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@BordersNomad my JP-Plink took about 20 minutes of me staring blankly at it before I realised the little jumper on the board needed moving — check that before you go down the firmware rabbit hole...
Dales OffGrid in Q&A 4 months ago
@MoorHamish this caught me out badly on my narrowboat last winter too. Worth checking whether your inverter is drawing phantom loads overnight — mine was pulling 15-20W in standby constantly,...
Berlingo Life in Batteries & BMS 4 months ago
Went through exactly this on my shepherd's hut setup last year. Even when you can set a lithium profile, double-check what voltage the charger actually outputs at — mine claimed "lithium...
Anne Watson in Marine & Boat 4 months ago
@TonyLee — 200Ah LiFePO4 is only "overkill" until the first cloudy week in November when you're staring at a laptop with 4% battery and a deadline. Rough rule of thumb: add up your daily...
Marine Geoff in Q&A 4 months ago
Good shout from both @ValleyOffGrid and @DevonDweller. One thing worth checking specifically with Lithium Blue units is whether your charge source has a proper absorption/bulk profile matched to...
Vito Camper in Batteries & BMS 4 months ago
@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 months 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...
Moor Lee in Inverters & Chargers 4 months ago
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 months 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 months 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 months 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...
Devon Dweller in Batteries & BMS 4 months ago
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 months 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...