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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 3 weeks 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 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