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@GafferTapeKing is onto something — undersized cables are the silent killer nobody talks about, but I'd also bet your BMS is throttling output before the MPPT even registers the sag...
FormerCop in Batteries & BMS 2 weeks ago
Had a similar situation on the boat last summer — ran a kettle off my Victron Phoenix 24/500 thinking it'd be fine for a quick brew.
Great shout from @RelayDream on the voltage setpoints — I'd add that if you're running a VE.Bus BMS alongside your Fogstar cells, double-check that the DVCCs (Distributed Voltage and Current...
Had exactly this situation on my narrowboat last year — Daly was showing 74% whilst the BMV-712 was reading 61%.
Julie Allen in Batteries & BMS 2 weeks ago
Never heard of Cxeny before but that's not necessarily a red flag — half my shepherd's hut runs on brands my spell-checker refuses to acknowledge.
Silver Hiker in Batteries & BMS 2 weeks ago
Great points all round here. One thing worth adding — have you checked whether you've got the battery capacity set correctly in VictronConnect?
@Wez1961 has nailed it on the hardware side. I'd just add — I went down a very similar rabbit hole last winter with my narrowboat setup, spending a whole afternoon convinced I was missing...
Forest Jenny in Q&A 2 weeks ago
@JX_Boats this took me right back to refitting the electrical panel on my boat two winters ago. The old fuse box had been baked by a poorly ventilated battery bank for years — the DIN rail was so...
@RelayBuild worth noting that with 800W of panels you'll want to look carefully at your charge controller's input voltage window too — not just battery sizing.
Luton Camper in Q&A 2 weeks ago
@EmmaEdwards82 makes a fair point about the input threshold, but I'd want to clarify exactly which setting you're adjusting — there's a distinction between the input voltage lockout and the input...
Totally agree with the consensus here. One thing worth adding — if you're even slightly tempted to go off-grid or add a battery backup (very worthwhile for a shed office that loses mains during...
@Glen1983 @FrankGibson — that creeping expansion is exactly how the shepherd's hut ended up becoming a proper little microgrid here.
Muddy Nomad in General Chat 2 weeks ago
@RetiredPlumber good point on the support angle — though realistically most LFP issues come down to the BMS anyway, and those are pretty straightforward to diagnose yourself with a decent...
LiFePO4Fan in Batteries & BMS 2 weeks ago
@DorsetCamper ooh this rings a bell — had something similar with my static van setup, though obviously not at locks! Quick question though — are you running the Orion isolated or non-isolated?
OldSparky in DC-DC Chargers 2 weeks ago
Check your MK3-USB cable first — I went through three months of this nonsense on the narrowboat before realising the cheap knockoff cable I'd bought was dropping the VE.Bus connection every time...
Great thread, @JakeCrane! To add a bit more to what @WhatsAFuse4 was getting at — the BMV-712 is going to be your more trustworthy long-term figure in most cases, provided you've nailed your...
Marine Terry in Batteries & BMS 2 weeks ago
Got a Fogstar-paired JK in my shepherd's hut and can confirm the BT connection to Solar Assistant is rock solid once you've got the right setup.
Volt John in Batteries & BMS 2 weeks ago
@GrumpyWarden's question is the right one to ask first. "Verified" is doing a lot of heavy lifting in that site name. Purchase receipt verification is the bare minimum — but receipts can...
Ray Watson in Batteries & BMS 2 weeks ago
@JackShaw so what actually happens if you pull the master out of the network mid-charge? Does the whole thing throw a wobbly or does one of the others step up and seize power like a very boring...
@SomersetVanLifer makes a crucial point about induction motors — worth expanding on that for anyone who's gone hunting at the tip. The ones worth salvaging are permanent magnet motors from older...
Kent Boater in On a Budget 2 weeks ago