The difference between an AC and a DC EV charger is where the power gets converted. Your battery stores DC power. With an AC charger, your car's onboard charger converts the AC from the grid into DC, so charging speed is limited by that onboard charger. A DC charger does the conversion itself and feeds DC straight to the battery, which is why it can charge much faster. For most cars at home, AC is the right choice. DC makes sense for fleets, public charging and quick top-ups.
How an AC charger works
An AC charger supplies alternating current to the car. Inside the car, the onboard charger turns it into DC and charges the battery.
• Charging speed is capped by the car's onboard charger, typically 3.3 kW or around 7 kW in cars sold in India
• The charger itself is simpler, smaller and cheaper to install
• It runs on a home's single-phase supply
• It suits anywhere a vehicle is parked for hours: homes, offices, apartment parking
How a DC fast charger works
A DC charger contains its own power conversion hardware. It skips the car's onboard charger and talks directly to the battery management system.
• Much faster, because speed is no longer limited by the onboard charger
• Larger, heavier and more expensive hardware
• For cars, it needs a high-power, usually three-phase supply
• Best where vehicles need a quick top-up: highways, fleets, public hubs, visitor parking
AC vs DC at a glance
AC charger
• Power conversion: in the car
• Speed: limited by the car's onboard charger
• Best for: overnight or all-day parking
• Supply: single-phase for most home units
• Installation: simpler
DC fast charger
• Power conversion: in the charger
• Speed: much faster, limited by the charger and the battery
• Best for: quick top-ups and high-use fleets
• Supply: higher load, often three-phase
• Installation: more space and a bigger electrical connection
Do you need a DC charger at home?
For an electric car, almost certainly not. A car parked overnight for eight or more hours charges fully on a 3.3 kW or 7.4 kW AC charger. A DC charger for a car would need far more power than most homes are sanctioned for, and costs much more to buy and install.
Two- and three-wheelers are different. Their batteries run at low voltage, and compact DC chargers built for light EVs exist. For a household with an electric scooter or a family running a three-wheeler for income, a low-voltage DC charger can cut charging time meaningfully without a large load upgrade.
The practical answer:
• Electric car at home: choose AC. Match the charger to your car's onboard charger.
• Electric two-wheeler or three-wheeler, charging overnight: an EV charging socket for your portable charger is enough.
• Two-wheeler or three-wheeler that needs quick daytime top-ups: consider a light-EV DC charger with a compatible connector.
Where each type fits outside the home
• Offices: AC for employees parked through the working day; DC for visitors, executives and delivery vehicles that need a quick top-up. Our commercial EV charging guide covers both.
• Housing societies: AC chargers in residents' parking, since cars sit overnight
• Fleets and depots: DC for vehicles that turn around between shifts, AC for overnight charging
• Shops and cafes: fast top-ups for two-wheelers while the rider stops
Kazam AC and DC chargers
AC chargers for cars
• Kazam Zip Pro: 3.3 kW AC charger with app control and scheduling
• Kazam Zoom: 7.4 kW single-phase AC charger with a Type 2 connector
DC charger for two- and three-wheelers
• Kazam Zap Pro: light-EV DC charger with power options from 3 kW to 8 kW, single or dual gun, Type 6, Type 7 and Chogori connectors, and 4G, Wi-Fi and Bluetooth monitoring. Built for fleets, public and commercial points, and shopfront parking.
Not sure which your car supports? Our 7.4 kW vs 3.3 kW guide explains how to check your onboard charger.
Frequently asked questions
What is the difference between an AC and a DC EV charger?
An AC charger relies on the car's onboard charger to convert power, so the onboard charger sets the speed. A DC charger converts the power itself and charges the battery directly, which is faster.
Which is better, an AC or a DC charger?
Neither is better everywhere. AC suits places where vehicles park for hours, such as homes and offices. DC suits places where vehicles need a fast top-up, such as fleets and public hubs.
Can I install a DC fast charger at home?
For an electric car it is rarely practical, because of the power needed and the cost. For two- and three-wheelers, compact low-voltage DC chargers are an option.
Does DC fast charging damage the battery?
Modern EVs manage DC charging through their battery management system. Many drivers still charge on AC day to day and use DC when they need speed.
Do all EVs support DC fast charging?
No. Check your vehicle's specifications for DC charging support and the connector type before choosing a DC charger.
Choose the right charger
For home charging, book a free home assessment. For fleets and commercial sites, contact Kazam to plan the right mix of AC and DC.
