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The new intelligent wallbox sonnenHome Charger 2, expected to be available in Germany from autumn 2024, automatically integrates electric vehicles into the household's energy production and consumption and dynamically adjusts the charging behavior to solar power generation and demand. This is achieved through three charging modes: Smart, Power, and Eco.
The three charging modes
- In Smart mode, the Charger 2 selects the charging time windows to charge the vehicle with as much solar power as possible by the desired departure time. For instance, if an excess of solar power is expected during the sunny midday, the device shifts the charging process of the electric vehicle to this time
- In Power mode, the vehicle is charged as quickly as possible with the maximum available power of up to 11 kW from the home battery or the power grid
- The Eco mode, in turn, allows purely solar charging regardless of the duration of the charging process
To maximize the self-consumption of the self-generated solar power, the Charger 2 supports direct solar charging of the electric vehicle even on cloudy days. Thanks to integrated phase switching, the system automatically switches between single-phase and three-phase charging depending on the available power. Thus, the vehicle can already charge single-phase with a low charging power of 1.38 kW with PV surplus from the house roof.
Company Car Owners in Focus
The charging solution from sonnen is aimed not only at private but also at company car owners. To meet their requirements for reliable billing, the Charger 2 was developed in compliance with calibration law. Customers can, for example, charge their company cars at home and invoice the cost per kWh to their employer.
Installation and Commissioning
A separate mounting plate and a front-side installation cover offer easy and quick installation of the Charger 2. The integrated DC residual current protection further reduces installation effort. After commissioning, the device can be controlled via the sonnen app and is seamlessly integrated into the digital ecosystem of sonnen. For example, the current charging power can be checked, the charging process stopped, or the charging mode changed using the sonnen app. To protect against unauthorized use, the charging system is unlocked via the app or by RFID card.
Electric Cars as a Stabilizing Part of the Power Grid
The intelligent charging behavior of the sonnenHome Charger 2 not only optimizes the self-consumption of solar power in the household. It can also prevent overloads in the power grid that would occur if more and more electric cars were charged simultaneously. For this purpose, sonnen connects the batteries of electric vehicles in the virtual power plant sonnenVPP and controls them in a way that benefits the grid. For example, in Smart Mode, charging windows are set during times when a particularly high amount of renewable electricity is produced to smooth peak loads in the power grid. This results in additional monetary benefits for households, such as profit sharing from the VPP within the sonnenFlat electricity contract.
Customers of the Charger can also benefit financially from the upcoming reforms according to Section 14a of the Energy Industry Act. The law aims to prevent the overload of the power grid due to new installations such as electric vehicles or heat pumps. Consequently, grid-beneficial behavior of these installations is to be rewarded by the respective grid operator with approximately 150 euros per year.
Translated automatically from German.
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