🔋 Battery Backup Calculator

UPS/Inverter backup time, EV Bike battery backup, or EV Car battery backup & range — all in one place.

Enter the capacity of one battery in Ah. Example: 100 Ah, 150 Ah, 200 Ah.
Enter the voltage of one battery. Common values are 12V, 24V and 48V systems.
Enter how many batteries are connected to your inverter/system.
Enter the total power consumption of all appliances running together.
If you are unsure, 80–90% is a reasonable general estimate.
This accounts for the percentage of battery capacity that you actually use.
Estimated Backup Time
0 hrs 0 mins
(0 hours)
Total Battery Energy 0 Wh
Usable Energy 0 Wh
Battery Bank 0 V
Backup Time = (Battery Ah × Battery Voltage × Number of Batteries × Efficiency × Usable Capacity) ÷ Total Load
⚠️ This calculator provides an estimated backup time. Actual backup can vary depending on battery age, temperature, battery type, inverter performance, wiring losses and actual appliance load.

EV Bike / Scooter Battery Backup Details

Example: most electric scooters use 2–4 kWh batteries.
Lower Wh/km means better efficiency. Typical scooters: 25–45 Wh/km.
Battery percentage actually used before recharging.
Enter your electricity price per unit.
Typical charging loss is around 5–15%.
Used to estimate daily charging cost.
Estimated Backup Range
0 km
on usable battery charge
Full Charge Cost ₹0
Cost Per KM ₹0
Daily Charging Cost ₹0
Monthly Estimate ₹0

📊 Battery Summary

Your EV bike/scooter can travel approximately 0 km on a usable battery charge.

Backup Range = (Usable Battery kWh × 1000) ÷ Efficiency (Wh/km)
* Estimates are approximate. Actual range depends on speed, traffic, riding style, temperature, tyre pressure, payload and road conditions.

EV Car Battery Backup Details

Example: compact EVs 30–45 kWh, long-range EVs 60–100 kWh.
Lower Wh/km means better efficiency. Typical EV cars: 130–180 Wh/km.
Battery percentage actually used before recharging.
Enter your electricity price per unit.
Typical charging loss is around 5–15%.
Used to estimate daily charging cost.
Estimated Backup Range
0 km
on usable battery charge
Full Charge Cost ₹0
Cost Per KM ₹0
Daily Charging Cost ₹0
Monthly Estimate ₹0

📊 Battery Summary

Your EV car can travel approximately 0 km on a usable battery charge.

Backup Range = (Usable Battery kWh × 1000) ÷ Efficiency (Wh/km)
* Estimates are approximate. Actual range depends on speed, traffic, driving style, temperature, tyre pressure, payload and road conditions.