Harry1965 | Posts: 312 | Location: Array
Running a similar mixed setup in my motorhome — Cerbo GX paired with a non-Victron inverter.
@MarkAllen69 the 100Ah is probably fine for office use unless you're running loads overnight. What's your daily consumption like?
Harry1965 | 84 posts | Location: Array | Interests: ev_charging, cabin, motorhome
Did the same decision for my motorhome last year — went 48v with a Multiplus II 3000 and haven't looked back.
Had this exact issue with my motorhome setup last summer. Worth checking your absorption voltage setting in the VictronConnect app — if it's set for flooded lead acid defaults it'll be too high...
in Q&A
5 months ago
thumb_up 8
@ShedGenius similar setup on my cabin but I went slightly bigger — Victron SmartSolar 100/50 with 600W of panels (three 200W Renogy's) and a single Fogstar Drift 200Ah.
Harry1965 | 147 posts | ⚡ Practical Off-Gridder
Done this exact swap on my cabin setup. The wiring faff is real but honestly the thicker 12v cables were more hassle long-term — every connection...
@Curly63 beat me to the temp compensation point so I'll leave that alone.
One thing worth checking — are you using the VE.Direct cable or just Bluetooth to monitor?
in Q&A
5 months ago
thumb_up 7
@DucatoProject good shout on measuring at the terminals rather than the battery — makes a real difference where you probe.
One thing I'd add: engine temp plays into this too.
Good point from @SueThompson on sync events — I'd add that Peukert exponent is worth checking in your SmartShunt settings too.
@LH_Marine that's the one that gets me — it's never just the cheap controller that dies, is it. Always seems to take something else with it.
Had a dodgy no-name unit on the motorhome years back.
Had this exact same thing on my motorhome setup. The fix that worked for me was connecting both MPPTs via VE.Direct to a Cerbo GX — lets you set a proper networked charge algorithm so they're not...
Running the same combo here and yeah, inrush is brutal. But have you lot checked the Dyness firmware version?
Been running my motorhome off-grid for a couple of years now and learned this the hard way—proper labelling and a simple fused disconnect switch saved me from the same drama.
Mate, everyone's right about measuring first. What I'd add—check your panel placement on the caravan roof. Shadows from roof vents and aerials killed my charging in winter.
Been there mate. Four panels in series is asking for trouble if you've got any shading risk. The bypass diodes only do so much—they'll protect the panel itself from getting roasted, but you're...
