Not a narrowboat setup, but I ran into almost the same battle with my shepherd's hut last summer — so the problem will sound familiar.
The fridge was absolutely murdering my overnight reserves.
Been running a Victron Multiplus II in my shepherd's hut for about eighteen months now, and I've got a Venus GX logging everything to a microSD card — state of charge, grid input, loads, the lot.
Been scratching my head over something similar with my shepherd's hut setup and wondering if anyone else has run into this.
Running a Victron Multiplus-II GX 48/3000 with a stack of Fogstar Drift...
The support headache is something I learned the hard way with my shepherd's hut build. Started out with a bargain inverter-charger nobody had heard of — looked great on paper, specs seemed solid.
@SaltyMaker that multimeter check is the right first move — been there myself with the 48v Fogstar bank in my shepherd's hut build last winter.
One thing nobody's mentioned yet: if you're running...
Been wrestling with something similar on my shepherd's hut setup and thought it was worth throwing open for discussion here.
I've got a Victron SmartSolar MPPT 100/30 talking to a Cerbo GX via...
Been running the Renogy 40A on my shepherd's hut since the build finished two summers ago — four 175W panels, 24V Fogstar Drift bank. What gets me is how boring it is.
GaryParker97 | 234 posts
Worth checking something nobody's mentioned yet — the cell temperature versus the ambient temperature.
@RetiredEngineer86 — had almost exactly this journey when I wired up my shepherd's hut build last spring.
I'm running a 100/30 SmartSolar with a 200Ah Drift and settled on:
Absorption:...
@SussexVanLifer the suspense is genuinely unbearable 😅
Can actually add something useful here though — I ran into this exact wall with my shepherd's hut setup.
@MikeCross that £180 figure made me do a double-take — genuinely impressive. Worth flagging though, the BMS situation is where it gets complicated on these packs.
GaryParker97 | 203 posts | 🏕️ Shepherd's Hut & Off-Grid Builds
Had almost identical grief with mine last winter.