Complete Off-Grid Cabin Equipment Guide
Running a cabin off the grid means designing a self-contained energy and water system that handles daily loads year-round -- including the shorter, cloudier days of winter. Unlike RV setups that might rely on shore power between trips, a cabin system is your only power source. This guide covers every equipment category you need to build a reliable, permanent off-grid cabin system, from solar arrays and battery banks to water filtration and inverters.
Last updated: April 2026
What You Need for an Off-Grid Cabin
A cabin off-grid system typically requires larger, more permanent equipment than mobile setups. Each card below links to our best-for guides with product rankings and recommendations.
Portable Power Stations
High-capacity expandable units (3,000-25,000Wh) that serve as whole-cabin power hubs. Ideal if you want a plug-and-play system without custom wiring.
- ✓ 3,000Wh+ with expansion capability
- ✓ 3,000-4,000W output for full-size appliances
- ✓ LiFePO4 for daily cycling over years
Solar Panels
Rigid monocrystalline panels for permanent roof or ground-mount installations. Sized for year-round energy harvesting, including shorter winter days.
- ✓ 800-2,000W array for typical cabin
- ✓ Rigid monocrystalline for permanent mount
- ✓ Tilt-adjustable ground mounts for snow country
Water Filtration
High-capacity gravity filters and whole-cabin inline filtration for well water, spring water, or collected rainwater.
- ✓ Gravity filter (e.g., Berkey) for drinking water
- ✓ Sediment pre-filter for well/spring sources
- ✓ UV treatment for bacterial concerns
Batteries & Charge Controllers
Large LiFePO4 battery banks (200-800Ah at 12V, or 48V rack systems) and MPPT charge controllers for a permanent solar-battery installation.
- ✓ 400-800Ah at 12V or 200Ah at 48V
- ✓ MPPT controller sized to panel array
- ✓ Battery monitor/shunt for SOC tracking
Inverters
Pure sine wave inverters or hybrid inverter-chargers (3,000-6,000W) that provide household 120/240V AC from your battery bank for lights, well pump, fridge, and tools.
- ✓ 3,000-5,000W for standard cabin loads
- ✓ 6,000W+ if running well pump or power tools
- ✓ Split-phase 240V option for heavy loads
Cabin Power Needs Checklist
Cabin loads are typically higher than mobile setups because of full-size appliances and continuous internet. Size your battery bank to cover 2-3 days of autonomy for cloudy stretches.
| Appliance | Draw | Daily Est. |
|---|---|---|
| Full-size refrigerator | 100-200W continuous | 1,200-2,400Wh |
| LED lighting (whole cabin) | 30-80W total | 180-480Wh (6h) |
| Well pump | 500-1,500W (intermittent) | 500-1,500Wh |
| Laptop & internet (Starlink) | 50-100W | 600-1,200Wh (12h) |
| Washing machine | 400-800W | 400-800Wh (1 load) |
| Power tools (occasional) | 1,000-2,000W | 500-1,000Wh |
| Space heater (electric) | 1,500W | 6,000Wh (4h) -- propane preferred |
Cabin Water Needs Checklist
Off-grid cabins source water from wells, springs, rainwater collection, or hauling. Proper filtration is essential regardless of source.
| Use | Estimated Volume |
|---|---|
| Drinking & cooking (2 people) | 2-4 gal/day |
| Dish washing | 3-5 gal/day |
| Showers (low-flow) | 5-10 gal/day |
| Laundry (1 load) | 15-20 gal/load |
| Total (2 people) | 25-40 gal/day |
Solar Sizing for Cabins
Cabin solar systems need to account for winter production drops. In northern latitudes, winter output can be 30-50% of summer. Size your array for worst-case months or plan for a backup generator.
Weekend Cabin
- Daily use: 2,000-3,000Wh/day
- Solar: 600-800W
- Battery: 200Ah LiFePO4 (12V)
Full-Time (Minimal)
- Daily use: 4,000-6,000Wh/day
- Solar: 1,000-1,500W
- Battery: 400Ah LiFePO4 (12V)
Full-Time (Comfortable)
- Daily use: 6,000-10,000Wh/day
- Solar: 1,500-2,500W
- Battery: 200-400Ah (48V system)