How to Calculate Inverter Backup
Calculating inverter backup is crucial for ensuring your power supply can meet your demands during outages. This calculator helps you determine the battery size needed to support your load for a specified duration.
- Enter the total wattage of your load.
- Enter the desired runtime in hours.
- Enter the efficiency of your battery.
- Click ‘Calculate’ to see your results.
The formula used is: Battery Size (Ah) = (Wattage * Runtime) / (Battery Voltage * Battery Efficiency).
Real-World Examples
Example 1: A 1000W load running for 4 hours with a 90% efficient battery would require a battery with a capacity of 4444 Ah.
Example 2: A 2000W load running for 6 hours with an 85% efficient battery would require a battery with a capacity of 15873 Ah.
Example 3: A 500W load running for 8 hours with a 95% efficient battery would require a battery with a capacity of 4286 Ah.
Data & Statistics
| Wattage (W) | Runtime (hours) | Battery Efficiency (%) | Battery Size (Ah) |
|---|---|---|---|
| 1000 | 4 | 90 | 4444 |
| 2000 | 6 | 85 | 15873 |
| 500 | 8 | 95 | 4286 |
Expert Tips
- Consider using a higher battery efficiency for better performance.
- Regularly maintain your batteries to ensure optimal performance.
- Always round up your battery size to ensure you have enough capacity.
Interactive FAQ
What is inverter backup?
Inverter backup is the amount of time your inverter can power your load after the main power source has failed.
How do I calculate inverter backup?
You can use the calculator above to calculate inverter backup. Enter your load’s wattage, desired runtime, and battery efficiency, then click ‘Calculate’.
Understanding Battery Storage – U.S. Department of Energy
Battery Storage Technologies for Grid Support – National Renewable Energy Laboratory