Tethered vs untethered EV charger: your home choice

Choosing the right electric vehicle (EV) charger for your home is a strategic decision that impacts daily convenience, long-term flexibility, and your overall home energy management. It's a 'power play' that puts you in control of your energy consumption and costs. This guide will help you navigate the options between tethered and untethered EV chargers, empowering you to make an informed choice that aligns with your lifestyle and future energy goals.

Understanding tethered EV chargers

What is a tethered charger?

A tethered EV charger comes with a charging cable permanently attached to the unit. Think of it like a petrol pump: the hose is always connected, ready for use. When you need to charge your EV, you simply pull up, uncoil the integrated cable, plug it into your vehicle, and charging begins. This type of charger is designed for maximum convenience, as the cable is always present and stored with the unit.

Advantages of a tethered charger

The primary advantage of a tethered EV charger is convenience. The cable is always attached and ready to go, eliminating the need to retrieve a separate cable from your boot or garage every time you want to charge. This can be particularly appealing during bad weather, as you avoid handling a wet or dirty cable. Tethered units often look tidier when not in use, as the cable can be neatly wrapped around the charger or stored in an integrated holder. For most UK electric vehicles, a Type 2 connector is standard for AC charging, so a tethered charger with this connector offers immediate compatibility.

Disadvantages of a tethered charger

Despite the convenience, tethered chargers come with certain drawbacks. The fixed cable means you are limited to a specific length, which might restrict your parking options or require careful planning during installation. If you change your EV in the future to one that uses a different connector type (though less common for home AC charging in the UK), the tethered cable might become obsolete, necessitating a charger replacement or the use of an adapter. Aesthetically, a permanently attached cable, even when neatly stored, can be more visually prominent than an untethered socket.

Exploring untethered EV chargers

What is an untethered charger?

An untethered EV charger, also known as a socket-only charger, is essentially a wall-mounted socket without a permanently attached cable. To charge your electric vehicle, you use a separate charging cable, typically the one supplied with your EV, to connect the car to the charger. This design offers flexibility, allowing you to use different cables depending on your needs or vehicle.

Advantages of an untethered charger

Untethered chargers offer significant flexibility. You can use different cable lengths or types depending on the situation, which is ideal if you have multiple EVs with varying connector requirements or if you need a longer cable for occasional parking further away. This design also future-proofs your setup to some extent; if connector standards change, you only need to replace the cable, not the entire charger. From an aesthetic perspective, an untethered unit often looks more discreet and streamlined on your wall, as there's no cable visible when not in use. While untethered chargers may have a lower upfront cost, they require the separate purchase of a charging cable.

Disadvantages of an untethered charger

The main disadvantage of an untethered charger is the added step of retrieving and stowing the charging cable each time you charge. This can be less convenient, especially in adverse weather conditions, and the cable itself might get dirty or require cleaning. There's also the additional cost of purchasing a suitable charging cable, which is not included with the unit and can add to the overall expense. If you forget your cable or it's damaged, you won't be able to charge at home until you get a replacement.

Key considerations for your home

Cable length and parking

The length of your charging cable is a critical practical consideration. For a tethered charger, the fixed cable must be long enough to comfortably reach your EV's charging port from the charger's location, regardless of how you park. Measure the distance from your intended charger position to your car's charging port in various parking scenarios. For untethered chargers, you have the flexibility to choose a cable of appropriate length, but you must factor in the daily routine of handling and storing it.

Aesthetics and installation

The visual impact of your EV charger on your home's exterior is another factor. Untethered chargers tend to offer a cleaner, more minimalist look as there's no cable permanently hanging or coiled. Tethered chargers, while convenient, will always have a visible cable. Installation considerations include the physical space available for the unit itself, whether it's indoors or outdoors, and the route the cable will take to your vehicle.

Future-proofing and adaptability

Consider the long-term. While most EVs in the UK use a Type 2 connector for AC charging, an untethered charger offers greater adaptability if you anticipate owning different EV models in the future that might require a different cable type. This can save you from having to replace the entire charging unit. Smart charging capabilities are also crucial for optimising energy use, leveraging dynamic tariffs, and integrating with broader home energy management systems.

Cost implications

The initial purchase price of the charger is only part of the equation. Untethered chargers often have a lower upfront cost, but this doesn't include the separate purchase of a charging cable. A quality Type 2 charging cable can add a significant amount to the total cost. Installation costs will be similar for both types, but remember to factor in any electrical upgrades needed for your property. The OZEV EV chargepoint grant for homeowners ended on 31 March 2022, though grants remain available for flats, rental properties, and staff/fleet vehicles.

Smart charging and home energy management

Optimising with smart features

Smart charging capabilities are now a standard feature for new home charge points in the UK, subject to smart charging regulations. These features allow you to optimise when and how your EV charges. This means you can schedule charging during off-peak hours when electricity is cheaper, or even when your home solar panels are generating surplus energy. This optimisation can lead to significant cost savings and a more efficient use of energy.

Integrating with your home energy ecosystem

Choosing a smart EV charger is a key component of a larger 'power play' in home energy management. It allows you to integrate your EV charging with your broader home energy ecosystem. By leveraging smart features, you gain control over your energy schedule and costs, turning energy into a resource to play with. This aligns with a vision of abundant energy, where you can manage your EV charging alongside other home energy upgrades like solar and batteries, making informed, future-proof decisions.

Making the right decision for your EV

Assessing your needs

The choice between a tethered and untethered EV charger ultimately depends on your personal circumstances and priorities. Evaluate your daily charging routine: do you value ultimate convenience, or is flexibility more important? Consider your parking situation, the aesthetic impact on your home, and your budget, including the cost of a separate cable for untethered units.

Long-term benefits of an informed choice

Making an informed decision about your EV charging setup is an investment in your home's energy future. By considering convenience, cost, aesthetics, and future adaptability, you empower yourself to create a charging solution that not only meets your current needs but also integrates seamlessly into a smart, efficient home energy ecosystem. This thoughtful approach ensures you're not just charging your car, but also optimising your energy use and costs for years to come.