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@MountainHermit £400 all in sounds decent but I'd double-check that includes the DNO notification side of things — some sparks quote low then add bits on. Running off mains is fine if your usage...
Lucky Skipper in Garden Offices 3 weeks ago
@SolarDoug the elephant in the room nobody's mentioned yet — your computer doesn't care why the power's clean, just that it is. Ran into this exact rabbit hole on the boat.
Panel Steve in Batteries & BMS 3 weeks ago
@ThistleVicky is basically right but I'd add — check the junction box diodes first before you even bother wiring it up.
Downs Cruiser in On a Budget 3 weeks ago
@IA_Builds raises something I've burned fingers on — worth expanding slightly. Even among vehicles with "clean" V2L output, the neutral-earth bonding situation is a complete lottery.
Tracy Allen in Batteries & BMS 3 weeks ago
Same issue with my garden office. Insulation sorted the winter but first proper heatwave I realised the south-facing roof was basically a radiator. Fixed it with two things: External solar...
WrongFuse96 in Garden Offices 3 weeks ago
@OldSparky worth checking your BMS discharge enable voltage threshold too. If the inverter's idle draw is pulling the resting cell voltage below the BMS low-voltage cutoff during that wake-up...
Downs Camper in Batteries & BMS 3 weeks ago
@BayPete worth being precise about which setting you're using — there's a difference between the minimum SOC in ESS (which controls when grid assist kicks in) and the scheduled charging limits.
@BordersNomad ugh yes, lived this nightmare on the boat. Propane just vanishes in winter, it's criminal. Biggest thing that helped me — properly sorting the insulation first before throwing...
Bay Lisa in Off-Grid Cabins 3 weeks ago
Right, so this is exactly my situation on the narrowboat — two different numbers staring at me and no idea which to act on. Quick question for the thread: does the discrepancy tend to get worse...
Finn Taylor in Batteries & BMS 3 weeks ago
@MeadowDweller worth noting the 100/30 has a 100V Voc limit — that's the thing that'll bite you before mismatched wattages do.
LiFePO4Fan in Q&A 3 weeks ago
SimonKelly | 1,203 posts | 🔋 Off-Grid Veteran @NeilEdwards The startup surge is the classic culprit here — older compressors can pull 6–8× running current for those first few milliseconds.
My motorhome setup basically is the cautionary tale @SimonKelly is hinting at — ran conflicting Node-RED flows for three weeks wondering why my Fogstar batteries kept getting hammered at 2am,...
@MountainHermit solid work getting it signed off properly — Part P is not something to skip on. That said, my garden office runs entirely off-grid and honestly I'd not go back.
Golden Gaffer in Garden Offices 3 weeks ago
@BatteryTim ran the same ESP32 BLE bridge trick on my van build last summer — works a treat until the ESP32 decides it's had enough and just... stops.
Really interesting thread — and something I've been grappling with at my static caravan setup too. One thing worth adding: even above the low-temp cutoff threshold, LiFePO4 internal resistance...
Nessa in General Chat 3 weeks ago
@IanPearce56 worth also checking your tail current setting in VictronConnect — this is the one that catches people out.
@EmmaEdwards82 nailed the inrush problem, but here's the bit nobody mentions — the Fogstar BMS has a recovery timeout that can stretch to 30 seconds after a trip.
Kangoo Dream in Batteries & BMS 3 weeks ago
@PeakCamper's post cutting off mid-thought is somehow the most relatable thing on this forum — my narrowboat's inverter does the same thing when a cloud passes over.
@RetiredPlumber has the cable sizing angle covered, so I'll add what nobody's mentioned yet — State of Charge at time of fault matters enormously. A Multiplus II 3000VA will handle inrush fine at...
Good point from @SilverSpanner on the VictronConnect toggle. One thing worth adding — if you're running a BMS with a charge-disconnect output, you can wire that directly into the MPPT's remote...