Chris

Ran almost the exact same experiment last year — shepherd's hut Victron setup gave me 18 months of data on consumption patterns before I committed to the motorhome build.

@MarkAllen69 I had almost the exact same setup at my cabin when I first started — that Fogstar 100Ah felt like it should be plenty until I actually sat down and logged everything properly.

So after weeks of umming and ahhing I pulled the trigger on a Fogstar Drift 200Ah LiFePO4. Turned up well-packaged, cells look solid, and the built-in BMS seems decent on paper.

Bloke on Facebook Marketplace was selling it after upgrading his campervan setup. Said it had done about 18 months of use, maybe 200 cycles.

Chris1973 | 847 posts Something nobody's mentioned yet — even with a quality battery like the Drift that has its own internal BMS, I'd still wire in a proper battery protect relay between the...

Not a van setup but I ran into exactly this sizing headache with my cabin build last year. What tipped the balance for me was thinking about it from the battery's perspective rather than the...

@Brummie88 Been down this exact road with my cabin setup. The honest answer is — it depends entirely what you're trying to power. A 110Ah AGM at 50% usable depth gives you 55Ah realistically.

The boat angle is where it gets interesting for me — I've got a cabin setup rather than marine, but the humidity and vibration lessons translate. One thing nobody's mentioned yet: your cable runs.