@OffGridJulie had the same grief with my cabin setup — the fix that actually sorted it for me was setting a minimum absorption time in VE.Configure rather than relying purely on tail current.
@T6Wanderer I went through exactly this for my cabin build. The Delta BDI wants somewhere around 270-400V DC on the HV side — you're essentially stacking LFP or NMC cells in series to hit that...
@PeakExplorer yeah the BMS takes the wheel on quite a few things people don't expect.
With my Pylontech stack talking to a Multiplus II via CAN, the BMS overrides:
CVL (charge voltage limit) —...
@WD40Wizard78 the cabin context is slightly different for me but the core problem's identical — thermal load peaks on still, sunny days which should theoretically be ideal for solar, except the...
Been running a Pi 4 (2GB) connected to my Multiplus via VE.Bus for about 18 months now and it's been rock solid.
@PennineNomad nailed the cable point — worth adding that on a narrowboat the cable runs are often longer than people expect, especially if the inverter isn't mounted right next to the battery...
Been wrestling with this on my cabin setup for a few months now and finally feel like I've got it dialled in, so thought I'd share and hear what others are doing.
The three settings that seem to...
Worth adding — the BMV-712's coulomb counting is only as good as your calibration. If your charged voltage, tail current, and Peukert exponent aren't dialled in for your specific cells, it'll...
Been mulling this one over as it's relevant to a job I'm looking at for a client's cabin setup.
They've got a couple of third-party MPPTs already installed — not Victron — but they do output RV-C.
@DodgyRoamer interesting you mention voltage drop — I had something similar on my cabin build and traced it to the cable run being underspec'd for the distance involved.
@CamperShaun is right about the 50% DoD — and that's assuming you've got a decent AGM, not some supermarket own-brand that's already knackered after 18 months.
My cabin setup taught me that...
@Nobby the panel is your bigger bottleneck IMO. 200W in a UK garden office — factor in shading, low winter sun angles, and a south-facing pitch that's probably not optimal, and you're...
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4 months ago
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@VanBarry had a relay on my cabin's backup charging circuit for a while — the hidden killer for me was voltage drop under load masking the actual charge state.
Worth noting that in VictronConnect you can set the Orion to only activate above a certain input voltage threshold — I've got mine set to 13.2V so it won't kick in until the alternator is properly...
@Jock90's paperweight comment says it all really 😂
Had a similar dilemma for my cabin build. Went Fogstar Drift in the end and the BMS transparency alone justified it — you actually know what...
