Single-Phase vs Three-Phase EV Charging Connection: What You Need to Know
- Apr 5
- 1 min read
When planning an EV charger installation, one of the first technical questions is whether your connection should be single-phase or three-phase. This affects both the charging speed available and the cost of the electrical work. Here's a practical guide to understanding the difference and making the right choice.
What Is a Single-Phase Connection?
A single-phase connection uses one live conductor and delivers 230V AC. In Israel, most homes are connected with single-phase supply to the main panel. A single-phase EV charger can deliver up to 7.4kW — enough to fully charge most EVs in 6–9 hours overnight. This is perfectly adequate for the majority of home users.
What Is a Three-Phase Connection?
A three-phase connection uses three live conductors and delivers 400V AC, enabling up to 22kW of charging power. Three-phase supply is standard in commercial buildings and increasingly available in newer residential developments. If your vehicle supports three-phase AC charging (check your onboard charger specs), and your location has three-phase supply, this unlocks significantly faster charging.
Which Should You Choose?
For home users with overnight charging time: single-phase is almost always sufficient and less expensive to install. For commercial sites, fleet depots, or drivers who need maximum speed: three-phase is the right investment. Greems manages both configurations equally well, with dynamic load balancing available for both single and three-phase multi-charger installations.
Not sure which connection type is right for your site? Greems' technical team can assess your setup and recommend the optimal configuration. Contact us.
