Question 1

What does the kWh/100km value mean for electric cars?

Accepted Answer

The kWh/100km value indicates how many kilowatt-hours of electrical energy an EV requires per 100 km. Typical values: 13–16 kWh/100km (compact cars), 20–25 kWh/100km (large SUVs).

Question 2

How do you calculate gasoline-equivalent consumption?

Accepted Answer

Gasoline has a calorific value of approx. 8.9 kWh/L. Formula: kWh/100km ÷ 8.9 = Liter-equivalent/100km. An EV with 18 kWh/100km equivalent to approx. 2.0 L gasoline-equivalent.

Question 3

What is Wh/km and who uses it?

Accepted Answer

Wh/km is an alternative unit used primarily by Tesla and North American users. 1 kWh/100km = 10 Wh/km. A Tesla Model 3 with 130 Wh/km consumes 13 kWh/100km.

Question 4

Does the calculator account for charging losses?

Accepted Answer

No, the calculator uses the trip computer consumption without charging losses. Real AC charging losses are approx. 10–15%. Add 10% to the consumption for a conservative calculation.

Question 5

How big is the difference between WLTP and real-world consumption?

Accepted Answer

The WLTP consumption for EVs is 15–25% below real-world consumption. In winter, consumption can be 30–50% higher due to heating. Always use the trip computer value.

Question 6

Why is the liter equivalent important for comparison?

Accepted Answer

'2.0 L equivalent' is immediately understandable for everyone - and shows: EVs are more efficient than a combustion engine could ever be. The comparison bridges the gap between kWh and liters.

Question 7

What does battery degradation mean for consumption?

Accepted Answer

Battery degradation means that the usable capacity decreases over time (~2–3%/year). The kWh/100km consumption remains largely constant - only the range decreases.

Question 8

How much CO₂ does an electric car save in Austria?

Accepted Answer

Austria has approx. 70% renewable energy sources. The CO₂ factor is approx. 80–120 g/kWh. An EV with 18 kWh/100km produces approx. 14–22 g CO₂/km vs. 130–180 g/km for a gasoline car.

Question 9

Is it true that EVs are more efficient in city traffic?

Accepted Answer

Yes! Recuperation (energy recovery during braking) can recover 15–25% of the kinetic energy. Combustion engines lose this energy as heat. The EV advantage is greatest in city traffic.

Question 10

What is the energy content of diesel compared to gasoline?

Accepted Answer

Diesel: ~9.7 kWh/L, Petrol: ~8.9 kWh/L. 18 kWh/100km corresponds to only ~1.86 L Diesel/100km. Therefore, the diesel equivalent is even more impressive.

How efficient is your Electric Car really?

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