The FAQs provide quick assistance and information for the most frequently asked questions. They are not intended to replace the user documentation for any specific product.
Only a 6 mA DC contactor is available in the EV charging box. An additional 30 mA type A residual current circuit breaker must be provided in the domestic installation.
No, the 30 mA type A residual current circuit breaker must be provided in the domestic installation.
Vehicles that work with type 2 charging plugs can be charged on all AC SMART EV charging boxes.
Yes, but multiple users can only be managed with EV charging boxes from the AC SMART VALUE and ADVANCED product lines.
The required hardware is only installed in the AC SMART ADVANCED product line. Once ISO 15118 is published, Weidmüller will provide a software update promptly.
Yes, EV charging boxes with permanently attached cables are available in different cable lengths.
You can view information on the current charging process in the AC SMART app or the web server.
Yes, our AC SMART VALUE and AC SMART ADVANCED are eligible for KfW subsidy 442.
Further information can be found on our page PV surplus charging.
All charging cables with a type 2 plug can be used.
PV surplus charging can be realised with our AC SMART VALUE and ADVANCED through direct communication with the inverter or by installing an additional energy meter.
Further questions and more detailed answers on the subject of PV surplus charging can be found here.
The two relays make PV overflow charging possible by switching phases alternately on and off.
Yes, the max. charging current can be limited. The maximum limit for the charging current is set by the electrical installer upon commissioning. The maximum charging current can be adjusted up to this maximum limit later on in operation in the web server or in the AC SMART app.
The integrated counter has an accuracy of 4 %.
PV overflow charging is possible with EV charging boxes from the AC SMART VALUE and AC SMART ADVANCED product lines.
With load management, up to 16 boxes can be controlled via an AC SMART ADVANCED control box; load management with up to 50 charging points can be implemented with our load management system SMARTcharge.
Static load management
In static load management, the total current can be defined for up to 16 networked charging points. The maximum total current is determined based on the available connected power of the domestic installation or sub-distribution, minus the maximum power required by all other devices in the same distribution circuit. The defined total current is set in the control box and distributed there evenly to all active charging points in the charging network. Whenever a vehicle in the network is registered or deregistered for charging, the distribution of the total current is adjusted accordingly.
Static load management is possible with AC SMART EV charging boxes from the VALUE and ADVANCED product lines.
Dynamic load management
In dynamic load management, the energy meter continuously monitors the total current which the EV charging boxes and other electrical devices in the building require and continuously calculates the total current that is available for charging. The power measurement integrated in every EV charging box records the vehicle-specific charging current and reports this to the control box, which distributes the available total current accordingly. The total current is distributed across all active charging points: when the other electrical devices require less energy, there is more current available for charging. When the other electrical devices require more power, the charging current is reduced.
Dynamic load management is possible with AC SMART EV charging boxes from the ADVANCED product line as the control box and VALUE or ADVANCED product lines as the satellite box.
PV surplus charging is the use of surplus, self-generated electricity from a photovoltaic system (e.g. on the roof of a detached house) to charge an electric car. PV surplus charging can be realised through communication between the inverter and the charging box or by installing a energy meter. Find out here how to realise PV surplus charging with the Weidmüller charging box AC SMART.
For PV surplus charging with an additional energy meter, you need a Modbus RTU energy meter. In our product portfolio you will find the following energy meters that you can use for this application:
The advantage here is that this method has no interfaces to other systems and therefore always works.
After your AC SMART has been installed according to the installation instructions (Weidmüller online catalogue under Downloads), you can start with the connection of the additional energy meter and the settings in the web server of your AC SMART. You will find the necessary steps on this page.
The term peak loads refers to short-term and greatly increased demand for power from the electricity grid, which can occur, for example, when several electric cars are charging at the same time.
As load peaks can jeopardise the stability of the electricity grid, the highest annual load peak is used as the basis for calculating the electricity tariff for industrial companies. This is retroactively added to a company's total annual electricity consumption, which leads to significantly higher electricity costs.
Such load peaks can be avoided by static or dynamic load management, either by defining a static upper limit for the released charging current or by dynamically calculating the amount of electricity available, taking into account the house connection and all other consumers.
An unbalanced load is the uneven loading of a single phase (L1, L2, L3) of the three-phase power grid. This can be caused, for example, by the single-phase charging of electric cars, especially plug-in hybrids.
Possible consequences of unbalanced loads are the destruction of individual loads or damage to the generator. For this reason, unbalanced load limits were introduced. In Germany, for example, this is 20 A.
To prevent unbalanced loads, we recommend wiring the individual charging points of a charging park in rotation (charging point 1: L1, L2, L3; charging point 2: L2, L3, L1; etc.). However, this cannot rule out unbalanced loads. Therefore, a load management system must be installed that takes into account not only the maximum amount of electricity available but also the applicable unbalanced load limit.
The Weidmüller charging box AC SMART can be connected to all inverters via Modbus TCP to enable PV surplus charging with an inverter. Some of them are listed in our web server dropdown menu.
More detailed instructions for connecting your inverter and the necessary steps can be found here.
Up to 16 RFID tags can be registered for each EV charging box.
You can access the last 4000 charging processes in every EV charging box.
When an EV charging box is installed, the electrical installer sets up the EV charging box using the integrated web server. The operator can change the settings individually later on. Access details for the web server are provided in the operating manual.
A drilling template is included with every delivery of an AC SMART EV charging box.
There is an installation video in German and English on YouTube and in our product catalogue in the download area for the item in question.
The web server can be used to update the firmware in any EV charging box. The update function is available in the web server under Config/General.
After you have successfully coupled your EV charging box with the app, you will be automatically sent to network setup to connect the EV charging box to an available network.
If you have selected “WLAN”, a list of available WLAN networks will be shown on the next page.
If you have selected “LAN”, you will be asked to connect your EV charging box with an Ethernet cable.
Select the home view in the AC SMART app. All EV charging boxes coupled with the app will be shown.
Note: If multiple EV charging boxes are coupled with your app, you can swipe left or right to switch between the previews for the coupled EV charging boxes.
The residual current circuit breaker is in the fuse box for your domestic installation. To be safe, it is best to ask your installer which residual current circuit breaker the EV charging box was connected to.
Ensure that you are activating the residual current circuit breaker that is connected to the EV charging box.
The next time you switch it on, the EV charging box will start flashing blue right away (within 1 to 2 seconds).
If coupling mode does not start after multiple attempts, you can manually start coupling mode in the web server of the EV charging box under Network/General.
Ensure that your laptop is connected to the EV charging box via a network cable.
If the EV charging box is already connected with a LAN/WLAN and is in the same network as the laptop, no further manual settings are required. In this case, the IP address of the EV charging box will be shared by the router.
Otherwise, manually set the IP address of your laptop to a value between 192.168.0.2 and 192.168.0.254 (exception: 192.168.0.8).
Please remember to change your network address once you have completed the settings in the web server.
