Single-Phase or Three-Phase? Which Charger Suits Your Home?
The question that most often causes confusion when buying an EV charger for your home is usually this: should I buy single-phase or three-phase (3 phases)? This is really a decision about your electrical installation, one that comes before any choice of brand or model. The right answer depends on your home's electrical infrastructure and your daily habits. In this guide we compare the two options with their real technical values and explain clearly which user each one suits.
What is the difference between single-phase and three-phase?
The difference lies in how many phases the electricity reaching your home is carried on. Single-phase means one phase and carries roughly 230 volts. In Türkiye most homes have a single-phase connection; that is, your home most likely has single-phase electricity. Three-phase means three phases and can carry more power at the same time at roughly 400 volts. Because it can transfer more energy in the same period, three-phase speeds up charging, but it requires a 3-phase connection and an installation to match.
- Single-phase (1 phase, ~230 V): on a home wallbox the practical upper limit is around 7.4 kW (32 A). Most residential connections are of this type.
- Three-phase (3 phases, ~400 V): on a wallbox it can go up to 22 kW (32 A). It charges faster, but requires a 3-phase connection and installation.
7.4 kW or 22 kW? How much does the charging time change?
To make the two options concrete, imagine you plug your car in for the night. A single-phase wallbox at 7.4 kW loads roughly 59 kWh into your car in about 8 hours. That more than covers most drivers' daily needs, that is a range of a few hundred kilometres. A three-phase wallbox at 22 kW transfers about 3 times as much energy in the same period. So for users who cover very high mileage each day, charge at the workplace or supply more than one car at a single point, three-phase offers a meaningful advantage.
| Feature | Single-phase | Three-phase (3 phases) |
|---|---|---|
| Number of phases | 1 phase (~230 V) | 3 phases (~400 V) |
| Wallbox power limit | ~7.4 kW (32 A) | Up to 22 kW (32 A) |
| Energy loaded in ~8 hours | ~59 kWh | ~3 times more |
| Connection required | Usually already in place | 3-phase connection/installation |
| Best suited to | Home, daily urban use | Workplace, high mileage, several cars |
In short: single-phase / 7.4 kW is enough for most users who charge at home overnight and whose daily range does not exceed a few hundred kilometres. Three-phase / 22 kW makes sense for drivers who want to shorten the charging time, cover long distances each day or use it in intensive scenarios such as a workplace.
How do I find out the phase of my home?
There are a few clues you can turn to in order to find out whether your home is single-phase or three-phase. Your electricity bill or your connection type may include phase information. Looking at your distribution board (fuse box), the appearance can be a clue typical of a three-phase installation. But these are only for forming an idea; for a definite answer you must consult a qualified electrician. Only an expert can properly assess the phase configuration, the carrying capacity of the existing line and, if necessary, the possibility of switching to three-phase.
Safety is the most important heading here. Installing a charger is electrical work that runs at high power; the cable cross-section, the protective equipment and the earthing must be chosen correctly. Having the installation carried out by a qualified electrician and ensuring appropriate protective measures (a residual current device, for example) is necessary both for your safety and for the healthy operation of the device. This article offers general guidance; leave the definite installation decisions to an expert who inspects the site.
Which phase do Bemis chargers work with?
The good news is this: if you choose the right device, it can accommodate your phase decision flexibly. Across the whole Bemis wallbox family the power is adjustable between 3.7 and 22 kW. That way the same device adapts to both single-phase and three-phase installations according to your wiring; during installation you set the power according to your existing infrastructure. The entry model Charger 2 is adjustable across the same range; the difference is that it does not offer the OCPP and metering options of the higher models. All models have a Type 2 connector.
- Charger Plus 2: power adjustable between 3.7 and 22 kW; suits both single-phase and three-phase installations, Type 2 connector.
- Charger Pro 2: power adjustable between 3.7 and 22 kW; suits both single-phase and three-phase installations, Type 2 connector.
- Charger 2: the entry model, adjustable between 3.7 and 22 kW; Type 2 connector.
So if you are undecided about the phase, or if you are thinking of moving to three-phase later, a model with adjustable power gives you flexibility: today it runs at lower power on your single-phase installation, and when your circumstances change it can be set to a higher power. The soundest route is to determine the right power and installation settings together with the electrician who sees your wiring.
See the Type 2 wallbox models whose power can be adjusted to your installation and choose the solution best suited to your home.
See the Wallbox ModelsFrequently Asked Questions
Should I buy a single-phase or three-phase charger for my home?
That depends on your electrical infrastructure and your usage. In Türkiye most homes have a single-phase connection, and a single-phase wallbox at around 7.4 kW comfortably covers most daily needs over a night. If you cover very high mileage each day, will charge at the workplace or will supply more than one car at a single point, three-phase, which can go up to 22 kW, makes sense. For a definite answer we recommend having the phase configuration of your home checked by a qualified electrician.
Is a single-phase charger enough?
For most home users, yes. The practical upper limit of a single-phase wallbox in a home is around 7.4 kW (32 A), and at that power roughly 59 kWh is loaded in about 8 hours. That means a daily range of a few hundred kilometres and is more than enough for normal urban use. If you generally charge your car at home overnight, single-phase is a practical and economical solution. If a shorter charging time is your priority, you can consider three-phase.
Is three-phase charging really faster?
Yes. Three-phase runs at roughly 400 volts and, because it can carry more power at once, a wallbox can go up to 22 kW. In the same period it transfers roughly 3 times more energy than single-phase at 7.4 kW. However, this speed requires a 3-phase connection and a suitable installation. It also matters that your car's own onboard charger supports this power; so before investing you should check both your wiring and your car's capacity.
How do I find out whether my home is single-phase or three-phase?
Your electricity bill or connection type may contain phase information, and the appearance of your distribution board can also give you an idea. But these are only preliminary clues. Only a qualified electrician who inspects the site can determine with certainty the phase configuration, the capacity of the existing line and, if necessary, the possibility of switching to three-phase. As this is a high-power installation, always have this assessment and the installation itself carried out by an expert.
Does a Bemis charger work on both single-phase and three-phase?
Because the power of the Charger Plus 2 and Charger Pro 2 models can be adjusted between 3.7 and 22 kW, they adapt to both single-phase and three-phase installations; during installation the power is set according to your existing infrastructure. The entry model Charger 2 is adjustable across the same range; the difference is that it does not offer the OCPP and metering options of the higher models. All models have a Type 2 connector. The most accurate approach is to determine which model and which power setting suits you together with the electrician who sees your wiring.
