1. What is EV Efficiency?

Electric vehicle efficiency measures how many miles an EV can travel per kilowatt-hour of battery energy consumed. It's a key metric for comparing energy consumption between different electric vehicles.

2. How Efficiency is Calculated

The calculator uses the efficiency formula:

Where:

• Range — Total distance the vehicle can travel on a full charge (miles)
• Battery Capacity — Total energy storage capacity of the battery (kWh)

Explanation: This simple division gives the miles per kilowatt-hour, which indicates how efficiently the vehicle uses its stored energy.

3. Importance of Efficiency

Details: Higher efficiency means the vehicle can travel farther with the same battery capacity, reducing charging costs and potentially increasing battery life.

4. Using the Calculator

Tips: Enter the vehicle's advertised range in miles and its battery capacity in kilowatt-hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good efficiency rating?
A: Most EVs achieve 3-4 miles/kWh. Ratings above 4 are excellent, while below 3 indicate less efficient vehicles.

Q2: Does efficiency change with driving conditions?
A: Yes, efficiency decreases in cold weather, at high speeds, or with aggressive driving.

Q3: How does efficiency compare to MPG?
A: 3 miles/kWh is roughly equivalent to 100 MPGe (miles per gallon equivalent).

Q4: Can I use this for real-world efficiency?
A: Manufacturer range estimates may be optimistic. For real-world efficiency, use actual miles driven divided by kWh consumed.

Q5: Does battery degradation affect efficiency?
A: No, efficiency measures energy use per mile. Degradation reduces total range but not necessarily efficiency.