What is a wallbox and how does it work?
Wallboxes are charging points for electric vehicles. They can be installed in private homes or company parking lots. You may have seen them in public garages, too. Wallboxes are powered by alternating current (AC). Electric vehicles charge significantly faster at a wallbox than when plugged into a regular wall socket. Stand-alone boxes are available in locations where wall-mounting is not an option.
Wall-mounted charging station.
Wallboxes are usually mounted to garage walls. They support charging with up to 22 kW (depending on your vehicle‘s on-board charger and on your actual domestic power supply).
Stand-alone charging station.
Stand-alone charging points for private households can be placed in garages, parking lots, or carports. They can charge up to two electric cars at the same time with up to 11 kW each (depending on your vehicle‘s on-board charger and on your actual domestic power supply).
Do you need all the power you can get?
The power of wallboxes installed in private households ranges from 2.3 to 22 kW, depending on the car and the building's electric circuit.
It’s simple math.
Larger electric vehicle batteries take longer to fully charge and higher wallbox power means faster charging. When it comes to the power of a wallbox, all of the following factors will be considered:
The power of the on-board-charger of your car.
More powerful on-board-chargers can receive higher inputs from the wallbox, increasing charging speeds.
Your car's total battery capacity.
Higher capacity batteries take longer to fully charge. More wallbox power means quicker charging.
The building's power supply (circuit size).
The amount of power the building's electric circuit can provide may limit the amount of power the wallbox can deliver, limiting the charging speed.
A qualified electrician knows how to figure those numbers out for you.
7.2 kW Wallbox, or more.
The current KONA Electric with a 39.2 kWh battery has a 7.2 kW on-board charger, so a wallbox with 7.2 kW is sufficient. If you upgrade to the 10.5 kW on-board charger, you can install a wallbox with 7.2 or 11 kW.
7.2 or 11 kW Wallbox.
The KONA Electric with a 64 kWh battery can come with a 7.2 or 10.5 kW on-board-charger, so you can use a 7.2 kW wallbox for both as well. But charging would be much faster for the KONA Electric with a 10.5 kW on-board-charger with an 11 kW wallbox (7 h 30 min compared to 9 h 35 min).
7.2 kW Wallbox, or more.
The current IONIQ Electric with a 38.3 kWh battery has a 7.2 kW on-board-charger, so a wallbox with 7.2 kW will be sufficient. Of course, you can always install a wallbox with more power than you currently need – and be ready for the future of Hyundai electric vehicles.
These are the typical costs for wallbox installation:
- Hardware = between 500 and 2.500 Euros
- Installation = between 800 and 1.000 Euros
If that feels like a lot, don't worry many countries and regions have government grants and tax breaks available for private charging-stations.