1. What is the mAh Calculation?

The mAh (milliamp-hour) calculation converts watt-hours to battery capacity at a specific voltage. This is essential for solar panel systems to properly size battery banks and understand energy storage capacity.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Watt\text{-}Hours \) — Energy capacity of the battery (Wh)
• \( Volts \) — Nominal voltage of the battery (V)
• 1000 — Conversion factor from amp-hours to milliamp-hours

Explanation: The formula converts energy capacity (watt-hours) to charge capacity (mAh) by accounting for the battery voltage.

3. Importance of mAh Calculation

Details: Knowing the mAh rating helps determine how long a battery can power devices, compare batteries of different voltages, and properly design solar power systems.

4. Using the Calculator

Tips: Enter watt-hours (from battery specifications) and battery voltage (typically 3.7V for lithium-ion, 12V for lead-acid). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why convert watt-hours to mAh?
A: Many devices specify power requirements in mA, making mAh a more practical unit for runtime calculations.

Q2: What's a typical mAh for solar batteries?
A: Solar batteries range from 2,000mAh (small systems) to 200,000mAh+ (large installations), depending on voltage and capacity.

Q3: Does temperature affect mAh?
A: Yes, battery capacity decreases in cold temperatures - actual mAh may be 10-20% lower in freezing conditions.

Q4: How does voltage affect mAh?
A: Higher voltage batteries show lower mAh for the same energy capacity (Wh), but deliver more power.

Q5: Can I use this for battery banks?
A: Yes, but for series connections use bank voltage, for parallel connections sum the mAh values.