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NickThompson65 | 287 posts | 🔋 DIY Enthusiast @LochDweller the narrowboat comparison is actually quite apt — a mate runs a 60ft widebeam and faces identical headaches come November.
Nick Thompson in Motorhome & Campervan 6 months ago thumb_up 8
Spent the last few weekends getting the electrics sorted in my 6x4m timber office. Running a 200Ah Fogstar Drift LiFePO4 paired with a Victron SmartSolar 100/30 and two 200W panels on the roof.
RetiredEngineer86 in Garden Offices 6 months ago thumb_up 6
Just swapped out my old AGM bank on the narrowboat for a mix of Fogstar Drift 100Ah LiFePO4 cells (two of them) alongside a remaining 110Ah AGM I haven't replaced yet.
Rusty Spanner in Monitoring & System Design 6 months ago thumb_up 1
On the narrowboat I've been wrestling with the same question. The thing that pushed me over the edge to finally getting a BMV-712 was realising the MPPT only "sees" what's coming in — it...
Dodgy Captain in Monitoring & System Design 6 months ago thumb_up 6
@BarryCrane worth checking your absorption voltage threshold in the VictronConnect app — on a 24V LiFePO4 bank it should typically be around 28.4V, but if it's been left at the AGM default of...
Burn Spirit in Q&A 6 months ago thumb_up 3
Looks like this whole thread is cursed with cut-off posts 😄 Genuine question though — for those of us running Fogstar Drift batteries on a narrowboat (my setup), is the general consensus that a...
Master Project in Monitoring & System Design 6 months ago thumb_up 5
RetiredElectrician | 1,203 posts | 🔧 Garden Office Bodger PWM + AGM SOC accuracy is basically astrology — you're interpreting signs rather than reading data.
RetiredElectrician in Solar Panels & Controllers 6 months ago thumb_up 4
Bit of a different context but on my narrowboat I went through the same headache — roof space is always the limiting factor. One thing worth considering before you even get to series vs parallel:...
Dodgy Captain in Q&A 6 months ago thumb_up 5
@SamBaker yeah go smaller than the calc suggests — similar situation in my motorhome, tiny space heats fast and you end up with the door open trying to cool down.
Suffolk Solar in Off-Grid Cabins 6 months ago thumb_up 1
Been through exactly this in my shepherd's hut two winters running. Worth noting that the Victron SmartShunt will log your battery temperature history if you've got it paired — useful for seeing...
Crispy Trekker in Batteries & BMS 6 months ago thumb_up 5
Reply by LazyMechanic: @BorderCamper — yes, cracking setup for this! The VRM portal handles multiple installations really neatly under one account.
Curly38 | 312 posts @WayneTaylor Yeah the low temp cutoff is the obvious culprit as @Pylontech_Wizard says, but also worth checking your battery voltage first thing in the morning.
Curly38 in Q&A 6 months ago
Good thread, this one. I'll add something nobody's mentioned yet — check the BMS history if you can.
Brian in On a Budget 6 months ago thumb_up 5
@Gill1983 Similar story with my van build — felt like I was only scratching the surface for ages. The two sensors that genuinely changed how I use the data rather than just watch it: Temperature...
Gazza in Monitoring & System Design 6 months ago thumb_up 2
@KangooBuild 800Ah of Fogstars doing the heavy lifting — respect. I've got a similar setup in the van and honestly the thing that saved me was dropping the charge current right down and just...
Ivy Les in Off-Grid Cabins 6 months ago thumb_up 2
Finally got round to properly monitoring my garden office solar setup after running it half-blind for over a year.
Tony Lee in Monitoring & System Design 6 months ago thumb_up 3
Been thinking about this a lot lately. With all the grid instability chat going on, I've started looking at my existing solar bits differently — less "nice to have" and more "what...
PVKing in General Chat 6 months ago thumb_up 3
MistyRigger | 847 posts @LiamFox I had almost the exact same thing happen with my 75/15 last summer.
Misty Rigger in Q&A 6 months ago
LauraGraham72 | 312 posts | 🏡 Shepherd's hut owner, Shropshire @BatteryWez I went through exactly this with my hut two years ago and ended up at 280Ah after initially planning 200Ah — genuinely...
Laura Graham in Off-Grid Cabins 6 months ago
Gazza22 | Posts: 847 @PartnerConvert Worth looking into Node-RED running on a Raspberry Pi alongside your Cerbo — you can pull data from both the Growatt (via that RS485 @Smudge mentioned) and...