Essentials Blog

Wallbox. DC charging station for your home?

Wallbox DC Ladestation für Zuhause

Actually, I want to write a lot more about e-mobility here than I have managed in the last few months. But at the moment we have a sideproject, which takes up a lot of our free time (I hope that we can tell you more about it by the end of the year at the latest). In addition, our electric everyday life with the BMW i3 and the Wallbox Pulsar (here again the test video of the Pulsar) works so smoothly that we were able to convince two friends of e-mobility in the meantime. But apart from that little new has happened. Until now!

Last week we were able to use our good relations to the Spanish E-Charging-Startup Wallbox and arranged to meet Jörg (Sales Manager Germany) and Enric (CEO of Wallbox) at the eMove360° in Munich. And what the two had to tell was really very, very exciting.

MyWallbox and more new features

Jörg already showed us the new software of Wallbox (myWallbox), which will be rolled out soon on iOS and Android as well as in the web application. We were able to test the beta version and are looking forward to using it. The design looks very modern and tidy and further features like voice recognition and – still a little nebulous – services based on artificial intelligence (AI) will be added.

The update also fixes problems that can still occur sporadically at present, so that all existing Wallbox models like the Pulsar, the Commander (this will appear in a revised version): Wallbox Commander 2.0) and the Copper. We will soon be able to report much more about the Wallbox Copper, we are currently installing a new Copper (in black). Test follows :-)

Der neu DC Lader für Daheim

Wallbox DC Charging Station for your home

But we were particularly interested in something else at the Wallbox booth: For the first time, Wallbox exhibited a compact DC charger for home and professional usage. This is something special in the sense that although there are lots of compact AC chargers for home use (and this was also visible at the trade fair) and also many DC chargers for professional use, but hardly any company offers DC chargers for home use. To my knowledge only Webasto had introduced an affordable DC charger, which has been postponed to 2020 in the meantime.

Thus, the DC prototype of Wallbox should become one of the first, if not the first DC charging station for home use that can be afforded. Wallbox CEO Enric showed us the device itself, which we were also allowed to view from the inside (we are not allowed to write anything about this at the moment), how compact the design is through the use of the latest technology, so that it can also be safely installed in your own home. The charging station will thus not only offer a clear speed advantage over AC charging (not necessarily in theory, but above all in practice -> see explanatory text below). A core feature of the new DC charging box is particularly exciting: it is completely designed for bidirectional charging. The bidirectional converter technology developed for this purpose enables interaction between power generation, storage and charging of the electric vehicle at home. Wallbox’s DC charging station will be able to perform Vehicle-to-Home (V2H) and Vehicle-to-Grid (V2G) power feeds. As soon as we have more information, we will report about it here. Stay tuned.

DC Lader von Wallbox

Technical details about DC charging

AC or DC Charging? 

AC charging“ and „DC charging“ refer to the two types of charging that are based on different types of current. Alternating current (AC) refers to current that changes its direction in regular repetitions. In direct current (DC), strength and direction do not change. Batteries in electric cars can only be charged with direct current; however, since current from the public grid is alternating current, a rectifier and charging electronics are required (for AC charging, the vehicle must have this functionality). DC charging stations contain this technology even inside the device, and are therefore much more complex and expensive. In Europe, it is becoming clear that electric vehicles can handle both types of charging (at least for an extra charge). With AC charges one has to distinguish between Type 1 and Type 2 connections on the car, with DC charges the competitors are CHADemo and Combined Charging System (CCS). Here, too, a combination of Type 2 for AC charging and for CCS on the DC charger seems to be developing as standard in Europe.

So why DC Charging for home usage

… if it is more expensive and more complex?

With DC charging, significantly higher charging currents can be achieved, so that significantly more range can be gained with the same charging time. The conditions become even clearer if the maximum values (43 kW for AC versus 350 kW for DC) cannot be exhausted for various reasons. For example, the unbalanced load detection and a single-phase charger on the vehicle can mean that the new Hyundai Kona, for example, can only charge with about 4 kW at AC, while it can be charged quickly at DC up to 70 kW. This is therefore a speed advantage of more than ten times. Basically, it can be assumed that all single-phase charging cars will benefit from the future Wallbox DC charger. Particularly in the case of usage patterns that require frequent rapid charging, it becomes so clear that there will be many use cases for DC charging at home in the future.

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