Single-Phase or Three-Phase? A Guide to the Right Power for Home EV Charging
Is your home single-phase or three-phase? We explain in plain language how to find your phase information from your meter and subscription details, what you need for 7.4 kW, 11 kW and 22 kW charging, how your vehicle's on-board charger limits charging power, and the right charging solution for your installation.
When you start researching home chargers, the first technical question you usually run into is this: “Does your home have single-phase or three-phase power?” The answer directly determines the highest charging power you can reach at home, which device suits you and what to expect during installation. And a three-phase home is not enough on its own; how your vehicle accepts charging matters just as much as the electrical installation.
In this guide we explain, in plain language, the difference between single-phase and three-phase power, how to tell which one your home has, what you need for 7.4 kW, 11 kW and 22 kW charging, and which charging solution makes sense for your installation.
What are single-phase and three-phase power?
With single-phase power, energy arrives over one phase conductor and one neutral. The voltage at standard household sockets in this system is about 230 V; in everyday Turkish usage it is often still called “220 volts”.
With three-phase power, energy arrives over three separate phase conductors and a neutral. The voltage between phases is about 400 V, commonly referred to as “380 volts”. Sockets in a three-phase home are still 230 V; the difference is that a much higher total power can be carried safely.
Think of it like a motorway: single-phase is a one-lane road, three-phase is a three-lane road. Vehicles travelling at the same speed carry three times as much load in the same time on three lanes.
How does the number of phases determine charging power?
Two basic values determine power in AC charging: the number of phases and the current drawn from each phase (amps). The standard power levels you will come across at home are:
| Connection | Current | Approximate charging power | Typical use |
|---|---|---|---|
| Single-phase | 16A | ~3.5 – 3.7 kW | Portable charging from a grounded household socket |
| Single-phase | 32A | ~7.4 kW | Single-phase wallbox on a dedicated circuit, or a portable charger on a suitable circuit |
| Three-phase | 16A | ~11 kW | Three-phase wallbox or portable charger |
| Three-phase | 32A | ~22 kW | Three-phase wallbox or portable charger on a suitable installation |
The key takeaway from the table: on a single-phase installation, the upper limit you can reach at home is about 7.4 kW. 11 kW and 22 kW charging require a three-phase installation. We explained which type of device is used at each of these power levels in our EV Charging Modes guide.
How can you tell whether your home is single-phase or three-phase?
There are a few practical ways to find out. None of them requires opening the distribution board or the meter cover — and you shouldn't.
1. Check the label on your electricity meter
The label on the front of the meter shows the voltage rating. If you see something like 3x230/400 V, your meter is three-phase. If it only says 230 V, you most likely have a single-phase connection. Three-phase meters may also show phase indicators (L1, L2, L3) on the display or label.
2. Look at the main circuit breaker
Without opening the board cover, you can look at the main breaker on its front. On three-phase supplies, the main breaker is usually a three-pole unit joined side by side, switched on and off with a single lever. On single-phase supplies, the main breaker is narrower, with a single-pole (or phase-neutral) design. This gives you an idea but is not conclusive on its own.
3. Check your subscription details
Your electricity bill, supply contract or your distribution company's online service channels contain details about your connection. If you are unsure, your distribution company's customer service can tell you the number of phases and your contracted capacity.
4. Have an electrician measure it
This is the most reliable method. A qualified electrician will check both the number of phases and whether your board, wiring and grounding are suitable for the charging load in the same visit. This check is a step that should be done before any charger installation anyway.
A three-phase home doesn't mean your car charges on three phases
This is the most commonly overlooked point. In AC charging, it is the vehicle's on-board charger (OBC) that converts electricity into a form the battery can use. Some vehicles' on-board chargers can use all three phases, while others only charge over a single phase. A significant share of plug-in hybrids and some compact electric cars in particular accept single-phase charging only.
A vehicle that accepts single-phase charging will draw energy from only one phase even when connected to a three-phase charger. In that case, the power you get is limited by the current that can be drawn from that phase:
| Installation and charger | If the vehicle accepts three-phase 11 kW | If the vehicle accepts single-phase 7.4 kW only |
|---|---|---|
| Single-phase, 16A | ~3.5 – 3.7 kW | ~3.5 – 3.7 kW |
| Single-phase, 32A | ~7.4 kW | ~7.4 kW |
| Three-phase, 16A (11 kW charger setting) | ~11 kW | ~3.5 – 3.7 kW (16A from one phase) |
| Three-phase, 32A (22 kW charger setting) | ~11 kW (vehicle's limit) | ~7.4 kW (32A from one phase) |
In other words, the actual charging power is always the smallest of what the installation, the charger and the vehicle can accept. You can find your vehicle's AC charging power and phase information in the charging section of the owner's manual or in the technical specification brochure. To calculate your own charging time with this value, see our How to Calculate EV Charging Time guide. Plug-in hybrid owners will find the details in our PHEV Charging Guide.
Don't forget your contracted capacity
Having a three-phase installation doesn't mean you can draw unlimited power. Your subscription's contracted capacity determines the total power your home can draw at once. In the evening, when the oven, air conditioner, water heater and charger run together, this limit can be stretched.
- If you plan to charge at high power, find out your current contracted capacity from your distribution company.
- If needed, you can apply to your distribution company to change your contracted capacity; conditions and the process may vary by region.
- A charger with adjustable current makes it easier to limit power to your home's capacity.
- Shifting charging to night hours, when household consumption drops, both balances the load and can lower costs. We covered this in our EV Night Tariff guide.
