Load & Battery Calculator

Add appliances or use presets. Calculator shows total power, daily energy, inverter sizing and battery Ah required for the backup hours you choose.

Add Appliance
Quick presets:
Appliance W (each) Qty Hours/day Total W
Items: 0
Assumptions & Settings
Total Load
0 W
Daily Energy
0 Wh / day
Recommended Inverter
0 VA
Battery Capacity
0 Ah
Calculation Details
How calculations work
  1. Daily energy = Watt × Qty × Hours
  2. Inverter VA ≈ Total Watt × 1.2
  3. Battery Ah = (Total Watt × Backup Hours) ÷ (Voltage × DoD × Efficiency)
Visitors 100000