1. What is Inverter Battery Backup Time?

The inverter battery backup time is the duration for which a battery can power connected loads through an inverter before needing recharge. It's crucial for power outage planning and system sizing.

2. How Does the Calculator Work?

The calculator uses the backup time formula:

Where:

• \( Ah \) — Battery capacity in amp-hours
• \( Voltage \) — Battery voltage (typically 12V, 24V, or 48V)
• \( Watts \) — Total load connected to the inverter

Explanation: The formula calculates how long a battery can sustain a given load by dividing the total battery energy (Ah × V) by the power consumption (W).

3. Importance of Backup Time Calculation

Details: Accurate backup time estimation helps in selecting appropriate battery capacity, planning for power outages, and ensuring critical loads remain powered.

4. Using the Calculator

Tips: Enter battery capacity in Ah, battery voltage in volts, and total load in watts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: This provides theoretical maximum. Actual backup time may be 10-30% less due to efficiency losses, battery age, and temperature.

Q2: What's typical backup time for home inverters?
A: Typically 4-8 hours for essential loads, but depends on battery capacity and load size.

Q3: Should I consider inverter efficiency?
A: For more accuracy, divide result by inverter efficiency (typically 0.85-0.95 for good inverters).

Q4: Does battery type affect backup time?

Q5: How can I increase backup time?
A: Options include adding more batteries in parallel, reducing connected load, or using higher capacity batteries.