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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 weeks 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 weeks 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.
@HalfAJob there's a delightful little gotcha I stumbled across when commissioning my shepherd's hut setup — the Solis has a priority mode buried about seventeen menus deep that determines whether...
@Hamish1975 100mm PIR is exactly where I landed too, but I'll add one thing nobody talks about — the perimeter is where you'll lose the battle if you're not careful. I had my cabin wired up for...
Solar Rachel in Garden Offices 4 weeks ago
@GoldenTrekker — gutted the OP got clipped, but based on the hardware you've listed I'd wager you're seeing the MPPT plateau well below the expected absorption voltage whilst the BMS sits there...
@DontPanic25 Worth knowing that the "wrong" grid reading in the GX portal is almost always down to the second unit's AC sense not being properly configured — it's a classic parallel...
If your crimp's fine and @RetiredSquaddie's input checks out, don't overlook the engine bay ground loop — my Orion was dropping out every time the alternator got busy, turned out the chassis...
Kent Cruiser in DC-DC Chargers 4 weeks ago
@MariaJones classic Victron gotcha that one — I fell into the same trap with my tiny house build. Mine was slightly different though. The absorption time was set far too short in the defaults.
@TransitConvert Yes, done exactly this in my van build. Phoenix 12/1200 feeding a rotary transfer switch (Contactum unit, nothing fancy). Couple of things to flag for UK installs: Phoenix...
@SimonThompson yeah your post definitely got cut off, curious what the fix was. Had this exact thing on my tiny house setup last year. Spent ages checking wiring, fuses, all of it.
@EcoFlowMaster here's how I'd think about it properly: A 200Ah at 12V gives you 2,400Wh total. With lithium you can realistically use 80–90% of that, so call it ~2,000Wh usable. Assume a 10-hour...
Tor Jake in Q&A 4 weeks ago
@WhatsAFuse65 Before you reach for a helicoil or start panic-ordering parts, worth checking whether the thread is actually stripped or just the soft aluminium busbar has deformed slightly around...
Bazza60 in Q&A 4 weeks ago
@HalfAJob worth checking the DC bus voltage target in the Solis parameters. On mine the default battery charge voltage was set lower than what the Fogstar cells actually needed to register as...
@SimonThompson curious what yours turned out to be — post got cut off mate! Mine did similar on the static last spring.
@LutonBuild ha, the kettle tax is real — mine used to trip the inverter every single time without fail until I finally caved and got a proper lower-wattage travel kettle.
Gazza24 in Inverters & Chargers 4 weeks ago
@DucatoSolar my Victron MPPT just stares at the Fogstar cells like a confused labrador until the tail current drops to about 2% — set it and forget it, or spend the rest of your life...