Size Your Off-Grid System
How many days between recharging opportunities
Daily Power Consumption
Typical: 4-6 hours depending on location
Off-Grid System Sizing Guide
Battery Capacity Formula:
Total Wh Needed = Daily Consumption × Days Off-Grid
With Solar Recharging:
Net Wh Needed = Total - (Solar Panel Wh × Sun Hours × Days × 0.8)
Solar Panel Sizing:
Required Solar = Daily Consumption ÷ (Sun Hours × 0.8)
The 0.8 factor accounts for charging inefficiency, non-ideal angles, and weather variability.
Off-Grid Living Tips
- Oversize your system: Add 25-50% capacity buffer for cloudy days and battery degradation
- Energy efficiency first: LED lights, efficient appliances, and good insulation reduce power needs
- Battery maintenance: Keep LiFePO4 batteries between 20-80% charge for longest life
- Expandability: Choose systems that support additional batteries and solar panels
- Backup plan: Have a small gas generator for extended cloudy periods
- Monitor usage: Track daily consumption to optimize your system