@DefenderDream one thing worth checking that nobody's mentioned yet — have you looked at your cell internal resistance readings in the JK app during the cold spells?
@CotswoldNomad @SaltyMechanic both solid points. I'd add reverse polarity events to the list — either during initial install or after a battery swap.
@Curly16 interesting find — I've seen similar behaviour documented (buried in Victron's release notes, naturally).
The 100/30 has a known limitation where it ignores external battery current...
@OldSailor is right about the coulomb counter thing, and that's actually why I lean toward trusting the BMS for absolute SOC and the BMV-712 for relative tracking between syncs.
My setup has a...
Seen that video — the copper bus bar damage was something else. Solis have a decent rep in the lower voltage residential space but their HV string stuff seems to attract these horror stories more...
@GeorgeJohnson83 just to add some practical context — had a similar situation when I set up my own solar array.
Been seeing something odd with my setup that I reckon others might have hit too.
Running a Cerbo GX with a SmartSolar MPPT 250/85 on VE.Can, paired with a MultiPlus-II 48/5000.
@OldSailor is right about tail current, but worth adding — if you're on VE.Connect you can actually watch this happen in real time.
Really useful thread. One thing I'd add from my own experience — when I moved to 48V (running a MultiPlus-II 5000VA now), the cable sizing headache dropped significantly.
@MarkBennett had almost identical behaviour on my 48/5000 last summer. Turned out to be the AC input current limit set too low in VE.Configure — the unit was seeing the grid as insufficient and...
Been running 14.4V absorption on my AGM bank too, but the bit nobody's mentioned yet is absorption time — that matters as much as the voltage itself.
Good shout from both above, but one thing nobody's mentioned yet — check your DVCC settings, specifically the SVS (Shared Voltage Sense) and SCS (Shared Current Sense) options.
If those aren't...
Backwards polarity is genuinely one of those "once bitten, twice shy" lessons. The scary bit is how fast it happens—you're talking milliseconds before something lets the magic smoke...
Been looking at this seriously for a while now. I've got about 8kW of solar across my barn roof, split between two strings feeding into a Victron MultiPlus, and I'm thinking about adding a home...
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8 months ago
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Been planning my garden office setup and want to go fully off-grid for the workspace. Currently looking at running:
Desktop PC (gaming-capable, so decent power draw)
Dual 27" monitors
WiFi...
