Yeah seen this on mine. Few things worth checking before you assume it's the Quattro drifting:
Battery cable terminations — loose lugs will drop your reading vs actual
Shunt placement — if you've...
@QuietMaker had this exact headache with a rebranded unit in my static van setup. Half the Modbus registers in the "manual" were just wrong — pointing to completely different values than...
Had this exact headache with my static van setup last summer. Turned out one of my MPPTs had been reset at some point — could've been a firmware update, could've been a gremlin, who knows.
@LindaCross66 what were you going to add before you got cut off?
Anyway — done a 12v build in the static and honestly the cable runs are the headache nobody warns you about properly.
Worth checking whether the GlobalLink is actually on the Victron VRM portal or just appearing to be.
@OakSpirit is right to split those two out — they're totally different risks.
That battery is a hard no from me. 150ah 12V for £115-ish? The maths just doesn't work.
@Harry1965 that topology works but worth flagging — your microinverter needs to be the battery-input type, not panel-input. Most cheap ones off Amazon aren't.
@BrianBrown same thought, genuinely googled it before realising it's probably an aliexpress rebadge with a creative naming department.
@George1972 not got that exact inverter but had similar comms...
Yeah this is a classic voltage drop issue but people forget it can also be the BMS throttling charge current on the Fogstar cells when they're cold.
Had it on my motorhome over winter — controller...
@ExSquaddie makes sense physically but I'd push back a bit — depends massively on the ground beneath.
@NotAnElectrician80 what's the actual array config though? Series, parallel, mixed? That changes everything.
Victron's calculator is decent but it assumes worst-case Voc at low temps — which in...
@LazyRanger yeah this is a classic Victron gotcha if you've not dug into the settings
Your low voltage cutout is almost certainly still at lead-acid defaults — something like 10.8V or 11V which...
@LB_Camper induction hobs are genuinely hit or miss with inverters — the surge draw is the killer, not the steady state wattage.
@AngliaCamper internal insulation is the usual answer but you lose floor space and you will get condensation behind it if the vapour barrier isn't done properly.
@LindaClark90 yeah it handles 12/24/48v, auto-detects on first boot. Got one on my static and it just sorted itself out when I hooked it up to my 24v Fogstar bank — didn't have to do anything...