Off-grid cabins need reliable power without access to the electrical grid. A portable power station paired with solar panels provides clean, quiet energy for lighting, refrigeration, communication, and comfort. Here is how to size and set up a cabin power system.
What an Off-Grid Cabin Typically Needs
Essential Load (Daily)
| Device | Wattage | Hours/Day | Daily Wh | |--------|---------|-----------|----------| | LED lights (5 bulbs) | 50W | 6 hrs | 300Wh | | Mini-fridge | 60W avg | 24 hrs | 1,440Wh | | Phone charging (x2) | 40W | 2 hrs | 80Wh | | Wi-Fi hotspot | 10W | 12 hrs | 120Wh | | Laptop | 60W | 3 hrs | 180Wh | | Total | | | 2,120Wh/day |
Comfort Load (Additional)
| Device | Wattage | Hours/Day | Daily Wh | |--------|---------|-----------|----------| | Portable fan | 40W | 8 hrs | 320Wh | | Electric blanket | 200W | 6 hrs | 1,200Wh | | Coffee maker | 1,000W | 10 min | 167Wh | | TV/streaming | 110W | 3 hrs | 330Wh | | Total | | | 2,017Wh/day |
Full daily need: 4,137Wh with comfort loads, or 2,120Wh essentials only.
Sizing Your System
Weekend Cabin (2-3 Days, Essentials Only)
Minimum capacity: 4,000-6,000Wh Recommendation: EcoFlow Delta Pro 3 (4,096Wh base) with a 400-800W solar panel array
The Delta Pro 3 covers 2 days of essentials on a full charge. Add solar panels and you can extend indefinitely in good weather.
Weekend Cabin (2-3 Days, Full Comfort)
Minimum capacity: 8,000-12,000Wh Recommendation: EcoFlow Delta Pro 3 with 1-2 expansion batteries (8,192-12,288Wh)
Or: Bluetti AC200L expanded to 8,192Wh with expansion batteries.
Full-Time Off-Grid Living
Daily need: 4,000-6,000Wh (must be replenished daily via solar) Recommendation: Consider a permanent solar installation. Portable power stations can work as a bridge or supplement, but full-time off-grid living pushes the limits of portable systems.
Solar Panel Sizing for Cabins
To sustain 2,000Wh of daily use from solar alone (essentials only):
| Panel Array | Daily Output (6 sun-hrs) | Covers 2,120Wh? | |-------------|-------------------------|-----------------| | 200W | ~840Wh | No | | 400W | ~1,680Wh | Almost | | 600W | ~2,520Wh | Yes | | 800W | ~3,360Wh | Yes, with margin | | 1,200W | ~5,040Wh | Full comfort load |
Recommendation: At least 600W of panels for essentials-only off-grid cabin use. 1,000W+ for full comfort loads. Always size for cloudy days (50% of rated output).
Setup Tips
- Mount panels on the roof or a ground frame for maximum sun exposure. Angle toward the south (in the Northern Hemisphere) at your latitude angle.
- Keep the power station indoors. Protect it from temperature extremes and weather.
- Run long solar cables to the station. Keep cable runs under 50 feet to minimize voltage drop.
- Have a backup plan for cloudy stretches. A car charger or a small gas generator can supplement during extended overcast periods.
- Monitor daily consumption. Use the station's app to track how much energy you use and adjust habits accordingly.
Related reading: Learn about solar panel selection in our solar panel guide. See the top picks in our best solar generators roundup.