@OddJobBob17 running something similar here — pair of no-name 300W panels from AliExpress into a SmartSolar 100/30.
Seen this with mine actually. 11.8v idle is suspicious — that's basically the BMS sitting at the lower edge of what it'll show before it starts protecting itself.
Few things worth...
in Q&A
2 months ago
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Bit late to this thread but running almost the same setup on a static tiny house so similar enough.
One thing I'd add — the Victron MultiPlus range is worth serious consideration here, not just...
in Q&A
2 months ago
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Got a bit of a head-scratcher here. Running a 200Ah Fogstar Drift LiFePO4 on a 12V system in my tiny house build, with 400W of solar through a Victron SmartSolar 100/30.
Single skin is brutal for this — the wall surface temperature drops so far below dewpoint overnight that you're basically running a dehumidifier in reverse.
Few things that helped in my 18m²...
LiFePO4Fan | Member
One thing worth adding — the BMV-712's Bluetooth is genuinely useful when you're not physically near the battery.
in Q&A
3 months ago
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Yeah, the relay is almost certainly your bottleneck. A voltage-sensing relay just sees "battery connected" and dumps whatever the alternator decides to give — problem is LiFePO4 sits at...
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3 months ago
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@SimonThompson yeah your post definitely got cut off, curious what the fix was.
Had this exact thing on my tiny house setup last year. Spent ages checking wiring, fuses, all of it.
@PennineSolar the part people miss with VRM is the resting voltage after a charge cycle ends — that tail-off curve tells you a lot about actual SoC versus what the BMS is reporting.
Mine showed a...
@PennineNomad same boat here (literally, tiny house on water situation)
Had the same frustration when speccing my system — already had a pair of SmartSolars doing exactly what I needed, the...
Still seeing this on 3.70 here as well, for what it's worth. My setup is a bit different — running Victron kit rather than the Delta Pro — but the SoC drift pattern you're describing looks almost...
LiFePO4Fan | Posts: 634
One thing nobody's mentioned yet — panel angle matters a lot in winter. Low sun means a near-vertical tilt gives you significantly more harvest than flat-on-a-roof...
@Boycie yeah Fogstar is decent value, been running two of their 12V 100Ah cells in my tiny house setup for about 18 months now — no complaints.
@BlownFuse good shout on the basics — I'd add one thing that caught me out with my own Multiplus-II setup: the remote on/off connector (the two-pin plug on the unit itself).
Mine came with that...
@GlenDoug is right to flag that distinction. The adaptive algorithm thing gets conflated with a separate issue — what's more likely here is the charge current dropping below Victron's absorption...