Which solution makes sense in a single-phase home?
Charging up to 7.4 kW is possible in a single-phase home, and for many drivers this is more than enough for overnight charging. Over an 8-hour night, roughly 59 kWh of energy can theoretically be delivered at 7.4 kW.
- Plug-in charging, no installation: WiseCar WTP1 runs at a fixed 3.5 kW and is designed for use with standard grounded household sockets.
- For two power levels: WiseCar WTP2 lets you switch between 3.5 kW (16A) and 7.4 kW (32A) modes at the touch of a button. The 7.4 kW mode requires a suitable circuit and socket.
- A fixed, smart wall-mounted solution: WiseCar WTL 7.4 kW Single-Phase delivers up to 7.4 kW at 32A on a 230 V single-phase supply without needing a three-phase connection; you can start and stop charging and adjust the current through the mobile app.
- A tidy, protected charging point: For portable chargers, consider the WiseCar Fused 2+1 Combination Panel (Single-Phase).
Which solution makes sense in a three-phase home?
If you have a three-phase installation and your vehicle accepts three-phase charging, 11 kW becomes available, and 22 kW with a suitable installation and vehicle. Even if your car only accepts a single phase today, a three-phase charger keeps your infrastructure ready for when you change vehicles.
- Wall-mounted: WiseCar WTA3 offers 11 kW and 22 kW power options. WiseCar WTL provides up to 22 kW of AC charging power with a 32A current capacity. On both models you can adjust the current from the mobile app.
- No wall available: For open car parks or gardens, the WTL with Stand or WTA with Stand options are available.
- Portable and flexible: WiseCar WTP3 offers adjustable power options of 3.5 kW, 7.4 kW, 11 kW and 22 kW. Thanks to the 220V socket adapter included in the box, you can also use a standard socket connection where the infrastructure allows; this makes it possible to use the same device both in a three-phase home and in a single-phase holiday home.
- Three-phase socket point: For portable chargers on three-phase systems, the WiseCar C50 Fused 2+1 Combination Panel (Three-Phase) can be used.
Should you switch from single-phase to three-phase?
This decision is usually less urgent than people think. These questions make it easier:
| Your situation | Recommendation |
|---|---|
| The car is parked at home overnight and your daily mileage is moderate | Single-phase 7.4 kW is usually enough |
| Your car only accepts single-phase charging | Switching to three-phase won't speed up charging |
| Your car accepts three-phase 11 kW and you need to charge quickly during the day | A three-phase upgrade is worth considering |
| There is more than one electric car in the household | Three-phase with sufficient contracted capacity is an advantage |
| You are building a new home or renovating | Planning for three-phase from the start makes sense |
Switching to three-phase may require an application to the distribution company and changes to the meter and installation. So first check whether your vehicle actually benefits from three-phase charging. For general charger selection, see our How to Choose an EV Charger guide as well.
Installation and safety
Whether single-phase or three-phase, a fixed charger needs a dedicated circuit to the charging point, cable cross-section and circuit breaker suited to the current it will carry, residual current protection and sound grounding. Simply fitting a larger breaker for more power without “upsizing” the cable cross-section creates a serious overheating risk. This work must always be carried out by a qualified electrician. In the provinces where the service is available, you can use the WiseCar Charging Station Installation Service.
WiseCar chargers feature an 8-layer protection system consisting of over-temperature, over-current, under- and over-voltage, circuit, overload, residual current and IP65 outdoor protection.
Frequently Asked Questions
Can an 11 kW or 22 kW charger be used in a single-phase home?
11 kW and 22 kW cannot be reached on a single-phase installation; the upper limit is about 7.4 kW. Some adjustable-power chargers can be used at lower power levels on a single-phase supply, but in that case the charging power stays at the level the installation allows.
Is there a difference between 220 V and 230 V?
In everyday use they mean the same thing. The nominal voltage of the household grid in Türkiye is 230 V; “220 volts” is a habit carried over from the past. Likewise, the nominal phase-to-phase voltage of the three-phase system people call “380 volts” is 400 V.
How do I find out whether my car supports three-phase charging?
The AC charging power and phase information are listed in the charging section of the owner's manual or in the technical specifications. Vehicles with a stated AC charging power of 11 kW or 22 kW generally accept three-phase charging. If in doubt, ask an authorised service centre or dealer.
Why does my car only charge at 3.7 kW in a three-phase home?
Most likely your car only accepts single-phase charging and your charger is running at 16A. In that case the car draws 16A from one phase. Check how many amps your car accepts on a single phase, and review your charger's current setting and the installation as well.
Can a three-phase charger be used with a single-phase car?
Yes. A three-phase charger with a Type 2 connection also works with cars that accept single-phase charging; the car simply draws energy from the phase it can use. That is why a three-phase charger offers flexible infrastructure for different vehicles.
Conclusion
The right answer to “single-phase or three-phase?” comes from looking at your home's installation and the power your car accepts together. In a single-phase home, charging up to 7.4 kW is enough for most drivers charging overnight. A three-phase installation opens the door to 11 kW and 22 kW, provided your car supports it. First find out your phase information from your meter and subscription details, then check your car's AC charging values and have your installation measured by an electrician.
To find the charging solution that suits your installation, browse WiseCar products or get support from the WiseCar Call Centre on 444 999 1.
This content is for general information purposes. Charging power varies depending on the vehicle model, on-board charger, charging device, installation and contracted capacity. Conditions for changing contracted capacity and phase may differ between distribution companies. All work on electrical installations must be carried out by a qualified electrician.
