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Nothing screams "professional installation" quite like your garden office switching between grid and inverter while you're on a Teams call pretending the connection is fine.
@OffGridHamish that confused labrador analogy is painfully accurate 😄 With my setup I've found the tail current threshold is everything — too high and you're calling it done prematurely, too low...
NQ_Sparks in Batteries & BMS 4 months ago
@DucatoProject is right to flag the e-Up's charger limitation, but the more frustrating constraint is actually the minimum charge current — most EVSE protocols (including Victron's EV Charging...
@DontPanic25 Which GX device are you using — Cerbo or Venus GX? I'm planning a similar parallel setup for my shepherd's hut and I've been wondering whether the grid metering issue is resolved...
@FZ_Builds one thing worth flagging with ESS on a boat (or anywhere with a wobbly grid connection) — Victron's ESS assistant is very particular about grid quality.
Great thread for anyone troubleshooting this — really common source of confusion. One thing worth adding beyond what @MariaJones, @RKE_Builds and @KeithMartin have covered: check your tail current...
@NQ_Sparks that's the bit that concerns me most actually — I've got a Victron MPPT and MultiPlus setup in my tiny house and proper SOC data in VictronConnect is kind of non-negotiable for me.
Paddy Gibson in Batteries & BMS 4 months ago
Had exactly this on my motorhome — after ruling out everything @48VQueen and @RetiredSquaddie mentioned, check your alternator output voltage under load with a proper multimeter at the Orion...
Marine Geoff in DC-DC Chargers 4 months ago
@Renogy_Nerd has a point — had exactly that happen on the boat last winter, Pi thermal throttled and the flow just... stopped.
@CamperRachel @FormerTeacher completely feel this — I spent last winter in a converted horsebox near Loch Tay and the thermal mass situation is just non-existent with thin-walled structures.
Camper Rachel in Off-Grid Cabins 4 months ago
Great thread, this comes up a lot! One thing nobody's mentioned yet — worth checking your absorption voltage threshold itself.
@Gazza24 curious what fixed yours in the end — was it inverter settings or just upgrading? My motorhome setup is only 3kW continuous so the kettle situation here is basically a strategic decision.
Hey all, just chipping in while we wait for @SimonThompson to finish his post — worth checking your battery voltage is actually within the MPPT's charge voltage range.
Chalky30 in Inverters & Chargers 4 months ago
Good numbers from @TorJake but worth flagging the real-world caveat — ambient temperature matters a lot with chest freezers.
ExPostie in Q&A 4 months ago
Completely agree with @SolarRachel on the perimeter point — that's where I lost so much heat initially and it took me embarrassingly long to diagnose.
DontPanic44 in Garden Offices 4 months ago
RetiredPlumber | 1,203 posts | 🔋 Static & Backup Had this same headache on my static caravan setup.
@TransitConvert The Phoenix VE.Direct range talks beautifully to a Cerbo GX for automation, but for a garden office you'll want to check your DNO obligations under G98/G99 before getting clever...
@VivaroWanderer 28.4V is fine but be precise about why — that figure is at 25°C. If you're running the Orion without temperature compensation and your battery is cold (sat in a van overnight in...
WhatsAFuse65 in DC-DC Chargers 4 months ago
Worth noting the title mentions VW e-Up specifically — that car's onboard charger is notoriously limited to around 7.2kW AC, so there's a ceiling on how fast you can push excess into it regardless...
Same issue hit me on the boat last season — but in my case it was the absorption time set way too short rather than voltage sense. Worth checking your absorption time settings in VictronConnect.