Good point from @JasonMoore — I hit something similar in my van build last winter parked up on a Welsh hillside at around -8°C.
What nobody's mentioned yet: check your MPPT's absorption and float...
So here's the situation. I've got a 175W Renogy panel that's been bolted to the roof of my Transit conversion for about two years, doing sterling work.
@VoltBarry that CT clamp story is painfully familiar — spent three weeks scratching my head in my van conversion before I realised mine was reading both the import and export simultaneously and...
Right, so I went through exactly this headache sizing my van setup before I eventually moved into a tiny house — the Scottish Borders winter genuinely humbles you.
One thing nobody's mentioned...
@RetiredChef is onto something there. Ran into exactly this with my van build — VE.Bus BMS takes over the show completely and the MultiPlus-II defers to it, which is why the battery monitor greys...
Two years of lurking is basically the perfect apprenticeship on here. You've watched enough threads spiral into debate about battery chemistry and controller sizing that you'll know which hills...
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