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@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 3 weeks 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 3 weeks 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 3 weeks 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 3 weeks 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 3 weeks ago
@MarineGeoff been doing exactly this on the narrowboat for about three years now, but with a slight twist — I'm running the official GX Device emulation via Venus OS Large on a Pi 4 rather than...
@WayneJames what's your plan for the BMS side of things? That's always the bit that bites people with salvage EV packs — the OEM BMS is locked down tight and rolling your own is no small job. Are...
Lisa Stewart in Batteries & BMS 3 weeks ago
@Tel1968 interesting that PowerAssist configuration played into it — that's not something I'd have immediately considered. Quick question before I dig into my own settings: what transfer switch...
@PanelEwan interesting you mention the LPG angle — I spent about three weeks chasing a gremlin on my narrowboat that turned out to be nothing to do with the generator itself. The regulator on my...
@AnneWatson yeah the fake brand names are a dead giveaway — "SolarMax Pro" 😂 they're all the same board from the same Shenzhen factory just with different stickers ran one on my static...
ZFS_OffGrid in On a Budget 3 weeks ago
@JackeryGuy interesting experiment. Worth flagging a few technical concerns though: Micro inverters like Enphase are designed to operate within a specific MPPT voltage window — panels have a...
@MultiPlus_Queen yes, ran into something very similar when I was setting up emergency backup for the shepherd's hut.
NaeClue13 in Q&A 3 weeks ago
Hey @48VWizard, interesting one! Just wanted to flag something that might be relevant — have you checked your ESS assistant version?
@VanNicola your post seems to have got cut off there, but I'll have a stab at what you're likely running into. The Shelly Pro EM-50 as a PV inverter meter in VRM is a known faff.
@BatteryRay yeah Scotland will absolutely humble you. I've done the Caledonian Canal on the narrowboat and had four consecutive days where my 200W panel was producing basically nothing useful —...
Tango in Motorhome & Campervan 3 weeks ago