Advantages and installation: all you need to know about the Wallbox

Published by on 11.14.2019 - 5 min

At home or at the office, the Wallbox is often the most popular solution among electric vehicle drivers. This device has many advantages, being a more reliable and faster way to charge than through a regular power outlet.

One of the many advantages of having an electric car is being able to charge it at home. You just need to figure out how to go about it, both quickly and safely. Your potential solution is… the Wallbox.

What is a Wallbox?

A Wallbox is a charging station for electric vehicles, which takes the form of a wall-mounted box. It can be installed in a private garage or a condominium or company parking lot. Several electric vehicle manufacturers, including Renault, recommend opting for this solution.

How does a Wallbox work?

The wall-mounted box is connected to the electrical panel by a dedicated circuit that can take a greater load that a regular domestic circuit. The Wallbox is equipped with electronic features that safeguard it against the risk of overheating.  It can run diagnostic tests on itself, and also offers smart charging, to take advantage of off-peak hours, for example.

What are the advantages of a Wallbox?

ZOE charging wallbox

Electric vehicle drivers who have opted for a Wallbox at home enjoy its many advantages.

Optimal safety

This piece of equipment can deliver a high-wattage power supply for several hours without posing any risk to the electric system, keeping the home and its occupants safe. Its components are designed to prevent any power surges. The same can’t necessarily be said of regular power outlets, which are not recommended for charging over a long period (except for the Renault Twizy).

A shorter charging time

Whether 3.7 kW, 7.4 kW or 22 kW, the wattage of a Wallbox will be much higher than that of a regular domestic power outlet (2.3 kW). Consequently, the charging time is significantly lower. For example, a new ZOE will reach full charge, i.e. a range of 395 kilometers WLTP*, in 9 hours 25 minutes thanks to a 7.4 kW Wallbox, compared to 16 hours 10 minutes via a reinforced Green’up power outlet.

Which kind of Wallbox should I choose for my Renault ZOE?

Several models are available on the market, offering solutions to suit the electric systems of homes and businesses. It all depends on the meter wattage and the way the electricity is carried (single phase or triple phase, with most private individuals using single-phase meters). Single-phase domestic electric systems are enough to charge a ZOE with a 7 kW Wallbox. If your electric system has a triple-phase supply, you can even opt for a 22 kW box.
With this information to hand, the electric vehicle manufacturer will guide their customer to a contractor who can offer the most suitable solution to the future buyer.

How do you install a Wallbox?

The contractor will show you the best location for the box and take care of installation, including a diagnostic test of the domestic electric system, notably measuring the resistance of the grounded socket. Once the power supply is shut off, the Wallbox is hooked up to the electric panel. This generally takes from one to five hours.

NB: In an increasing number of countries, such as France, Spain, Japan and India, any electric vehicle driver living in a condominium has the right to the installation of a charging outlet on their parking space.

What’s the price of a Wallbox?

The prices vary between manufacturers, but generally lie somewhere between 500 and 1,000 euros. On top of this, the installation cost is 300 to 600 euros. bring the cost down, in many cases you can qualify for government aid. In France, this takes the form of tax credits: private individuals can deduct 30% of the installation cost of a Wallbox from their tax bill. There are also incentives in other countries. In England, for example, some 75% of the cost is reimbursed, up to 500 pounds.


Copyrights : Jean-Brice Lemal, Paulo Calisto