If you’ve ever wondered “Meri inverter battery kitne ghante chalegi?” then you’re not alone. Whether it’s for your home inverter, UPS system, or even a solar setup, knowing the exact battery backup time is very important.
With this guide and the free Battery Backup Calculator, you can quickly calculate backup time in hours by entering just three details:
🔹 Load (Watt)
🔹 Battery Capacity (Ah)
🔹 Voltage (V)
If you want to understand inverter setup in detail, check our Inverter Installation Guide
Free Battery Backup Calculator
Enter the details and click Calculate to find your backup duration:
Formula for Battery Backup Time
Backup Time (Hours) = (Battery Capacity (Ah) × Battery Voltage (V)) ÷ Load (Watts)
⚠️ Note: Actual backup time is usually 70–80% of calculated value because of inverter losses & battery efficiency.
New to electrical load calculation? Read our step-by-step Electrical Load Calculator Guide.
Battery Backup Time Calculation Table
Here’s a quick reference battery backup time calculation table (assuming 12V battery and 200W load):
| Battery Size (Ah) | Voltage (V) | Load (Watt) | Approx Backup Time (Hours) |
|---|---|---|---|
| 100 Ah | 12V | 200W | 6.0 Hours |
| 120 Ah | 12V | 200W | 7.2 Hours |
| 150 Ah | 12V | 200W | 9.0 Hours |
| 180 Ah | 12V | 200W | 10.8 Hours |
| 200 Ah | 12V | 200W | 12.0 Hours |
This makes it easy to compare different battery sizes and plan your power needs.
Example: 150Ah Battery Backup Time Calculator
Let’s calculate for a 150Ah, 12V battery with a 200W load:
Backup Time = (150Ah × 12V) ÷ 200W = 9 Hours
So, with a 150Ah inverter battery, you can expect around 8–9 hours of backup for a 200W load.
Why Use a Battery Backup Calculator?
✔ Easy inverter battery backup calculation
✔ Helps select the right battery size
✔ Prevents overloading & battery damage
✔ Saves money by avoiding oversized batteries
A battery backup calculator is the simplest way to estimate how long your inverter or UPS will last during a power cut. By understanding the relationship between battery capacity, voltage, and load, you can make smarter decisions for your home, office, or business.
Try our calculator today and use the battery backup time calculation table for quick reference. Whether it’s 150Ah battery backup or higher, you’ll always know your power availability in advance. Explore inverter battery options on Exide Official Website.