Electric Car Charging Times: From 11 kW Charging to Ultra-Fast Charging

How long does it take to charge an electric car at a public charging station? This is definitely one of the most frequently asked questions among those new to zero-emission mobility. There’s no single answer: charging times vary significantly depending on the charging station’s power output, the vehicle’s battery capacity, and the car’s electronic architecture.

Short answer: It ranges from 15–20 minutes for a quick stop on the highway at an Ultra-Fast HPC station (to recharge to 80%) to 4–6 hours for a full charge at a public 11-kW or 22-k AC r city charging station.

1. Short answer: How long does it really take to recharge?

Understanding how charging times vary is key to rescheduling your travel habits without stress. With an electric car, the paradigm shifts: you no longer wait until the tank is empty to “fill up,” but instead use the time the car is parked (while you’re working, grocery shopping, having lunch, or staying overnight) to recharge it.

2. Fundamental Difference Between AC Charging AC DC Charging

The main factor determining the energy transfer rate is the type of current supplied by the charging station:

Alternating CurrentAC)

Public AC charging stations AC with typical power ratings ranging from 7.4 kW to 22 kW) supply alternating current—the same type of electricity found in the residential power grid. Car batteries, however, can store energy only in the form of direct current. For this reason, the energy supplied by the charging station must be converted by a component inside the vehicle: the on-board charger (OBC).

The maximum AC charging power AC therefore limited by the capacity of this internal converter. If we connect a car equipped with an 11-kW charger to a 22-kW charging station, the car will draw a maximum of 11 kW.

Direct CurrentDC)

DC , and HPC charging stations—with power outputs that can reach up to 400 kW in the most advanced models—supply direct current directly to the vehicle’s battery, bypassing the onboard charger. The current is converted within the charging station, where large power converters are integrated. This allows for the delivery of high levels of energy in a very short time, significantly reducing charging times.

3. Factors Affecting Actual Charging Times

In everyday use, the charging speed listed on the product specifications may vary due to various technical and environmental factors:

• Maximum power accepted by the vehicle: Each vehicle has a maximum power limit set by the manufacturer (both for AC and DC). For example, a 350-kW charging station will never deliver 350 kW to a car designed to draw a maximum peak power of 100 kW.
• Battery Temperature and Thermal Management: Lithium-ion batteries operate optimally within a temperature range of 20°C to 30°C. In winter, at temperatures near or below freezing, the initial charging process will be slower until the vehicle’s climate control system has warmed up the battery pack.
• Initial State of Charge (SoC): The battery absorbs energy at its fastest rate when it is discharged (between 10% and 50%) and this rate tends to decrease gradually as the battery recharges.
• Power Sharing: At multi-outlet charging stations, when two or more vehicles connect to the same charging station at the same time, the total available power may be divided among the outlets, temporarily reducing the charging speed for each vehicle.

4. Practical Examples of Charging in Everyday Life

To better understand how to incorporate charging into your daily routine, let's look at the most common use cases:

• Work or overnight charging (AC , 7.4 kW – 11 kW): The car remains parked in a garage, in the company parking lot, or at a hotel for 6–8 hours. During this time, 100% of the range is conveniently restored with minimal strain on the batteries.
• Errands or shopping in the city (AC , 22 kW / DC , 50 kW): A 45- to 60-minute stop at the mall or during your lunch break allows you to charge between 20 kWh and 40 kWh, enough to travel 150 to 250 km in the city.
• Highway driving (HPC DC , 150 kW – 300+ kW): By stopping at a rest area for the time it takes to have a coffee and use the restroom (about 15–20 minutes), the latest-generation cars can recharge between 10% and 80% of their battery capacity, allowing them to continue the journey for another 250–300 km.

5. Comparison Table: Battery Capacity vs. Charging Power

The times listed in the table below are estimates of the time required to charge the battery from 10% to 80%:

*Important note regarding 22 kW “ AC ” charging stations: Most public AC charging stations in the area deliver up to 22 kW. However, over 90% of electric cars on the market are equipped with an onboard charger limited to 11 kW. The charging times listed in the “AC , 22 kW” column therefore reflect the actual charging time for most vehicles (based on an effective power draw of 11 kW). For models with a native 22 kW charger (e.g., Renault Zoe), the times listed at AC should be halved.

⚠️ Warning: These values are theoretical estimates calculated under optimal environmental conditions (temperature of approximately 25°C). Actual data may vary depending on the vehicle’s technical specifications, the state of health (SoH) of the battery pack, and the actual power output from the grid.

6. Charging Curve and Why It’s Best to Stop at 80%

Anyone who drives an electric vehicle quickly learns the “80% rule.” When charging with high-power direct current (DC), the energy delivery does not follow a straight line but rather a charging curve managed by the vehicle’s software to protect the lithium-ion battery chemistry:

1. Initial phase (10%–80%): The battery can handle high power without overheating excessively. Charging is fast and efficient.
2. Final phase (80%–100%): Once 80% is reached, the internal resistance of the cells increases, and the system drastically reduces the charging power to prevent cell degradation and overheating.

Consequently, going from 80% to 100% might take the same amount of time as going from 10% to 80%. During long highway trips, it makes much more sense from a time perspective to pause the charging session at 80% and resume it later, scheduling the next stop for when the battery has discharged again.

7. FAQs on Electric Car Charging Times

How long does it take to charge at 11, 22, 50, or 150 kW?

With an average 60 kWh battery, it takes about 5 hours at 11 kW (AC), about 3 hours at 22 kW (only if the car supports 22 kW AC), about 60 minutes at 50 kW (DC), and about 20–25 minutes at 150 kW (DC) to go from 10% to 80%.

What factors affect the actual charging time?

The main factors are the power output of the charging station, the maximum power accepted by the car's charger, the total battery capacity, the ambient/battery temperature, and the initial state of charge.

Why does the charging power drop below 80%?

The reduction in power is managed by the car's electronic system (BMS) to prevent the lithium cells from overheating and to extend the battery's service life.

Does the car always use the full power of the charging station?

No. The actual charging speed is always determined by the lower of the maximum power output of the charging station and the maximum power input capacity of the vehicle.

About Powy

Powy a company that owns, develops, and manages Italy's leading independent network of public charging infrastructure for electric vehicles.

Founded in Turin, Italy in 2018, Powy is at the center of the transition to more sustainable mobility, offering an innovative charging infrastructure that uses only 100 percent renewable energy.

Powy 's network includes quick, fast, and ultra-fast charging solutions strategically placed in public and private parking lots, supermarkets, shopping malls, and transportation hubs to ensure maximum convenience and accessibility for EV drivers. Each station is equipped with advanced technologies to provide a reliable and efficient charging experience.

Learn more: wpowy.energy