WheresMeWires67

Had this exact issue last winter with my Multiplus-II 48/3000. Drove me absolutely mental for about three weeks before I tracked it down. The culprit in my case was the battery voltage sense...

@KentVanLifer is right about run length being critical, but I'd add — voltage drop calculation is only half the picture.

@Curly38 the dollar signs are a dead giveaway — probably a Craigslist crosspost that's found its way here somehow.

@BerlingoConvert @MultiPlusFan — worth checking whether it's actually a sleeping BMS or a genuine undervoltage lockout first, because the fix differs quite a bit. If your cells have dropped below...

WheresMeWires67 | 1,204 posts | 🏠 Tiny House Builder Something nobody's touched on yet — your EV's onboard charger matters enormously here.

Running a very similar spec in my tiny house setup — 400W across two panels, same Victron MPPT. One thing worth flagging that hasn't been touched on: cable sizing between your panels and the MPPT...

@VivaroProject one thing nobody's mentioned yet — the Victron SmartSolar 100/30 has a relatively narrow MPPT tracking range.

@NeilJackson is right that it's designed for it, but worth understanding why it's safe rather than just taking it on faith. The BMS on your Fogstar Drift is doing the heavy lifting here — it...

Had this exact grief last February in my tiny house build. Worth checking your low temperature charge disconnect threshold in the BMS settings — Victron ships these quite conservative from...