The Difference in One Paragraph
A tethered EV charger has the charging cable permanently attached to the wall unit — like a petrol pump, the cable is always there. An untethered charger (also called a socketed or universal charger) has just a Type 2 socket, and you plug in your own cable each time, usually the one that came with the car. Same charging speed, same electricity cost, same grant eligibility — the difference is entirely about how you live with it day to day.
Quick Comparison
| Tethered | Untethered (socketed) | |
|---|---|---|
| Daily routine | Pull up, plug in | Get cable from boot, connect both ends, reverse after |
| Look on the wall | Cable visible (coiled or holstered) | Cleaner unit, no cable |
| Cable length | Fixed (typically 5m) | Your choice — buy the length you need |
| Cable security | Attached to the unit | Loose cable can be stolen if left out |
| Wet mornings | Plug in one end | Handle a damp cable, twice |
| If the cable fails | Repair/replace via the unit | Just buy a new cable |
| Charging speed | Identical — set by the unit and your supply (7.4kW single-phase at home) | |
What "Tethered" Means in Practice
The cable is part of the unit. You park, lift the connector off its holster, plug into the car, and charging starts on whatever schedule you've set. In the morning you hang it back up. There's nothing to store in the boot and nothing to forget.
The trade-offs are real but small. A coiled cable on the wall is more visible than a bare socket. And the length is fixed at install time — typically 5 metres — so the unit's position needs to suit how you actually park. That's a positioning decision your installer makes with you on the day, and it's one reason we ask for photos and a video of the parking spot before quoting.
What "Untethered" Means in Practice
The wall unit is just a smart socket. Each charge means fetching your cable, connecting charger-end then car-end, and packing it away after — or leaving it plugged in, where an unsecured cable (worth €150-€250 to replace) can walk away. In Irish weather, handling a wet cable twice a day is the part most owners come to resent.
The upsides: the unit looks tidier on a visible front wall, and you control cable length — useful for awkward parking layouts. If a cable is ever damaged, you replace the cable rather than dealing with the unit.
Does Connector Type Matter?
Not in Ireland in 2026. Every new EV sold here — Tesla, VW, Hyundai, Kia, BYD, the lot — uses a Type 2 inlet for AC home charging. A tethered Type 2 cable fits all of them. Type 1 only appears on some older imports, and adapters exist for those. The "future-proofing" argument for untethered units assumes a connector change that the EU standardised away years ago.
Worth knowing: one Type 2 charger serves a two-EV household fine — you swap the connector between cars, not the charger. The constraint is scheduling, not hardware.
Which Should You Choose?
Tethered, for most homes. If you charge overnight on a driveway — which is how the economics of night-rate home charging work best — the plug-in-and-walk-away routine wins, and it keeps winning every wet November morning.
Untethered earns its place when the unit must sit on a prominent front elevation and you care about the cleaner look, or when an unusual parking layout needs a non-standard cable length.
This is also what we install: our standard unit is a 7.4kW smart charger with a tethered 5m Type 2 cable. It's on the SEAI Smart Charger Register, so it qualifies for the €300 grant, and it's installed by a Safe Electric registered electrician as part of our €1,299 all-in package — €999 after the grant. We chose a tethered unit deliberately, for the reasons above.
Cost, Grant and Installation
Tethered vs untethered makes little difference to price in the Irish market once you account for buying a decent standalone cable for a socketed unit. What matters for cost:
- The SEAI grant applies to both — €300 flat, provided the charger is on the Smart Charger Register and a Safe Electric registered electrician installs it. Details in our grant guide.
- Installation is the same job either way: a dedicated circuit from your fuseboard, protective devices, testing and certification. See what happens on installation day.
- Running cost is identical — it's set by your electricity tariff, not the charger style. On 2026 EV night rates that's roughly €1-€1.60 per 100km; run your own numbers in the cost calculator.
Bottom Line
Tethered means the cable lives on the wall; untethered means it lives in your boot. Charging performance is identical. For a typical Irish driveway and daily overnight charging, tethered is the more convenient choice — which is why it's our standard installation. If you're ready to get one on the wall, start with the photo assessment; it takes a few minutes and tells you whether your home qualifies for the standard €1,299 install.