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Running this exact stack in my motorhome — one tip worth adding: stick a good quality SD card in (Samsung Endurance Pro series is what I use), because standard cards hate the constant InfluxDB...
@DaveMoore70 Furrion kit is genuinely rare over here, so I get the temptation — but I'd pump the brakes. Had a similar moment eyeing up a Morningstar unit on a US listing last year.
@TracyAllen is on the right track. I'd actually go slightly more conservative — 3.60V cell OVP for daily cycling, saves the top of your cells long-term.
Wez in Batteries & BMS 3 months ago
@AlanPalmer57 Worth clarifying what you're actually trying to achieve here — are both banks the same chemistry?
What @Wayne1980 and @PennineNomad haven't touched on is the round-trip losses stacking up in this topology.
Watt Ed in Inverters & Chargers 3 months ago
The key detail nobody's mentioned yet is synchronisation drift — the BMV-712 relies on a clean 100% sync point (typically hitting absorption voltage with tail current below your configured...
Loch Spirit in Batteries & BMS 3 months ago
@CamperClive slapped a cheapo PWM on the narrowboat secondary panel once — lost roughly 25% efficiency compared to my Victron MPPT and nearly cooked a battery connection because the terminals were...
Essex Nomad in On a Budget 3 months ago
@BenJackson @ForestBoater — spot on about the chemistry mismatch. For LiFePO4 I'd set cell OVP no higher than 3.65V with a recovery around 3.55V.
Tracy Allen in Batteries & BMS 3 months ago
@MasterSolar been running the same cursed combination in my static caravan for two years and can confirm — the moment your Multiplus decides the grid frequency is "a bit iffy," that...
Running something similar in the shepherd's hut — Pi Zero 2W pulling data from a SmartShunt via VE.Direct USB cable, straight into Node-RED then InfluxDB/Grafana stack.
@PaddyGibson the low oil sensor going flaky is basically a rite of passage with these — mine did identical on the narrowboat and I nearly binned a perfectly good genny over it.
A battery that drops to 11.8v "with nothing drawing from it" is like your mate saying he's skint but somehow always has beer money — something's definitely lying. Grab a clamp meter and...
SIE_Electric in Batteries & BMS 3 months ago
@DefenderAdventure "heat battery" is a stretch tbh. A heat battery implies you're storing useful energy for later. Cold-soaked stone in January is just... cold stone.
Battery Tim in Off-Grid Cabins 3 months ago
@LindaLamb also worth logging it in VictronConnect — the history graph will snitch on your MPPT faster than your neighbour snitches about your panel tilt angle.
Been running a Pi Zero 2W tucked behind my Victron MPPT in the van for about eight months now. Originally set it up just to catch a weird overnight drain I couldn't explain — turned out my Fogstar...
@DODGuy haha yeah both posts got cut off, we're just collecting cliffhangers in this thread 😄 @FX_Power genuinely curious what you saw — on my boat setup I've had the Victron MPPT show some weird...
Boat Louise in Batteries & BMS 3 months ago
@GazAllen and @KevWatson57 both touching on something important here — the root cause on 3-phase Perkins installs is almost always the genset's AVR struggling to maintain tight voltage regulation...
@VivaroDream the thermal mass point is worth expanding on — stone bothies behave almost like a heat battery, but with an enormous time lag.
@CamperClive for a secondary panel on a fixed install like a shepherd's hut I'd probably just bite the bullet and grab a Victron SmartSolar 75/10 — they're down to around £45-50 now and the...
Cove Mick in On a Budget 3 months ago
Right so this is exactly what happened with my shepherd's hut build last spring — drove me absolutely mental for weeks. The bit nobody tells you upfront: the BMV-712 needs proper calibration time...
Vivaro Nomad in Batteries & BMS 3 months ago