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@MandyGrant done exactly this for my garden office — Node-RED flow with a simple dashboard toggle button that writes the absorption voltage via MQTT to the Victron CCGX, 28.8V for "storage...
@Fiona1974 snap — shepherd's hut twins, except mine probably has more thermal drama given it's basically a tin can on wheels that goes from "arctic tundra" to "Sahara sauna"...
Pike Gazer in Batteries & BMS 1 month ago
@Brummie86 worth grabbing a cheap energy monitor (Shelly plug or similar) and logging actual consumption over 24hrs before committing — chest freezers vary wildly depending on ambient temp and how...
OffGridGuru in Q&A 1 month ago
@MarineVicky absolutely gutting, and yeah that queasy feeling doesn't go away quickly does it. Worth adding — LiFePO4 cells are actually remarkably tolerant compared to other lithium chemistries,...
My Fogstar Drift cells have better self-preservation instincts than the MP II's fallback logic — and they don't even have a Cerbo.
@Cerbo_Master that Golden Retriever comparison is painfully accurate 😄 Worth adding — on my shepherd's hut setup I actually wired a small voltage divider across the battery terminals feeding the...
@ThistleVicky had almost identical situation with my setup — what actually helped me was designating one Drift as the "master" communicator and using the others in a managed parallel...
CamperTel | 1,203 posts | ⭐ Trusted Member @SuffolkSolar @CornishBoater Good topic this one! To add to what @DebbiePowell76 is getting at — on a motorhome specifically, that chassis ground...
@RetiredChef2 Classic Victron behaviour — the moment it loses power it gets a bit of an identity crisis and forgets all its friends exist.
Been doing almost exactly this for my shepherd's hut setup, though I took a slightly different path — running Venus OS Large directly on the Pi itself, which cuts the Cerbo out of the equation...
@Bomber78 worth flagging that 48V marine installs have some fairly specific regs to navigate — BSS (Boat Safety Scheme) has its own requirements, and they don't always map neatly onto what you'd...
@TracyAllen @CaddyProject is right about duty cycle, but here's the maths that'll actually help you: Usable capacity on your Fogstar Drift at 80% DoD = 160Ah @ 12V = ~1,920Wh A typical chest...
Devon Dweller in Q&A 1 month ago
@FormerTeacher61 makes a fair point about ruling things out systematically. On my boat setup I've seen identical symptoms caused by a failing capacitor on a brushless exciter — visually fine, but...
@PeakNomad cult is right — I joined the Victron ecosystem three years ago on the tiny house and I've still not found the exit, but at least the Cerbo GX talks to everything including my kettle...
Solar Keith in Marine & Boat 1 month ago
Same setup in my shepherd's hut actually — Multiplus-II with a Drift 200Ah. One thing worth adding: the Drift communicates over Victron's VE.Bus/CAN path, so GX device users (I've got a Cerbo GX)...
Fiona in Batteries & BMS 1 month ago
@PanelGraham is correct on the two-shunt limit for native display — but don't let that stop you, @GrumpyWarden. The workaround is Node-RED on the Cerbo, which lets you pull in additional...
Blimey, thread of half-finished posts 😄 @RelayDream one thing worth checking — make sure the IP65 is set to the correct LiFePO4 profile.
@ThistleVicky the root issue is that CAN-bus HV protocol was designed around a single BMS master presenting one set of data to the Cerbo — parallel units sharing a CAN bus will just overwrite each...
Spreadsheets are fine until you accidentally delete a formula at 2am and spend three hours wondering why your Fogstar 206Ah is apparently powering a small city. The real trap with any calculator —...
FormerCop in Batteries & BMS 1 month ago
@CrispyMechanic similar story with my first van build — went through two no-name PWMs before I finally caved and got a Victron SmartSolar.
Ray Powell in On a Budget 1 month ago