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What is the difference between tethered and untethered EV Chargers?

28 January 202628 January 2026

When choosing an EV charger in the UK, one of the first decisions you’ll face is whether to go tethered or untethered. While the terminology might sound technical, the choice comes down to how you plan to use your charger day-to-day.

Our EV-IQ range is designed and manufactured to ensure that all solutions for both home and commercial use are considered and covered.

Cable vs. Socket

The primary distinction is how the charging cable is handled:

Tethered EV Charger: Features a permanently attached cable. You park up, grab the cable from its holster, and plug directly into your car – much like a petrol pump.
Untethered EV Charger (Socket-only): Features a universal Type 2 socket but no attached cable. You use your own portable charging cable (usually the one supplied with your vehicle) to bridge the gap between the charger and your car.

Protecting Your Business Investment

For businesses, fleet managers, and developers, this choice is less about convenience and more about risk management and operational efficiency.

Workplace & Office

Who is plugging in?

Assigned Company Cars: Choose Tethered. It provides a seamless experience for staff, ensuring they can plug in quickly and stay focused on their workday.
Visitors & Mixed Staff: Choose Untethered. Even though Type 2 is the UK standard, a socketed unit allows visitors with older vehicles (Type 1) to use their own adapter cables. It also ensures a professional, tidy look for client-facing car parks.

Fleet & Depot Managers

How high is your turnover?

Standardised Fleet (Same Bay Every Night): Choose Tethered. In high-pressure logistics, removing the step of fetching a cable from the boot saves time and reduces the risk of drivers “forgetting to charge”. Tethered also typically offers much faster charging times compared to untethered charging.

Varied Fleet or Third-Party Drivers: Choose Untethered. It eliminates the common maintenance headache of drivers leaving cables on the ground where they can be run over by HGVs or heavy vans. Limiting damage and unnecessary expenses for repairs.

Property Developers & Landlords

What is the priority for the site?

Aesthetics & Minimalism: Choose Untethered. Such as the 7.4kW EV-IQ. Why: Socket-only units look cleaner on the exterior of a new home and prevent “cable clutter” on driveways. It shifts the responsibility for cable maintenance (wear and tear) onto the homeowner/tenant. With over 30% of new UK car registrations now being electric, buyers expect a charger that is future-proof and visually appealing, consider future-proof as the key word here, which the EV-IQ has been designed to consider.

Retail and Amenity areas

Most property developments now include these areas; Shops, Cafes, gyms etc. Choose from our range of Tethered for these areas. Why? Because research shows that installing Rapid DC chargers can increase average visitor dwell time by up to 50%. Visitors who stay to charge often spend more money. A tethered unit from the EV-IQ range is crucial here, because your standard untethered cable cannot handle the high-power loads required for a rapid charge, as is what most people now come to expect when charging on areas like this.

Power & Speed: The DC Advantage

The “tethered vs untethered” debate takes on a technical edge when you look at charging speeds.

The 22kW AC Ceiling

Almost all untethered chargers are AC (Alternating Current). Even with a powerful three-phase supply, these max out at 22kW. Because the user provides the cable, the speed is often bottlenecked by the cable’s own rating (many are only rated for 7kW or 11kW). Check out our other blog on ‘Do all EV’s support 22kW AC charging?’ to find out more about 22kW and if it is practical for you.

Tethered-Only Rapid Charging (50kW+)

If your business requires Rapid or Ultra-Rapid charging, the choice is made for you: these units are always tethered.

Direct Current (DC): High-speed units (50kW to 350kW) send power directly to the battery, bypassing the car’s onboard converter.
Safety & Hardware: Due to extreme heat and current, DC cables are thick, heavy, and often liquid-cooled. They must be permanently attached to the unit to ensure safety and peak performance.
Bottom Line: For fleet depots where “time is money,” tethered DC chargers are the only way to charge your fleet and keep your operation moving in under 30 minutes.

AC vs. DC Speed

Charger Type	Connection Style	Max Speed	Typical Use Case
AC Standard	Untethered or Tethered	7kW – 22kW	Homes, Offices, All-day parking
DC Rapid	Tethered Only	22kW – 150kW	Fleet depots, Quick turnarounds
DC Ultra-Rapid	Tethered Only	150kW – 350kW	Motorway services, Heavy logistics

How to Decide

Still unsure? Ask yourself these four practical questions:

New housing developments? Many developers now install untethered units by default to satisfy Building Regulations Part S. They do this because it looks cleaner on the front of a house and ensures the homeowner can use whatever cable their specific car requires.
Is Health & Safety a factor? Untethered sockets remove the trip hazard of trailing cables in public spaces.
Is theft a concern? Tethered cables are harder to steal as they are fixed, but they can be targets for vandalism. Untethered cables go with the driver.
Do you need Rapid speeds? If you need over 22kW for a fleet, you must choose a Tethered DC unit.

Why EVIQ?

At EVIQ, we understand that every site is unique. Our EV chargers supports both tethered and untethered configurations, from our flagship 7.4kW residential chargers to high-performance 22kW and DC units for commercial use. We focus on durability, compliance, and future-proof power.