A tethered EV charger has its charging cable permanently attached, while an untethered charger has a socket and uses a separate removable cable. Tethered units are usually more convenient for everyday charging. Untethered units offer more flexibility over the cable you use and leave less cable permanently attached to the wall.
Key Takeaways
- Tethered: the charging cable stays permanently attached to the wallbox.
- Untethered: you connect a separate compatible charging cable whenever you charge.
- Tethered chargers favour everyday convenience; untethered chargers favour cable flexibility.
- Your vehicle, parking position, cable reach and installation layout should all be considered before choosing.
Tethered vs untethered EV chargers at a glance
The difference is mainly about how the charging cable connects to the wallbox. It does not, by itself, determine the charger's charging speed, smart features or suitability for your electrical installation.
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What is a tethered EV charger?
A tethered EV charger includes a charging lead permanently connected to the wallbox. When you park, you take the attached connector from its storage position and plug it into the vehicle.
Why people choose tethered chargers
The main advantage is convenience. The cable is already at the charging point, so there is no separate lead to remove from the vehicle, connect and put away after every charging session.
What to check first
The attached cable needs to suit the vehicle and reach the charging inlet comfortably from the normal parking position. Cable storage also matters because the lead remains outside with the charger.
A tethered charger can therefore work particularly well where the same vehicle is parked in a predictable position each day and the fitted cable reaches comfortably without crossing an awkward route.
What is an untethered EV charger?
An untethered EV charger has a socket rather than a permanently attached charging lead. You use a separate compatible cable, connecting one end to the wallbox and the other to the vehicle.
Why people choose untethered chargers
The removable cable gives you more flexibility. If your cable requirements change, the cable can be considered separately from the wallbox rather than being permanently built into the charging unit.
The everyday trade-off
You need access to the charging lead each time you use the charger. That adds an extra connection step and means the cable needs its own suitable storage when it is not being used.
An untethered wallbox can also look less cluttered when the vehicle is away because there is no long charging cable permanently hanging from the unit.
Which is better: tethered or untethered?
Neither design is automatically better for every home. A tethered charger is usually the simpler choice if you want the quickest possible routine when parking and charging. An untethered charger is better suited to people who prefer a removable cable or want more flexibility over the charging lead.
Consider these points before deciding:
- Your current vehicle: the connector and cable must be compatible with the car.
- Future vehicle changes: an untethered unit lets you change the removable cable without replacing it as part of the charger.
- Parking position: the cable must comfortably reach the vehicle's charging inlet.
- Daily convenience: a permanently attached lead reduces the number of steps each time you charge.
- Cable storage: decide whether you prefer the cable to remain with the charger or be stored separately.
Tethered does not mean faster, and untethered does not mean slower. Charging performance depends on the charger, vehicle and electrical supply rather than simply whether the cable is permanently attached.
Think about the parking position before the cable type
A convenient charger can become frustrating if the cable does not reach the vehicle naturally. Before selecting a unit, consider where the car normally sits, which side of the vehicle the charging inlet is on and how the cable will travel between the wallbox and the car.
This is particularly relevant with a tethered charger because the cable length is fixed as part of the chosen unit. Our guide to the best location to install an EV charger at home explains the positioning question in more detail.
Tethered and untethered are not EV charging modes
The cable arrangement and the charging mode describe different things. Tethered and untethered tell you whether the charging lead is permanently attached. Charging modes describe how the vehicle and charging equipment connect and control the charging process.
If you are comparing these terms while choosing a home wallbox, the separate guide to EV charging Modes 1–4 explains that distinction without mixing cable type with charging method.
What should be checked before installing either type?
Choosing tethered or untethered is only one part of planning a home charging point. The installation also needs to suit the property, vehicle and proposed charging position.
An EV charger installation assessment can consider the existing electrical supply, consumer unit, available capacity, proposed charger position, cable route and the charging setup you intend to use.
The cable should also be positioned and stored so it can be used without creating an unnecessary obstruction around the driveway, garage or parking area.
A simple way to make the decision
Choose a tethered charger if your priority is straightforward daily charging and you are happy for the cable to remain permanently attached to the wallbox.
Choose an untethered charger if you prefer a socket-only unit, want the charging lead to be removable or value the option of changing the cable separately later.
Before buying either type, check the vehicle connection, normal parking position and cable reach. These practical details often make a bigger difference to daily use than the appearance of the charger itself.
Planning a home EV charger?
RCD Electrical can assess the proposed charger location, electrical supply and charging requirements before installation, including tethered and untethered options.
EV charger installation in London