AC Charging Explained: The Everyday EV Charging Guide for Drivers and Businesses
Do you know your AC from your DC? How about level 1 from level 3? In the world of EVs, knowing the difference between hardware and electrical standards could mean the difference between a one-hour charge and an overnight one…
- AC charging (Level 2) is the most practical everyday charging method for most EV drivers, delivering a full charge overnight at home or during a workday.
- It uses a 240V dedicated circuit and delivers 3.7 to 22 kW, adding 30 to 80 km of range per hour.
- For businesses, AC charging is the most cost-effective way to offer charging at workplaces, car parks, and destination sites.
- Understanding AC vs DC helps drivers and operators choose the right charger for the right context.
If you've just got an EV, or you're a business thinking about adding charging to your site, AC Level 2 charging is almost certainly the place to start. Here is everything you need to know. For a technical operator overview, see our AC charging glossary entry.
What is AC charging?
AC stands for alternating current, which is the type of electricity supplied by the grid. Level 2 AC charging takes that grid power at 240V and delivers it to your EV via a dedicated charging station. The car's onboard charger converts it from AC to DC (the type batteries store) before it goes into the battery.
The result is a charging speed of roughly 30 to 80 km of range per hour, fast enough to fully replenish a typical EV overnight or add meaningful range during a few hours at work.
AC vs DC: what is the difference?
The key difference is where the power gets converted. With AC charging, the vehicle's own onboard charger does the conversion inside the car. With DC fast charging (Level 3), the conversion happens inside the charging station itself, which allows for much higher power delivery and faster charging speeds.
Think of AC charging as a steady, efficient fill: ideal when the car will be parked for several hours. DC fast charging is for when you need range quickly and only have 20 to 30 minutes.
When should you use AC charging?
- Overnight at home: plug in before you go to bed and wake up to a full battery. For most drivers' daily mileage, this is all they ever need.
- At work: charge during office hours. A standard workday provides more than enough time for a full charge at Level 2 speeds.
- At a hotel or restaurant: destination chargers at hospitality venues let you top up while you're there anyway.
- At a retail park or car park: a two-hour shop can add 60 to 100 km of range on a 22 kW charger.
AC charging for businesses: is it worth it?
For businesses, AC charging is typically the most cost-effective way to offer EV charging. The hardware is cheaper to install than DC fast chargers, the grid connection requirements are lower, and the use cases (workplace, hospitality, retail) naturally suit longer dwell times where slower charging is not a problem.
With the right platform, a business can use Dynamic Load Management to run multiple AC chargers on an existing grid connection, set different rates for employees versus visitors, and monitor usage and revenue from every location in one place.
What about Level 1 and Level 3?
Level 1 (trickle charging) uses a standard wall socket and is very slow, best thought of as a last resort. Level 3 (DC fast charging) is built for speed and is ideal for long-distance travel and commercial fleets needing rapid turnarounds. For a full breakdown of all three levels and how connectors work, see our complete guide to EV charging systems and levels.
Getting started with AC charging
For drivers, the first step is a home wallbox installation. For businesses, speak with our team to find the right AC charging setup for your site, or explore how Spirii Connect manages AC networks at scale.
Explore market insights and operate your charging business effectively with our resources.
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