The use of renewable and sustainable energies is becoming increasingly important in the modern world. Photovoltaic (PV) systems play a central role in the generation of green electricity from the power of the sun. But how can this green electricity be used efficiently?
This is where the PV surplus charging comes in, a concept made possible by combining the Spelsberg Wallbox with the Sunny Home Manager 2.0 from SMA. The combination of the intelligent Spelsberg Wallbox Smart Pro and the Sunny Home Manager 2.0 from SMA creates an efficient solution for making optimum use of self-generated PV electricity. The Sunny Home Manager 2.0 monitors the energy flows in the household in real time and controls the charging of the electric vehicle so that excess PV power is fed directly into the vehicle battery.
This technology has several advantages. Firstly, it maximises the self-consumption rate of the PV electricity generated and thus reduces dependence on mains power. Secondly, it helps to reduce the load on the power grid, as the surplus energy that would normally be fed into the grid is now used to charge the electric vehicle. Thirdly, PV surplus charging enables homeowners to enjoy environmentally friendly mobility, as they can charge their electric vehicle with green electricity without having to rely on external power sources.
Installation of the Spelsberg Wallbox is made much easier by the drilling template and mounting rail supplied. The wallbox is then securely hooked onto the rail and fixed to the wall with two screws. This saves time and ensures a professional installation.
Please note that the installation and protection of a wallbox in accordance with DIN 18015-1:2020 and DIN VDE 0100-722, among others, is of crucial importance for the safety of the electrical installation. In particular, the permissible current load capacity of the supply line according to the available power of the wallboxes and the requirements that each wallbox must be protected in a separate circuit with a residual current circuit breaker and miniature circuit breaker must be observed. The Spelsberg Wallbox has integrated DC residual current detection (>6 mA) as standard, so that an RCD type A in the sub-distribution board is sufficient in normative terms. If necessary, observe the installation regulations for surge protection devices in accordance with DIN VDE 0100-534 to protect the installation and the electric vehicle.
![[Translate to English - International:] SMA Wechselrichter](/media/_processed_/8/4/csm_csm_SMA-Home-Storage-STP-SE_635x479_555142e58b_735e3caf61.webp)
![[Translate to English - International:] Sunny Home Manager 2.0](/media/_processed_/7/3/csm_SMA-Sunny-Home-Manager-2_034244bcc3.webp)
The Sunny Home Manager 2.0 is a grid feed-in meter and must be supplied with 230V voltage for operation. Please note that current transformers must be used for measurement at the building's entry point of more than 63 A. The Sunny Home Manager 2.0 continuously communicates the PV energy generated to an SMA inverter. At the same time, it measures how much energy is being drawn from the grid at the entry point and calculates the available energy for different charging modes. Further information on installation can be found in the Sunny Home Manager 2.0 manual.
A prerequisite for communication between the Spelsberg Wallbox and the Sunny Home Manager 2.0 is integration into the same home network. The Spelsberg Wallbox can be integrated into the home network by cable via LAN or wirelessly via WLAN. There are various ways to do this. Detailed information can be found on our Service page Network integration.
The Sunny Home Manager 2.0 network connection uses a LAN cable. Any browser can then be used to access the Web UI via the IP address of the Sunny Home Manager 2.0 and log in with the existing access data.
Once integrated, the Spelsberg Wallbox Smart Pro offers various advantages as an intelligent load in the Sunny Home Manager 2.0 system:
Parameter | Setting | Explanation |
SMA SEMP interfaces | Activate | For switching the SEMP interface and the connection to the Sunny Home Manager 2.0 on or off. |
SMA charging mode | Immediate charging | The fast charging mode ensures that charging takes place at the maximum power of 11 kW, regardless of the PV generation or the settings in the Sunny Portal. This is only limited by the maximum charging power of the vehicle. |
| Surplus charging | In the case of surplus charging, the system charges primarily or exclusively with surplus solar power in accordance with the settings in the Sunny Portal. To do so, the ratio between grid and solar power per consumer can be set in the Sunny Portal. | |
| Manual configuration | During manual configuration, the Sunny Home Manager 2.0 also takes into account the wallbox values for energy demand and departure time during excess charging. | |
SMA minimum energy demand | Input in kWh | Enter the minimum energy requirement to be taken into account by the Sunny Home Manager 2.0 for charging the electric vehicle. |
SMA maximum energy demand | Input in kWh | Enter the maximum energy requirement to be taken into account by the Sunny Home Manager 2.0 for charging the electric vehicle. This value usually represents the capacity of the vehicle battery to be charged. |
| SMA planned departure time | Inputting the time | Enter the departure time to be taken into account by the Sunny Home Manager 2.0 in connection with the minimum energy requirement for the charging process. |
You can also make the following settings via the wallbox as well as the SMA Sunny Portal. These settings can be found in advanced settings, under Energy management system. To do this, navigate from the Status screen to "System".
