Granny Charger or Type 2 Cable: Which One Do You Need?

You arrive at a holiday home, hotel or relative’s house without a dedicated EV charge point. There is only a standard household socket nearby.

Can you use the Type 2 cable already in your boot? Do you need an adapter, or should you carry a granny charger instead?

The confusion usually comes from the term “Type 2 charging cable”. It can refer to different types of charging equipment, even though they are not designed for the same power source.

What is a granny charger?

A granny charger, also commonly called a granny cable, is a portable Mode 2 EV charger designed to connect an electric vehicle to a compatible electrical socket.

The informal name is particularly familiar to drivers in Ireland and other English-speaking European markets. Depending on the country and retailer, the same equipment may also be described as a portable EV charger, Mode 2 charging cable, household-socket EV charger, domestic plug charging cable or emergency charging cable.

A typical granny charger includes:

• a compatible plug or approved adapter at the power source;
• an in-cable control box;
• a Type 2 connector at the vehicle;
• a cable connecting these components.

The control box is an essential part of the equipment. Depending on the charger, it can communicate with the vehicle, regulate the charging current, monitor temperature and detect certain electrical faults.

A granny charger is therefore more than a cable with two different plugs.

Is a granny charger the same as a Type 2 cable?

Not necessarily. In everyday use, a Type 2 cable often means a cable fitted with a Type 2 connector at both ends: one for the vehicle and one for the charge point.

This is known as a Type 2-to-Type 2 cable, a T2–T2 cable or a Mode 3 charging cable. It is used with a public charge point or an untethered wallbox equipped with a Type 2 socket.

A granny charger may also have a Type 2 connector at the vehicle end. However, the other end connects to a compatible household, campsite or industrial socket, and the cable includes an in-line control unit. It is therefore a portable Mode 2 EV charger, not a simple Type 2-to-Type 2 cable.

The words “Type 2” normally describe the vehicle-side connector. They do not tell you what type of power source the charger can use.

Can you plug a Type 2 cable into a household socket?

No, not directly. A household socket does not have a Type 2 connection. It also does not provide the same control functions as a dedicated EV charge point.

A simple mechanical adapter does not replace the control equipment required between the electrical supply and the vehicle.

If your destination only has a household socket, you need either a granny charger with a compatible fixed plug or a portable EV charger with an approved interchangeable adapter for that socket.

Can a granny charger use a standard household socket?

Yes, provided that the charger is compatible with the socket and the electrical installation is suitable.

A standard household socket is not the same as a dedicated EV charge point. It may also differ from a reinforced or dedicated socket available in certain European markets.

The charging current must reflect:

• the socket type;
• the condition and capacity of the circuit;
• the local electrical installation;
• the charger and adapter specifications;
• applicable electrical requirements.

If the installation is old, damaged or unfamiliar, have it checked by a qualified electrician before charging.

When does charging from a household socket make sense?

A granny charger is particularly useful for occasional or moderate charging needs. It may be suitable for:

• overnight top-ups;
• a holiday home or second residence;
• staying with friends or relatives;
• a plug-in hybrid;
• lower daily mileage;
• temporary charging at a known location;
• a backup charger carried in the vehicle.

In these situations, flexibility may be more important than speed. The aim may not be to recharge the entire battery, but to recover enough range for the next journey.

A household socket may be less suitable when the vehicle requires a substantial recharge every day, daily mileage is high, parking time is limited or the electrical installation is old or unknown. In these cases, a dedicated home charge point or wallbox installed on an appropriate circuit will generally be the better long-term solution.

How fast is a granny charger?

The charging speed depends on more than the maximum rating printed on the charger. Actual charging power is determined by:

• the socket;
• the electrical circuit;
• the permitted charging current;
• the plug or adapter being used;
• single-phase or three-phase availability;
• the vehicle’s onboard charger;
• the charger’s maximum capacity.

The lowest limit determines the final charging power. Connecting a portable charger capable of 7.4 kW or 11 kW to a standard household socket does not make that power available. The charger must operate within the limits of the socket and the local electrical installation.

Seven checks before using a granny charger

1. Identify the socket. Determine whether it is a household, dedicated, campsite or industrial socket.
2. Use the correct plug or approved adapter. Do not rely on an ordinary travel adapter to connect an EV charger to an incompatible socket.
3. Inspect the socket. Do not charge from a socket that is loose, damaged, discoloured or showing signs of overheating.
4. Select an appropriate charging current. Do not automatically select the charger’s highest setting.
5. Avoid improvised connections. Ordinary extension leads, multi-socket adapters and cable reels may introduce additional points of heat.
6. Check the thermal protection. It provides an additional safeguard but does not replace a correctly installed electrical circuit.
7. Monitor the first charging session. Stop charging if you notice excessive heat, a burning smell, unusual noise or an error message.

Can you use a granny charger outdoors?

The charger’s environmental rating and the location of the electrical connection both matter. A weather-resistant control unit does not automatically make an indoor domestic socket suitable for outdoor charging.

The plug-and-socket connection must be protected from rain, standing water and physical damage. The cable should not cross a public footpath, create a trip hazard, become trapped under a door or pass through an area where vehicles may drive over it.

If outdoor charging will be frequent, installing a properly located home charge point may be more practical than repeatedly routing a portable cable from the property.

Should you carry a granny charger or a Type 2 cable?

For wider coverage, it can make sense to carry both.

A Type 2-to-Type 2 cable connects the vehicle to public AC chargers and untethered wallboxes. A granny charger provides an alternative when no dedicated charge point is available but a compatible electrical socket can be used safely.

A driver travelling across Europe may therefore keep:

• a Type 2-to-Type 2 cable for dedicated charge points;
• a portable granny charger for compatible electrical sockets.

It is not a question of which cable is universally better. The correct choice depends on the infrastructure available at a particular location.

PC200-3k6 or PC200 Pro: which should you choose?

Once you have identified the socket, available power and expected charging frequency, choosing a portable charger becomes more straightforward.

The decision is not only about maximum charging power. It is also about the level of flexibility required: will you normally charge from one known socket configuration, or will you travel between locations with different socket types? That distinction helps determine whether the PC200-3k6 or PC200 Pro is the more suitable option.

The maximum rating of either charger should not be applied automatically to every socket. The charging current must always be appropriate for the available electrical supply.

Granny charger or home wallbox?

If household-socket charging becomes daily, too slow or inconvenient, installing a dedicated home charger may be more appropriate. The granny charger can then remain useful for travel, occasional charging and emergencies.

For a public AC charge point or untethered wallbox, use a Type 2-to-Type 2 Mode 3 cable. For a compatible household socket, use a granny charger or another suitable portable Mode 2 charger.

The correct choice depends not only on the Type 2 port at the vehicle, but also on what is available at the other end of the cable.