1. What is Battery Inverter Duration?

The battery inverter duration calculation estimates how long a battery will last when powering devices through an inverter. It's crucial for sizing battery banks and planning backup power systems.

2. How Does the Calculator Work?

The calculator uses the battery duration formula:

Where:

• \( Ah \) — Battery capacity in amp-hours
• \( V \) — Battery voltage (typically 12V, 24V, or 48V)
• \( W \) — Inverter power output in watts

Explanation: The formula converts battery capacity to watt-hours (Ah × V = Wh) then divides by power consumption to get runtime.

3. Importance of Battery Duration Calculation

Details: Accurate duration estimation helps prevent power outages, ensures proper system sizing, and helps balance cost versus performance in battery systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What affects actual battery duration?
A: Temperature, battery age, discharge rate, inverter efficiency (typically 85-95%), and depth of discharge limits all affect real-world performance.

Q2: How do I account for inverter efficiency?
A: Divide the result by the inverter efficiency (e.g., for 90% efficient inverter, divide by 0.9).

Q3: What's a typical battery voltage?
A: Common voltages are 12V (small systems), 24V (medium), and 48V (large systems).

Q4: Can I use this for lithium batteries?
A: Yes, but lithium batteries can typically discharge deeper (80-100%) than lead-acid (50%).

Q5: How do I calculate for multiple batteries?
A: For parallel connections, sum the Ah. For series, sum the voltage but keep Ah the same.