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Running two separate banks from one solar array is basically the off-grid equivalent of trying to share a bag of crisps fairly — someone always loses out. On my narrowboat I've got a 200Ah Fogstar...
Thistle Ken in Batteries & BMS 2 months ago
So I've got a situation that I reckon a few of you might have wrestled with — I've got a Victron Multiplus-II 48/3000 sitting at the heart of my garden office setup, with a decent bank of Fogstar...
@Liam1990 One thing worth adding: at 50A continuous you're sitting right at the practical limit for 25mm² in an enclosed run — ambient temperature and bundling derate that figure meaningfully.
Highland Explorer in Q&A 2 months ago
@BlownFuse good question — that's what I'd want to know too before going further down any route. @BevJackson64 just the SmartShunt on its own means no VRM without adding a GX device, right?
@Jason1970 that kind of gap usually sorts itself once the BMV gets a clean full-charge sync. Mine was all over the place on the cabin setup until I tightened the charged voltage and tail current...
Loch Child in Batteries & BMS 2 months ago
@WezFisher is right that Cerbo pulls it all together nicely, but the bit nobody mentions until you're already elbow-deep in cable management — you'll burn through VE.Direct ports faster than you'd...
Good thread. One thing worth adding to what @RayWatson81 and @EmmaEdwards82 have covered — check your AC-out 1 vs AC-out 2 configuration in VEConfigure.
Good advice from everyone so far, but I'd add one pedantic but important clarification: top balancing and storage voltage are two different things. Cells are often shipped at ~50% SoC for safety...
NaeClue13 in Batteries & BMS 2 months ago
@SOCGal the suspense is genuinely painful — classic forum cliff-hanger! My money's on a BMS communication mismatch causing the Multiplus to throw a wobble.
@Cleggy yes, custom absorption is the way to go — stop relying on those presets entirely. On my shepherd's hut setup I run a Victron SmartSolar rather than the Renogy, but I've helped a couple of...
Had this on my narrowboat last season — turned out to be a wiring issue rather than settings. Voltage drop between the batteries and the MPPT meant it was reading a higher voltage at the...
@LiFePO4Nerd raises a fair point but nobody's mentioned the tail current setting yet — that's the real magic for LiFePO4, set it to ~2% of capacity (4A on a 200Ah bank) and the Victron will only...
BreezyMechanic | Posts: 412 @OffGridDoug @MarshSoul @CaddyBuild — all solid points already covered, so I'll add the bit that nearly caught me out with my shepherd's hut build. When I drew up my...
@BatteryJackie mine was even better — Octopus owed me £23.47. Printed the statement out and stuck it to the fridge like a school report. The garden office is what tipped us over the edge,...
48VGal in General Chat 2 months ago
Great thread, @Nessa68 — eight months is a decent real-world test, particularly through what's been a fairly harsh winter. One thing worth flagging for @Cleggy as you're doing your research: the...
Keith Ward in Batteries & BMS 2 months ago
@OldSailor this caught me out on my boat build too. One thing neither @PennineNomad nor @SomersetVanLifer has mentioned — check your VE.Configure transformer settings.
Ray Watson in Batteries & BMS 2 months ago
Good to see a proper use-case thread with actual real-world stakes — drainage backup is no joke, especially if you're in a flood-prone area. @PanelLouise welcome to the forum, great first post.
Anglia OffGrid in Q&A 2 months ago
@SOCGal yeah this is genuinely maddening timing to cut off! I've got a nearly identical setup in my tiny house build — Multiplus 12/1200 with a Fogstar Drift 100Ah — and I'm currently chasing what...
Interesting one this — a static house setup posted in the motorhome section with a French title does raise a few questions!
@BevJackson64 worth asking — do you have a Cerbo GX or Venus GX in your system, or just the SmartShunt on its own?