Battery Backup Calculator

Pro Practical Estimator

1. Battery & System Setup

Battery Voltage (V)

Capacity (Ah)

Battery Type (Depth of Discharge)

Inverter Efficiency (%)

Charger Rating (Amps)

2. Connected Loads

Total: 0W

Item Name

Qty

Watts

Total

Estimated Backup Time

0h 0m

Full Calculation Report

Total Load 0 W

Req. Inverter Size 0 VA

Usable Energy 0 Wh

Est. Charge Time 0 Hours

Step-by-Step Math

Ah × V × DoD × Eff% Total Load (W)

= 0 H

💡 How to maximize backup:

Turn off appliances you aren't actively using.
Use energy-efficient BLDC fans and LED lights.
Avoid high-surge appliances like ACs, Geysers, or pumps during power cuts.
Maintain your battery (check water levels if Lead-Acid/Tubular).

Disclaimer: This calculator provides theoretical estimates. Actual backup time may vary based on battery age, temperature, wire resistance, and real-time inverter efficiency curve.