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@LutonBuild ran into this exact thing with my van build. Worth checking your charged voltage threshold in the SmartShunt settings — mine was set to default 13.2V which was triggering a false sync...
Wonky Mender in Batteries & BMS 3 months ago
@ValleyOffGrid been there with my garden office build — condensation under the floor is a proper pain. One thing that helped massively was getting the structure up off the ground properly.
Volt Will in Garden Offices 3 months ago
@CharlieStevens85 raises a crucial point about smart alternators — this absolutely bites people. Euro 5/6 vehicles with variable voltage regulation can drop the alternator output to ~13.1V at...
Tracy Allen in DC-DC Chargers 3 months ago
Relevant to me this — got a similar setup in the motorhome with a Ford Transit base and the smart alternator is definitely doing odd things. Quick question for anyone who's cracked this: does the...
Smithy98 in DC-DC Chargers 3 months ago
@MasterCamper three years of running it and you're pulling out the measuring tape on the toroidal transformer 😄 Most of us are still arguing about cable sizing... But genuinely — the toroidal...
Moor Lee in Inverters & Chargers 3 months ago
@HeatherWalker that's every BMS ever made, to be fair — at least Little Rosie sounds like she'd apologise nicely before taking the whole van down with her.
Dale Lover in Batteries & BMS 3 months ago
Slightly off the main topic but this is really relevant to my shepherd's hut build — I've been agonising over whether to prioritise floor insulation or spend the budget on upgrading from my...
Ewan Chapman in Garden Offices 3 months ago
@JYT_Solar @Kingy — worth checking your tail current setting if you're on lithium. The MPPT drops to float when charge current falls to that threshold, and Victron's default is often set too high...
@ValleyOffGrid gutting when that happens. Worth considering a vapour control layer above the insulation rather than relying solely on what's beneath — moisture migrates upward through the floor...
Dorset Solar in Garden Offices 3 months ago
@VoltWill my Victron kit stops alarming about battery temps once I finally caved and insulated the floor — turns out concrete slabs are basically just fancy cold plates pretending to be floors.
MultiPlusFan in Off-Grid Cabins 3 months ago
@LDVAdventure decent list but I'd push back slightly on jumping to 11.8v being a BMS issue straightaway.
DODGuy in Batteries & BMS 3 months ago
@Spider three months of obsessing before pulling the trigger? Mate, that's basically the off-grid courtship period — you wine and dine the spec sheets, take the datasheets to dinner, whisper sweet...
Moor Lee in Batteries & BMS 3 months ago
@LiFePO4Nerd cell balancing point is the one that bit me — had a rogue cell in my static van bank doing exactly that, whole BMS just threw its hands up the moment Victron tried to push into...
Totally get that feeling @MoorHermit — when I first wired up the narrowboat I was absolutely flying blind.
@PanelMatt worth also checking whether your alternator has smart/variable voltage regulation. Newer Euronorm-compliant alternators (especially on anything post-2015ish) drop output voltage when...
@BurnBen mate the thread title's in Dutch but your problem is very much universal — had the exact same headache in my shepherd's hut where I wanted shore power off but MPPT cracking on...
@ExJoiner19 the boat-to-garden-office crossover is more real than people think — I actually spec'd my narrowboat's 12V system first, then used almost identical logic for a shore-based EV charging...
Gazza25 in Marine & Boat 3 months ago
@DaleBen @SaltyTrekker definitely not imagining it — the usable capacity difference alone makes it feel like you've doubled your bank.
Dale Ben in Marine & Boat 3 months ago
@DodgyRoamer nice to hear a positive update — I've been eyeing these up for my motorhome emergency backup build where I don't want to commit Fogstar Drift prices for something that might sit...
ExTrucker73 in Batteries & BMS 3 months ago
@PeakVanLifer this rings bells from when I was commissioning my tiny house setup on a single Multiplus-II.