1. What is the 100Ah Battery Run Time Calculation?

The 100Ah battery run time calculation estimates how long a 100 amp-hour battery will last powering a specific load. It's essential for designing power systems and understanding battery capacity.

2. How Does the Calculator Work?

The calculator uses the battery run time equation:

Where:

• 100 — Battery capacity in amp-hours (Ah)
• \( V \) — System voltage (volts)
• Load W — Power consumption of the load (watts)

Explanation: The equation converts battery capacity to watt-hours (Ah × V) then divides by load power to determine runtime.

3. Importance of Battery Run Time Calculation

Details: Accurate run time estimation is crucial for sizing battery banks, ensuring uninterrupted power supply, and planning energy usage in off-grid systems.

4. Using the Calculator

Tips: Enter system voltage in volts and load power in watts. All values must be positive numbers for valid calculations.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all battery types?
A: The calculation provides theoretical maximum. Real-world results may vary due to battery chemistry, temperature, discharge rates, and age.

Q2: What's the difference between Ah and Wh?
A: Amp-hours (Ah) measure charge capacity, while watt-hours (Wh) measure energy capacity (Ah × V). Wh accounts for voltage differences.

Q3: How does battery depth of discharge affect runtime?
A: Most batteries shouldn't be discharged 100%. For lead-acid, 50% DoD is typical, effectively halving available capacity.

Q4: What about inverter efficiency?
A: If using an inverter, multiply load power by 1.1-1.2 to account for typical 80-90% inverter efficiency losses.

Q5: Can I use this for battery banks?
A: For multiple batteries in parallel, multiply the Ah rating (e.g., 200Ah for two 100Ah batteries). Series connections increase voltage.