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@BodgeItAndScarper the transfer relay question is a fair one — most write-ups do skip it entirely. With the Multiplus-II the built-in transfer switch handles most use cases cleanly, but the timing...
@MarineGeoff one thing nobody's mentioned yet — check whether the Lynx Shunt is actually measuring the right battery bank.
LiFePO4Nerd in Q&A 2 months ago
@MandyGrant yeah had this exact thing on the narrowboat. Switched from PWM to a Victron SmartSolar MPPT and suddenly the numbers made sense again.
@SparkySparky classic diversion relay setup is what you want here. The Victron SmartSolar has an internal relay you can configure to trigger only when absorption/float is reached — essentially...
@RetiredNurse 4 metres is enough to cause real grief, especially if you went with undersized cable to save a few quid at the time. Worth adding — if you're running a SmartSolar, enable battery...
@SolarKeith the PowerAssist threshold rabbit hole is a real one — spent a whole weekend moored up on the Llangollen canal last November convinced my MultiPlus was dying, turned out VEConfigure had...
@EmmaEdwards82 is on the right track — but the real question is whether your genny can actually handle the Multiplus's inrush without the voltage sag making it throw a wobbler and disconnect...
Rob in Inverters & Chargers 2 months ago
@OffGridDawn the M10 connectors are the real killer for me. Running a static caravan setup and had to bodge Anderson connectors onto the output terminals because the IP65 range just doesn't play...
Great shout from @CotswoldCruiser — worth also checking which CAN profile your RahVolt is actually broadcasting.
Gazza55 in Inverters & Chargers 2 months ago
Seen this exact thing on my shepherd's hut setup. Before diving into cell-level stuff, check your BMS discharge/charge temp sensors aren't reading funny — mine was throttling hard because a sensor...
Anne Watson in Batteries & BMS 2 months ago
@PartnerProject nailed the chemistry question — but while you're figuring that out, stick a proper clamp meter on your negative terminal overnight and actually measure the parasitic draw, because...
OldSailor in Batteries & BMS 2 months ago
@NeilEdwards the bit @DodgyRoamer hasn't finished saying is that LFP cells genuinely cannot safely accept charge below 0°C without causing lithium plating on the anode — permanent, cumulative...
@DownsWanderer — great first post, jumping straight in with a proper technical question rather than just "hi I'm new" 😄 Had something similar on my boat setup a while back.
Been running almost the exact same stack on my cabin for three years now — started with a Pi 3B+ but after one too many SD card deaths I moved everything onto a Pi 4 with an SSD boot drive.
@PanelEwan I've been looking at the B2B route myself actually — currently running a 200Ah Fogstar lithium in the leisure bank and the alternator contribution on short runs is negligible.
@SolarDoug — yes, DVCC behaves absolutely fine in my experience. The "LG RESU" label is purely cosmetic; what matters is whether the Pace BMS is correctly negotiating charge parameters...
Devon Dweller in Batteries & BMS 2 months ago
@OffGridDawn - hit this exact wall last year setting up my garden office system. Had two IP65s running completely blind to each other, temperature compensation just guessing independently on both...
@PikeTom the cruel irony is that the less you use the grid, the worse your unit-rate-to-standing-charge ratio gets — you're essentially paying £250+ a year just to keep the cable plugged in like...
DuctTapeDave in General Chat 2 months ago
@ExFarmer90 What transfer relay did you end up using? That's always the bit people gloss over in write-ups and then wonder why their shore power switching is sluggish or the Multiplus throws a...
The IP67 12/25 defaults to a 14.4V absorption voltage out of the box — perfectly fine for most lithium, but Redodo's BMS is notoriously twitchy about charge termination current; if you haven't set...