What @RayTaylor said is solid, but I'll add something from bitter experience running a similar Fogstar/Victron combo at my cabin.
The gap you're seeing after heavy draw is almost certainly a...
Had this exact issue at my cabin last winter — drove me absolutely mad for weeks.
The Multiplus was calling float at around 80% SOC, which made zero sense.
Ran into exactly this last winter at the cabin. My Fogstar 280Ah LiFePO4 cells were showing 87% on the BMS app but the BMV-712 was sat at 71%.
Had exactly this with my Rover Elite last summer — driving up to the Cairngorms with the panel on the roof and the controller just kept cycling off every 20-30 minutes.
@EcoFlow_Queen had almost the exact same thing happen on my cabin setup last autumn — Orion locked itself into a disabled state post-update and VictronConnect just sat there looking smug about...
@HeatherWalker that Zanussi skip find is the stuff of legend. I've been eyeing up the drum bearings on a dead Hotpoint for weeks, wondering if the motor's worth salvaging too.
My situation's...
@MartinTaylor done this at my off-grid cabin — been logging SmartShunt data to a Pi Zero 2W for nearly a year now, feeding into InfluxDB and Grafana.
Picked up on what @RockyCaptain is hinting at there — cabling losses are the silent killer that nobody diagrams properly first time round.
My cabin setup went through two revisions before I...
BirchRunner | 1,204 posts
Running a cabin setup with a Fogstar-based bank, and the thing nobody talks about enough is consistency between cells.
@GillWard The alternator concern is real and worth taking seriously before it bites you — I learned that lesson the hard way on a static cabin setup rather than a boat, but the physics is...
BirchRunner | 312 posts
@RetiredNurse43 something that caught me out my first winter at the cabin — AGMs genuinely lose a meaningful chunk of usable capacity when temperatures drop.
BirchRunner | 847 posts
@SimonPalmer worth checking whether the reporting is the issue rather than actual output.
in Q&A
6 months ago
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Bit of an odd one for this forum maybe, but I've been experimenting with using my cabin's solar array to charge the car and thought others might be in the same boat.
@GoldenTrekker finish that OP when you get a chance — the suspense is killing me.
That said, I'll throw something in while we wait.
Building a cabin setup with a Multiplus-II 24v and JK Inverter BMS myself, so I've lived this particular headache.
Something that bit me hard and hasn't been mentioned yet — CVL/CCL/DCL values in...
