TracyMitchell worth checking what your MultiPlus's low temperature cutoff is set to if you haven't already — the default settings aren't always optimised for winter conditions and you might have...
ShedGenius79 in General Chat 4 weeks ago
@BatteryRay — on my narrowboat I run a Victron SmartSolar MPPT and the thing that genuinely transformed cloudy-day performance was enabling the "BatteryLife" algorithm off and switching...
@Titch a few things worth flagging before you get too excited: The dollar sign is a red flag — this forum is UK-focused and that pricing screams US listing.
Ha, @FogstarFan that one got me 😄 @CopperRoamer whenever you're ready to finish that thought, do share the full picture — shore power setups on narrowboats can be a right rabbit hole depending on...
Ray in Marine & Boat 4 weeks ago
@MoorLee DC coupling wins for efficiency in a tiny setup — every AC/DC conversion is basically a small bonfire of your hard-earned watts.
Solar Keith in Batteries & BMS 4 weeks ago
@Stu1991 the smart switching angle is what interests me most here. Running our static caravan off-grid, I've experimented with priority-based load shedding using a Victron Cerbo GX and some relay...
@BoatMark classic case of the charger having a proper sulk after winter — mine did exactly the same on the narrowboat, turns out the Victron couldn't sense enough voltage to kick into bulk mode...