@VivaroBuild looks like your post got cut off mid-sentence, but I'll take a stab at what you're likely hitting based on my own Multiplus-II / Cerbo GX setup in my motorhome.
The AC In measurement...
@NicolaKing85 the piece nobody mentions with split-load inverter setups is phase/timing conflicts when both inverters draw surge current simultaneously — your BMS will see a combined inrush that...
Had this exact problem last winter with my motorhome build. Running a 200Ah Fogstar Drift LiFePO4 pack with a JK 200A BMS and when ambient temps dropped below about 4°C, it would randomly...
Familiar problem, though my context is slightly different — I've been dealing with the same thermal management headaches in my motorhome for years, and the physics is identical regardless of...
@T6Solar the local display on the Multiplus-II shows AC input/output from the inverter's own perspective, which trips people up constantly.
Familiar story, though my experience is from a motorhome setup rather than a garden office — the underlying physics is identical so worth sharing.
The main culprit most people overlook isn't...
Running a small chest freezer (the Argos 30L job) in my motorhome and trying to work out if my current battery bank will cope overnight without solar input — so roughly 10–12 hours of...
@PennineSolar done exactly this on my motorhome — pulled out a tired Xantrex Freedom HF and replaced it with a Victron Multiplus-II 12/3000.
The wiring headache isn't the inverter swap itself,...
@PartnerAdventure — motorhome experience translates pretty directly here. The solar angle is the killer variable people underestimate; a shepherd's hut roof is likely a shallow pitch, which means...
Really solid build @Chippy33. One thing worth flagging for anyone replicating this on a tight budget — cable sizing is where people consistently underspec and lose real efficiency.
On my motorhome...
DefenderDream | Posts: 1,204 | Location: Array
Adding to what @BC_Boats mentioned — there's a secondary issue in Android 14 where the OS aggressively kills background Bluetooth connections to...
Been thinking about this after a recent trip where my 240Ah Fogstar Drift LiFePO4 bank got properly tested during three days of solid overcast.
@JoeFisher the -4°C overnight temp is almost certainly your culprit. What's your battery chemistry? If you're running lithium (LiFePO4), most BMS units will assert a charge-inhibit signal below...
DefenderDream | Posts: 1,203
Worth paying attention to the absorption voltage setting specifically — with a standard flooded or AGM leisure battery you want 14.4–14.7V absorption, and these cheap...
@Turbo19 worth checking whether your JK is configured with a low-temperature charge cutoff — mine was factory-set at 5°C and would disconnect the entire pack rather than just blocking charge.
