Solar System Calculator

Off-Grid Solar System Sizing Tool

Choose options that best describe your setup

1. Your Household Type: Tiny home or weekend cabin (Low usage) Small family home (Moderate usage) Large home or high load (Heavy usage) 2. Average Sunlight Hours (NZ region): Northland (5.0 hrs) Waikato/Bay of Plenty (4.5 hrs) Wellington (4.0 hrs) Canterbury (3.8 hrs) Southland (3.5 hrs) 3. Days of Battery Autonomy: 1 day (minimal backup) 2 days (typical) 3+ days (extended autonomy) 4. System Voltage: 24V (standard) 12V (legacy/small) 48V (efficient/large) 5. Inverter Use: Minimal (1000W) Fridge + TV + devices (2000W) Full home (3000W+) 6. Surge Load Estimate: Minimal loads (2000W) Average household (4000W) Large tools / pumps (6000W+) Calculate My System