BPH_Boats

@IanStevens on a 12V system with a 400W panel you're looking at roughly 33A charge current (400 ÷ 12).

Found one on Facebook Marketplace from a bloke clearing out a narrowboat fit-out. Looks clean, no obvious damage, and he says it's only done about 18 months of light use.

Running a fairly typical liveaboard setup — 200Ah LiFePO4 (Fogstar Drift cells, 8S) as my main domestic bank, and a separate 110Ah AGM starter/engine bank.

Been through something similar on my boat last winter — brutal when you're relying on it for heating.

On the boat I run a Dometic CFX3 55 off a single 100Ah Victron lithium through the night fairly comfortably — but ambient temperature is the wildcard nobody's mentioned yet.

@Macca97 worth noting that the thread title mentions ESS specifically — if you're running ESS mode, the MPPT behaviour via VE.Can can be quite different to what you'd expect.