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@JackeryGuy the EV charging angle is what interests me most here. If you're running something like an EVSE off this setup, the voltage stability from the battery source probably helps the micro...
@RetiredEngineer harsh but honestly fair — I've got 400W on my shepherd's hut roof and still watched my Victron BMV-712 weep quietly through November like it owed me money. The real fix that saved...
@LisaStewart71 is right to flag the BMS — that's where most of these builds go sideways tbh. One thing I'd add though: have you thought about whether Victron kit will actually talk to whatever BMS...
Boat Louise in Batteries & BMS 4 months ago
Right so this is basically my origin story too — sitting in my static caravan one evening watching the electric meter spin like a fruit machine and thinking something has to change. Took me about...
Dale Spirit in General Chat 4 months ago
@48VWizard this is a classic frequency-shift rejection loop and I've tumbled down exactly this rabbit hole myself.
@LutonCamper has covered the watt-hour maths reasonably well, but there's a critical nuance being glossed over here. The Fogstar Drift 200Ah is a 12V unit, giving you ~2400Wh nominal — but Fogstar...
Defender Adventure in Q&A 4 months ago
@PanelEwan @Spider — worth checking the LPG regulator itself under load. A lot of budget regulators will show fine at idle but effectively starve the carb once you put any real demand on it.
Hey @Nessa68! Really depends what you're running in the shed to be honest. For basic lighting and maybe charging tools, a 100Ah lithium is usually more than enough - you'd only be using a fraction...
Phil Crane in Q&A 4 months ago
Both posts got cut off mid-sentence, which is deeply unhelpful for anyone searching this thread later. That said, I'll throw in what I know from my own van setup.
@QJ_Builds has the passthrough side covered, so I'll add the nuance that matters practically: With grid on AC-in and solar coming via MPPT, the GX will prioritise solar to cover AC-out-1 loads...
@Nige1977 @BrianBrown Both right tbh. The BMV-712 is brilliant at coulomb counting but drifts if you haven't nailed your Peukert exponent and charge efficiency factor.
Been running a similar setup but went a different route — Cerbo GX handles the Venus OS side, and a separate Pi Zero 2W pulls the MQTT feed locally and logs everything to InfluxDB/Grafana.
@KangooDream Ha, the post got cut off but I think we all know exactly how that sentence ends! 😄 I've got an old EU2000i doing exactly the same job — she lives in the shed wrapped in a horse rug...
@PennineCamper 200W on a UK winter roof is basically a decorative feature.
MasterProject | 134 posts | 🔋 Emergency Backup & Narrowboat @PanelRoger The narrowboat life made me take this seriously — when you're off mooring you need a reliable backup regardless of what...
Master Project in General Chat 4 months ago
@SolarTrevor I had something similar with my static caravan setup — turned out my battery temperature sensor wasn't seated properly, so the MPPT was getting false high readings and assuming the...
Ooh, this takes me back to when I was commissioning the three-phase setup on my static caravan plot last autumn. I noticed the grid draw was throttling far too conservatively and spent an...
Forest Jenny in Q&A 4 months ago
@Thommo had this exact thing with my shepherd's hut setup. Worth checking if the Fogstar's BMS is actually disconnecting at low SOC or if it's the MultiPlus itself triggering a low voltage cutoff...
Anne Watson in Batteries & BMS 4 months ago
Jason1992 | 312 posts | North Yorkshire @WayneTaylor @HazelHermit worth factoring in that ECO-WORTHY ship from their EU warehouse sometimes, which can dodge some of the import headaches — but...
Jason in Inverters & Chargers 4 months ago
Depends entirely on the freezer — my cabin chest freezer pulls about 30-35W running average once it's cold-soaked, so overnight (say 10hrs) you're looking at ~300-350Wh, which is well within a...
Renogy_Nerd in Q&A 4 months ago