Safety is the main aspect - a wallbox protects against overloading
If you regularly use the purely electric range of your PHEV - and that is the point of having this type of vehicle - you will also need to charge it regularly. This results in a significant load on the power line and the socket, because a charging session of 5 hours at 2.3 kW corresponds, for example, to operating a radiant heater for the same amount of time. If, in contrast, charging is carried out using a wallbox, it is guaranteed that the cable structure is able to cope with this extraordinary load: installation by a specialist company ensures that, firstly, the cable diameter is adequately dimensioned and, secondly, additional safety mechanisms protect the household power grid. In addition, the wallbox itself prevents overloading. This means that charging is absolutely safe - in single-family homes as well as in apartment buildings.
Using a wallbox means higher charging power, ergo shorter charging times
A plug-in hybrid can be charged with 2.3 kW using a standard 230 V, 10 A household socket. Which means that with a battery capacity of 12 kWh, it takes around 5 hours to charge from 0% to 100% state of charge. If the driving profile allows for an overnight charge, this relatively long charging time is sufficient. However, if you need to recharge as quickly as possible between two long journeys during the day, for example, you need a higher charging power. PHEVs can generally only be charged in single-phase mode, but at a higher current than is compatible with the standard plug-in socket: most plug-in hybrid models can be charged at 3.7 kW (230 V at 16 A), which significantly reduces the charging time for the example vehicle: from 5 hours to less than 3.5 hours. However, this is only possible with a professional charging solution such as a wallbox.
Prevention of unauthorised access, full cost transparency and ease of use
In shared garages, a wallbox provides a further advantage: a wallbox with user recognition guarantees that only authorised persons are able to charge. This is rather difficult to achieve with a standard socket solution. In addition, wallboxes with the respective features are able to measure the current and record the charging data. This makes it possible, for example, to precisely quantify and bill the electricity for a company car with plug-in hybrid drive without a separate energy meter, or to determine the consumption of individual users. Last but not least, a wallbox with a fixed charging cable offers a high level of convenience: the cable and plug don't lie around on the floor and get dirty, nor do they have to be retrieved before each charging session and then stowed away again. Simply park and plug in.
Fit for the future with a wallbox
Another positive aspect of a wallbox is its versatility. Even if the PHEV can only charge with one phase and a maximum of 3.7 kW - a wallbox is usually designed for 3-phase charging with at least 11 kW (and often even 22 kW). So if you decide to buy a pure battery electric vehicle after your plug-in hybrid, you will also be able to charge that with your existing wallbox. A new charging unit in the carport or garage is then not necessary.
Good to know: All wallboxes are equally subsidised - regardless of whether a PHEV or a BEV is being purchased.
Charging at home – What’s important
Those who want to charge their cars not only at work or at public charging stations, but also at home, have to consider a number of aspects. Here are compact answers to the six most important questions, from the approval and installation of a wallbox to charging speed and electricity costs.
Load management - importance and benefits
There are still more ICE vehicles than electric cars. But what if the situation changes over the next few years? Are the power inputs, particularly of large residential buildings, de-signed to have the majority of tenants “fill their tanks” at home? The answer is yes – if the load management is sophisticated enough.
From the outside, a conventional combustion engine differs only marginally from its electric relative - internally, however, it differs a great deal. A different engine brings with it many new terms that require explanation. From 'A' as in 'AC' to 'F' as in 'FI circuit breaker' and many other terms, we have listed the most important technical vocabulary that an e-car driver should know.