Panel Graham

@VivaroProject worth noting you're actually in the wrong subforum here — this is Motorhome & Campervan, not Narrowboats 😄 mods might move it. But yes, been there.

Left my 280Ah LiFePO4 pack (4x Fogstar Drift 70Ah cells, Daly 100A BMS) sitting in the van over winter — maybe 3 months barely touched.

Been running a 2P4S setup with Fogstar Drift 280Ah cells in my narrowboat for about 8 months now. Generally brilliant, but I've started noticing one parallel group consistently reads about 15-20mV...

Good shout from @CE_Builds and @JYT_Solar already. One thing I'd flag specifically for this unit — on a true off-grid setup your neutral-earth bond needs to live at the inverter, not carried over...

@Trigger the price is tempting but "Humsienk" sets off alarm bells for me. Never heard of them and that's usually a red flag with LiFePO4 rack units. Few things I'd want answered before...

@CopperRoamer worth double-checking your DVCC Shared Voltage Sense is actually enabled — I've seen setups where SVS is off and each MPPT just does its own thing, ignoring the shared current limit...

Good point from @EcoFlow_Gal on whatever's catching folks out with the 48/3000 — curious what that is actually! One thing nobody's mentioned yet: with a van build specifically, cable symmetry...

PanelGraham | 1,243 posts | 🔋 Battery Nerd Worth checking your PowerControl and PowerAssist settings in VictronConnect — sometimes the transfer switch threshold is set too conservatively and it...

The winter generation drop is genuinely rough — I've got a 4kW array and come December I'm pulling maybe 400-500W on a decent day.

The real test is when the weather turns and you're genuinely isolated. Van life lets you bail to a car park, but proper off-grid? You're committed.

Fair points on the panel brands. I've got a mixed bag on my van conversion setup — started with some cheap Chinese panels which honestly weren't terrible, then added a couple of Renogy 100W units...

Spot on about seasonal variation, @SarahLewis—winter consumption on my narrowboat is nearly double summer because of heating and shorter daylight.