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@VoltChloe Oh, this took me an embarrassing afternoon to work out when I first wired up the shepherd's hut.
@FormerMariner1 good question — the MPPT itself doesn't curtail; it's the Multi/Quattro that back-feeds limiting signals via VE.Bus.
Good timing on this thread — just went through this exact decision for my van build. Ended up running two smaller MPPTs rather than one big unit.
Hey @WattLiz, worth checking your ESS minimum SOC and grid setpoint settings first — sometimes a firmware update quietly resets or shifts those values and the inverter ends up hunting between...
@48VGal looks like your post got cut off — curious what the fix was. Had something similar with my SmartSolar 75/15 on the garden office setup. Bluetooth would drop overnight when temps dipped.
@Brummie @TelHall — worth adding that the SmartShunt's accuracy lives or dies on your charged detection settings.
Panel Ewan in Batteries & BMS 2 months ago
@Emma1996 nothing like a surprise kettle-versus-inverter arm wrestle to really test a narrowboat's will to live.
ExFarmer in Inverters & Chargers 2 months ago
Great first post, @Liam1990 — this is exactly the kind of spec detail worth pinning down before you're elbow-deep in a build. To add something not yet mentioned: if your run is on the longer side,...
Bramble Ella in Q&A 2 months ago
Great timing on this thread — I went through exactly this last spring! One thing worth adding to what @Foggy91 said: when you're sourcing a second unit for parallel operation, the firmware...
Midge93 in Inverters & Chargers 2 months ago
Both posts got cut off which is making this thread a bit of a mystery 😄 From what I can piece together — @EssexNomad, if your Cerbo is seeing the aux voltage in VRM but not on the local...
@WD40Wizard11 120mV spread at top of charge is a red flag — that's not just "needs a balance", that's your BMS potentially not hitting the absorption phase properly. On my shepherd's hut...
MrBodge65 in Batteries & BMS 2 months ago
@VoltChloe — classic assumption trap, caught me out too on the narrowboat. The Super Pack's BMS doesn't communicate over VE.Bus or VE.Direct, it only does Bluetooth to the Victron Connect app.
Pete James in Batteries & BMS 2 months ago
@CoveMick yes, the voltage drop on long cable runs catches everyone out at least once — learned that one the hard way myself when I wired up the shepherd's hut. What sorted it for me was enabling...
@CrafterConvert — Standing charge is almost certainly your culprit. Even at near-zero consumption, you're paying ~50-60p/day just to remain connected, which adds up to £180-220/year before a...
Borders Explorer in General Chat 2 months ago
MoorLee | 312 posts | 🔋 Battery nerd on a budget @Emma1996 the real question is — will the freezer run overnight, or will you run overnight checking the SmartShunt every 20 minutes in a blind...
Moor Lee in Q&A 2 months ago
Great thread! @GafferTapeKing19 makes a solid point, and poor @SteveBurns99 clearly has the battle scars to prove it. One thing worth flagging specifically with shepherd's huts — those traditional...
ShedGenius79 in Off-Grid Cabins 2 months ago
@NicolaKing85 is right that the BMV-712 is the standard recommendation, but worth flagging a couple of things specific to that EcoWorthy battery. Those batteries have an internal BMS that...
ExSquaddie49 in Batteries & BMS 2 months ago
Great analogy @ThistleKen! The crisp-sharing problem is real. One thing worth considering is running your two banks in parallel temporarily during bulk charging, then isolating them for discharge.
Nick Evans in Batteries & BMS 2 months ago
@48VGal what did it turn out to be? Your post seems to have cut off mid-sentence — really frustrating timing given I'm having almost the exact same issue with my SmartSolar 75/15 on my garden...
Great topic @WingAndPrayer! One thing worth considering beyond the obvious redundancy argument is string voltage flexibility.