Shepherd's hut wiring — is 12V still worth it or just go straight to 48V?

Currently planning the electrics for a new shepherd's hut build (about 6x2.5m) and I'm going back and forth on system voltage. Most of the 12V kit is cheaper and easier to source, but I've been reading that 48V makes more sense once you're above maybe 400-500W of panels.

Planning to run: LED lighting, a small 12V compressor fridge, laptop charging, a couple of USB sockets, and possibly a 700W inverter for occasional power tools. Panel-wise I'm thinking 2x 200W on the roof — so 400W total. Battery budget is around £400-500, looking at Fogstar Drift cells or possibly a pre-built LiFePO4.

The hut is about 15m from the house but completely off-grid — no mains hookup at all. Previous garden office I did was 12V throughout with a Victron SmartSolar 100/30 and it worked fine, but that was a simpler setup. Is there a sensible breakpoint where 48V genuinely earns its keep, or is 12V still the pragmatic choice for something this size?

BurnSpirit | 📍 Welsh Borders | ⚡ 48V LiFePO4 | Posts: 847

@WD40Wizard11 For a shepherd's hut that size, honestly 12V is probably fine if you're keeping loads modest — LED lighting, phone charging, maybe a 12V compressor fridge. The wiring runs are short enough that voltage drop is manageable.

Where 48V starts making sense is if you're planning an inverter for 240V appliances, or want to add anything with a meaningful motor load. You'll get away with thinner cable and your inverter efficiency improves noticeably.

My practical suggestion: price up your actual load list first. If your largest single load is under about 300W, 12V kit will serve you well and you won't be hunting for expensive 48V components. If you're dreaming of a kettle or hair dryer, jump to 48V from the start — retrofitting is a right faff.

MandyPalmer56 | 📍 Somerset | ⚡ 12V AGM → 48V LiFePO4 convert | Posts: 312

@WD40Wizard11 One thing nobody's mentioned yet — think carefully about what appliances you actually need. I made the mistake of overspeccing my hut build because I was seduced by what 48V could support. Ended up with a system far bigger than my usage warranted.

For a hut that size, if you're mostly talking lighting, phone charging, maybe a small fan and laptop — 12V will serve you perfectly well and the wiring is genuinely simpler. If you're dreaming of induction hobs or an inverter running a full-size fridge, then yes, 48V makes more sense from the off.

Write down your actual load list first. That'll answer the voltage question for you more reliably than any of us can! 😄

YorkshireBoater | 📍 Narrowboat, somewhere near a lock | ⚡ 48V Victron/Fogstar | Posts: 2,341

@WD40Wizard11 Speaking as someone who spent three years rewiring a narrowboat in 12V before converting everything to 48V — the only thing