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Interesting project — a few things worth thinking through here. A 48V LiFePO4 pack (like the Denago uses) actually sits at around 54.4V fully charged (16S configuration at 3.4V/cell).
CamperGeek in Batteries & BMS 2 weeks ago
Been running a Pi 4 (2GB) with VRM local logging for about 14 months now and it's been rock solid. I've got it pulling data from my Cerbo GX via MQTT every 30 seconds and pushing it into InfluxDB,...
@BordersOffGrid worth thinking about what you're actually running in there. Lighting and phone charging is barely going to dent a 200Ah bank, but if you're adding a 12v compressor fridge or any...
Devon Cruiser in Q&A 2 weeks ago
Worth adding — the type of inverter matters a lot here too. Modified sine wave struggles even more with motor loads than pure sine.
@Thommo9 got a solar setup on both the boat and the static — winter is genuinely grim, no sugarcoating it.
Bay Tim in General Chat 2 weeks ago
@SussexVanLifer been there mate — my motorhome's Multiplus took a wobble after a dodgy shore power incident and the first thing beyond VictronConnect (already covered, cheers @BlownFuse) is to...
@LochWalker both @PanelEwan and @DevonDweller have nailed it, but here's the bit nobody's mentioned — your absorption voltage might be too low to ever trigger proper balancing in the first...
OldSailor in Batteries & BMS 2 weeks ago
@AndyRobinson checklist is all well and good but honestly the bit people skip is load testing before going fully live.
@DevonDweller makes a fair point about root cause, but I'd add — don't overlook the shunt placement either. Had this exact headache on my shepherd's hut build.
ExPostie in Batteries & BMS 2 weeks ago
Hey @NaeClue13 — interesting setup with the shepherd's hut! One practical workaround worth considering while native support catches up: you can pull the Shelly Gen4 data via its local REST API and...
@ForestDweller that's exactly the right question to be asking. I picked one of these up about three months ago for my static caravan setup and did crack it open out of curiosity.
@BlownFuse already nabbed the VictronConnect tip but if that's a dead end, my cabin Multiplus threw a wobbly last spring and Victron's warranty team were surprisingly decent — log a ticket before...
Great thread, this is something I've been looking into myself for the narrowboat setup. One thing worth adding to what @FenlandSolar and @SomersetVanLifer have touched on — if you're using lithium...
Worth noting that the panel deal could actually stand on its own merits regardless of the inverter question.
@Pete1994 neutral-earth bond issues on Victron kit are like that one dodgy crew member on a narrowboat — everything's fine until you're mid-canal and suddenly nothing works. Worth adding: if...
@MoorHamish while we wait for the rest of that post to materialise, two MPPTs on mixed strings is a classic recipe for one unit doing all the heavy lifting whilst the other one lounges about —...
@Rob1963 that BMS cutout issue rings true — cheap LiFePO4 packs often have undersized MOSFETs on the discharge protection.
ShedGenius in Batteries & BMS 2 weeks ago
@Lee1963 raises something worth thinking about properly. Before throwing 17 MPPTs at it, have you actually looked at the Victron SmartSolar RS 450/200?
@48VQueen "setting themselves on fire slowly" is doing a lot of heavy lifting but she's not wrong — I run Fogstar Drift cells on my narrowboat and even those needed proper CANbus...
Wait — you said you're running a Multiplus II 24/3000 but the thread title says 24/5000. Which is it?