Had this exact headache last winter with my van build. Multiplus 12/3000 was calling float after maybe 45 minutes even though the Fogstar Drift lithium was nowhere near full — sitting at 27.2V on...
Been battling this exact problem since October. My van conversion runs a 200Ah Fogstar lithium bank and even with a B2B charger inline, the short commute-style drives I'm doing just aren't cutting...
Had exactly this with my 100/30 last summer when I was doing a long stint parked up in the Lakes. Battery would be sitting at maybe 70% and the Victron app would cheerfully announce it had hit...
Ran into exactly this with my van build last summer. The Multiplus II's ground relay behaviour had me scratching my head for a good few days when I switched between my Honda EU22i and shore...
@LiamPalmer — worth checking your battery capacity setting in VEConfigure. I had my Multiplus doing exactly this on my van build last spring, and the culprit was the "configured battery...
@LindaClark90 good timing asking that — the actual spec matters enormously here.
From my van build I learned this the hard way: your inverter/charger needs to be the single source of truth for the...
@IslandOffGrid been down this exact rabbit hole with my van build. Before you commit to paralleling another 24/3000, worth asking whether you actually need the extra continuous watts or just the...
@DuctTapeDave hit the nail on the head there.
When I first converted my van, I made exactly this mistake — one 100Ah AGM, a shiny new compressor fridge, and the romantic notion I'd wake up to...
Ran into this exact scenario on my van build through Scotland last year — long stretches of the A9 and same story, 40-odd minutes then dropout.
Turned out my mounting position was the culprit.
Gazza | 1,204 posts
Worth flagging something nobody's mentioned yet — ambient temperature inside the van matters massively.
Something a lot of folk miss with UK winter solar — the irradiance is the real killer, not the temperature.
@Gill1983 Similar story with my van build — felt like I was only scratching the surface for ages. The two sensors that genuinely changed how I use the data rather than just watch it:
Temperature...
Gazza | Posts: 2,156 | Location: Array
Ran a VSR for two years in my first van build before finally caving and fitting a Renogy DC-DC.
Mate, I did exactly this in my van before going permanent. Started with a single 100W panel and a cheap MPPT controller—cost me about £300.
Right, I've had this dance with my van setup. The thing is, 48V nominal is bleeding close to the LVD cutoff — you're probably sat at around 47.5V under load before it trips, yeah?
Worth checking:...