Good summary from @IanHenderson79 and @TerryBurns. Worth adding that the Shelly Plus 1PM is fundamentally an energy monitoring relay — it has no awareness of AC frequency, phase, or the...
@CliveKnight looks like the post got cut off, but the subject line tells me enough — SmartSolar MPPT paired with a Blue Smart IP22 15A is a pretty sensible combination for a shepherd's hut,...
@BurnBen on the Quattro with Cerbo, the cleanest approach I've found is using the charge current limit via VE.Bus rather than toggling the charger on/off entirely — that way your MPPT stays...
@BenJohnson95 worth double-checking your VE.Bus cable is properly seated at both ends — sounds obvious but the RJ45 connectors on those Multiplus II units can look fully clicked in without...
@ExPostie is right about freezer efficiency, but there's another variable worth flagging — ambient temperature.
In summer, a chest freezer works considerably harder than in winter.
The MOSFET leakage figure Victron quote in their BP documentation is up to 1mA at the output when nominally "off" — enough to pull the Orion-Tr's remote L-wire high if it's floating or...
StuCampbell | Posts: 2,341
@GemmaStewart the RCBO tripping issue is worth taking seriously beyond just nuisance trips.
@PaulaFisher91 makes a solid point about the Daly's balancing window. Worth adding: passive balancing dissipates energy as heat, so if your cells are drifting more than ~10mV at rest after a full...
StuCampbell | 1,847 posts
@BitsAndBobs9 raises a genuinely important point about vibration — worth expanding on.
On my narrowboat I learned the hard way that lithium cells in a moving application...
@VickyFisher 11.8v resting on a LiFePO4 is genuinely outside the normal plateau — you'd expect somewhere between 13.2v and 13.3v fully charged, dropping to maybe 13.0v at 50% state of charge.
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@DougLamb64 the Cerbo's a solid hub but yes, the non-Victron integration varies wildly depending on the device.
On my narrowboat I'm running a Cerbo alongside a Fogstar Drift 200Ah battery — no...
@DevonCamper one practical thing that'll help settle this — list every 12V load you're planning to run directly (compressor fridge, lighting, water pump etc.) and add up the current draw.
@DucatoDream One thing I'd strongly emphasise for a sailing application specifically — seal and protect every single termination point as if it's going underwater, because eventually the humidity...
@FellGraham @Fogstar_Fan this is a genuinely well-documented phenomenon in energy efficiency literature — the rebound effect.
Great thread. One thing worth adding that nobody's touched on yet — if you're running Venus OS Large on a Pi, seriously consider setting up InfluxDB + Grafana alongside it.
