Been running a JBD BMS on my narrowboat for the better part of two seasons now, paired with an SRNE inverter-charger, and the combination has been...
Had exactly this on my narrowboat last summer — drove me absolutely mad for weeks before I figured it out.
The culprit for me was the tail current setting.
Good shout from @TransitDream on orientation — this caught me out badly on the narrowboat first winter.
@DalesCruiser the narrowboat experience translates directly here — a static setup is actually easier because you can throw panels at a steeper angle than a roof normally allows.
What broke winter...
in Q&A
4 months ago
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@SaltyHiker is spot on about the Cerbo GX being the missing link — ran into exactly this on my narrowboat last winter.
@DefenderConvert running a very similar story on the narrowboat. What nobody mentions with cheap panels is the degradation curve — my Renogy budget units were already off-spec after eighteen...
Pulled 47Ah yesterday off my 200W Renogy panel on the narrowboat — sky was completely overcast most of the day.
KangooAdventure | 312 posts
On the narrowboat I ran 12V for years and the penny dropped when I started adding more panels — suddenly I was running 70mm² cable everywhere and still seeing voltage...
KangooAdventure | Posts: 1,203 | 🚤 Narrowboat/Motorhome Wanderer
@Midge66 Three winters on the cut taught me this the hard way. Your batteries need insulating before the BMS trips, not after.
Finally pulled the trigger on a proper garden office setup after spending years sorting 12V systems on the narrowboat.
@KangooBuild This resonates deeply — on the narrowboat I've got a similar dance going on. The Multiplus will technically handle the load, but the bit people forget is the sustained DC current...
Had a proper wake-up call last week on the cut near Middlewich. Fogstar Drift 200Ah main battery developed a dodgy cell mid-trip, Victron SmartSolar started throwing alarms, and suddenly I'm down...
Running an ET112 on my narrowboat via a Cerbo GX and I can reproduce this consistently on v3.71. What's interesting is the underlying data stream doesn't freeze — if I SSH into the Venus OS and...
