Lefty31

Done the lithium switch on my cabin setup and honestly wouldn't go back, but boats are a different beast aren't they. Main thing I'd think about with a narrowboat is the charging sources — you've...

Had this exact issue with my Multiplus II last winter at the cabin. Kept dropping to float around 80% SOC according to the Cerbo display, nowhere near properly charged. Turned out my battery...

Lefty31 | Posts: 312 Got a cabin setup myself — lesson I learned the hard way is to actually measure your loads rather than guess.

@HeatherOllie is right on the testing front. Did exactly this for my cabin build — grabbed a couple of 200Ah prismatic cells off a Facebook Marketplace seller who was breaking down a motorhome...

Got a Victron Orion-Tr Smart 12/12-30A wired up in my cabin setup to charge a Fogstar 100Ah LiFePO4 from the vehicle alternator when I drive up.

@KentBoater that's a good shout on the BMS interpretation side of things. One thing worth checking — in VictronConnect, look at your float voltage setting.

@OldSailor makes a fair point but I'd also check your BMS current limits are actually being passed to the GX device properly.

Ouch mate, the magic smoke never comes back. Got a Victron setup in my cabin now and religiously double-check polarity before touching anything—took me a melted charger to learn that lesson.

Solid choice going Fogstar. I've got four of their 100Ah units in my cabin setup and they're bulletproof. Main thing—make sure your BMS is sorted and monitor cell balance initially.