Both charge an EV’s battery, but they work differently and are suited to different situations.
What is AC charging?
AC stands for alternating current. It is the type of electricity commonly supplied by the grid.
With AC charging, electricity passes through the vehicle’s onboard charger, which converts it into the direct current (DC) needed by the battery.
AC charging is commonly used for:
- Home charging.
- Workplace charging.
- Destination charging at hotels and car parks.
It is generally suited to situations where vehicles remain parked for several hours.
What is DC charging?
DC stands for direct current. Unlike AC charging, DC charging equipment converts electricity before it reaches the vehicle’s battery.
This allows electricity to be delivered directly to the battery at higher power levels, subject to the vehicle’s charging capability.
DC charging is commonly used at:
- Motorway service stations.
- Public rapid-charging hubs.
- Commercial locations where drivers need to charge quickly.
AC vs DC charging: What’s the difference?
| AC charging | DC charging | |
|---|---|---|
| Conversion | Inside the vehicle | Inside the charger |
| Typical use | Home and workplace | Rapid public charging |
| Charging speed | Generally slower | Generally faster |
| Equipment cost | Usually lower | Usually higher |
| Best suited to | Longer parking periods | Shorter stops |
Actual charging speeds depend on charger output, vehicle capability, battery condition and other factors.
Which type of EV charging should businesses choose?
The right choice depends on how vehicles use the site.
Workplaces, residential buildings and fleet depots where vehicles park for extended periods may be well suited to AC charging. Locations with high turnover or short dwell times may need DC charging.
Some sites use a combination of both.
Businesses should also consider electrical capacity, expected demand, installation costs and how charging infrastructure will be managed as the network grows.
How does Electric Miles fit into EV charging management?
Electric Miles provides software for managing EV charging infrastructure. Its emPACT CPMS helps charge point operators and commercial charging teams manage chargers, sessions, drivers, access permissions and operational reporting.
Explore Electric Miles emPACT to learn more.
Frequently asked questions
Is DC charging faster than AC charging?
Generally, yes. DC chargers can deliver higher charging power, although the vehicle’s maximum charging rate also matters.
Can all electric vehicles use AC and DC charging?
Most modern EVs support AC charging, and many support DC fast charging. Compatibility depends on the vehicle and connector standards.
Is AC charging better for home use?
AC charging is commonly used at home because vehicles are usually parked for several hours and rapid charging is not always necessary.