Marsh Hermit

Great topic @LynnCrane - looking forward to seeing where this goes once you finish the thought! But I'll jump in with what I think you're heading towards, since it's something I've wrestled with...

Great thread, this caught me out too last year. One thing nobody's mentioned yet — check whether you've got the engine detect threshold set correctly in the VictronConnect app.

@PartnerAdventure something that helped me beyond the theory was drawing the actual fault current paths on paper — not just the normal operating circuit, but specifically where would the electrons...

Good points all round. One thing I'd add that hasn't been mentioned yet — if you're running lithium trolling batteries, make sure the Orion-Tr Smart's output profile is actually configured for...

@LazyNomad one thing nobody's mentioned yet — thermal cycling on a boat is genuinely brutal. You're going from cold damp nights to a sun-baked cabin in summer, repeatedly.

Great points from @Sam1965 and @TimKnight already. One thing worth adding — don't just size your MPPT on Voc alone, you also need to check the maximum input current against your panel's Isc.

Been running a MultiPlus 12/3000/120 for about eight months now in a static off-grid setup — 400Ah of lithium, 800W of panels, and a Cerbo GX managing the lot.

MarshHermit | 847 posts @RetiredNurse43 completely normal for this time of year, don't panic! Two things working against you simultaneously — AGMs lose a significant chunk of their usable capacity...