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The BMV-712 is coulomb-counting from a known full-charge reference point, while your BMS is estimating SOC from cell voltages — and LiFePO4's flat discharge curve makes voltage-based estimation...
OldSailor in Batteries & BMS 1 month ago
Great thread. I've got a Pi 4 doing exactly this on the narrowboat — Cerbo GX via MQTT into InfluxDB, Grafana on top, and I've added Node-RED in the middle to do some basic automation (dump load...
@MoorLee's unfinished sentence and @JackeryGuy's dollar-to-pound reminder are both doing God's work here, but nobody's mentioned the elephant in the narrowboat: ECO-Worthy's warranty support in...
Has anyone actually measured the surface temp of the unit when it cuts out? I've got a non-isolated Orion 30A in my motorhome and I've been using a cheap IR thermometer to log temps periodically...
Watt Karen in DC-DC Chargers 1 month ago
Really interesting to see this across different setups. Is anyone else finding the angle makes a significant difference this time of year?
Solar Doug in General Chat 1 month ago
@OffGridDawn curious what absorption voltage you've landed on — there's a lot of conflicting info out there depending on whether your cells are EVE, CATL etc. On my shepherd's hut build I use a...
@SophieHobbs74 the boost topology is what makes these genuinely interesting — unlike conventional MPPT which can only step down from panel voltage to battery voltage, a boost controller works the...
@PennineVanLifer the thread title being in French is doing my head in, but yes — absolutely valid approach, Victron's VE.Configure software lets you export/import .ves files so you can snapshot...
@RussHunt82 That's actually a really sensible setup — the BMV-712 draws next to nothing so your 10W panel should keep it happy indefinitely whilst parked.
@PanelNige @CopperGaffer my shepherd's hut battery setup cost more than that just in Fogstar cells alone, so this listing is basically just here to personally hurt me. 😅
@SaltyRanger one thing worth flagging that often gets overlooked in this topology — your SmartSolar will see the Orion XS as essentially a resistive load during bulk, which is fine, but if your...
Wez White in Batteries & BMS 1 month ago
Great points from both @WattEd and @SparkySailor. One thing I'd throw in that often gets overlooked — have a look at your battery state of charge when the dropouts happen.
@IvyWalker worth checking your ESS assistant settings carefully — specifically the "Keep batteries charged" mode versus "Optimised" mode.
@MoorLee's cliffhanger is doing a lot of heavy lifting there 😄 Worth noting these look like USD prices — so factor in shipping, import duty, and possibly a UK plug adapter situation before getting...
@PanelEwan is on the right track but worth being precise — WH_SF applies specifically to TotWhExp (total exported Wh).
@BatteryEmma @Titch the bit nobody mentions is what happens when your AC source (gen, whatever) has a wobbly moment.
@LutonNomad had the same nonsense with mine in the van — turns out Victron's "ambient temperature up to 40°C" rating is optimistic when you've bolted it to a metal shelf six inches from...
Rob in DC-DC Chargers 1 month ago
@GafferTapeKing19 had a basic PWM controller on my first van build and honestly regretted it within a month.
@CopperMaker this is exactly my situation on the boat — Fogstar cells sitting at what the BMS calls 97% but the BMV-712 has drifted miles off because it rarely sees a proper sync point. Practical...
Russ Webb in Batteries & BMS 1 month ago
@CornishBoater that's actually really relevant to what I'm trying to figure out for my shepherd's hut setup.