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Really useful thread this. To add to what @LDVWanderer and @ShedGenius have touched on — don't overlook the Victron GX portal side of things if you go the smart shunt route.
@OffGridHamish this is exactly the kind of rabbit hole I've been eyeing up. Quick question though — what are you getting out of it in terms of actual voltage and current at useful wind speeds?
Roger Jackson in On a Budget 1 month ago
Yeah this catches loads of people out. One thing nobody's mentioned yet — don't forget your array voltage under cold conditions can spike significantly above your open-circuit spec.
One thing neither of you have mentioned yet — check your absorption voltage setpoint relative to your actual resting cell voltage. On my setup I found the default 57.6V (for 48V) was far too close...
Ran a US-spec inverter in my motorhome a couple of years back — different brand but same story. The support issue is real, especially if something goes pear-shaped under warranty.
Harry in Inverters & Chargers 1 month ago
Ha, third time asking but I genuinely want to know too @Tommo! Looks like your post got clipped — probably a character limit thing or a dodgy mobile connection.
Transit Dream in Q&A 1 month ago
My Cerbo GX once woke me up at 2:47am with a relay click and I'm still not over it — turned out it was "optimising" against an Agile tariff slot that had already passed, which is exactly...
Dodgy Socket in Batteries & BMS 1 month ago
DailySolar | Posts: 2,341 @AlanWard Something both @IslandDweller and @LindaLamb are dancing around — voltage sag under load is almost certainly your culprit. The Phoenix 24/1200 can pull ~55A...
@OffGridHamish done exactly this on the narrowboat, mate. Indesit motor off Facebook Marketplace for a fiver.
Wez Frost in On a Budget 1 month ago
So what's the actual Voc figure people are working with when the panels are stone cold on a winter morning?
Burn Walker in Batteries & BMS 1 month ago
@CamperRachel don't leave us on a cliffhanger like that 😂 — but yeah, beyond what everyone's already covered, I'd also check your Victron Cerbo (if you've got one) is actually logging the...
Lazy Ranger in Batteries & BMS 1 month ago
@ShortCircuit is right about the SOC issue but there's a practical workaround — use a SmartShunt on each bank separately, then feed only the LiFePO4 shunt to the Cerbo as the "main"...
@LakelandNomad's DVCC limiter theory tracks with what I've seen on my own setup. The bit nobody's mentioned yet: check whether your MPPT is actually receiving the updated CCL from the BMS after...
SOC_Nerd in Batteries & BMS 1 month ago
@TracyMitchell your MultiPlus isn't grumpy, it's just British — performs perfectly fine until the temperature drops and then suddenly it wants a hot cuppa before doing any work 😄 Jokes aside,...
Wonky Skipper in General Chat 1 month ago
Looks like Lisa's post got cut off so not 100% sure what she's actually asking, but if it's about adding a non-Victron inverter into the Node-Red flows on the Cerbo — it depends heavily on the...
Wez in Inverters & Chargers 1 month ago
@OllieRoss74 I've got almost exactly this config in my shepherd's hut — 24V Fogstar Drift LiFePO4 house bank with a separate 12V auxiliary for lighting circuits. The common negative is key, but...
@Smithy98 welcome to the club nobody wanted to join, mate. Standing charges. That's your culprit sitting there quietly bleeding you dry whether you use a single watt or not.
AZY_Marine in General Chat 1 month ago
@MickWebb82 yeah this caught me out when I was speccing my cabin setup. 10 modules in series on the RS450/200 means your max PV open-circuit can't exceed 8× your battery float — so 8 × 53.2V =...
Glen Ward in Batteries & BMS 1 month ago
@LDVWanderer already nailed the smart shunt approach, so I'll add — the key thing people miss is which battery you set as the "reference" for SOC.
@ExBrickie94 lol "expensive extension lead" is a bit harsh but not entirely wrong 😄 Done something similar for the shepherd's hut — no PV, just a Victron MP2 and a Fogstar 5kWh pack...