The energy transition continues to gain momentum – and with it, the demands on our electricity grid are also increasing. The dynamic expansion of photovoltaic systems and the growing proportion of electrical consumers such as heat pumps and wall boxes require targeted control and coordination. In order to ensure grid stability under these conditions, the legislator has created new framework conditions with the so-called Solar Peak Act. These have been in force since February 25, 2025 and relate in particular to Section 9 EEG and Section 14a EnWG.
Feed-in management in accordance with Section 9 EEG and controllable consumption devices in accordance with Section 14a EnWG
Clear requirements now apply to newly installed photovoltaic systems with an output of less than 25 kW: Operators must limit the feed-in power to 60% of the installed module output. The limitation is lifted when control capability is established by installing an iMSys in combination with a HEMS. The aim is to avoid feed-in peaks that put a strain on the grid. Modern home energy management systems (HEMS) such as the beegy energy manager offer an intelligent solution here to maximize self-consumption and at the same time act in a grid-friendly manner.
The new version of Section 14a EnWG gives grid operators the option of temporarily accessing controllable consumption devices such as wallboxes, heat pumps or battery storage systems in exceptional situations. The power consumption is temporarily reduced to around 4.2 kW per device (or around 7.5 kW with two devices). This measure is gentle on the grid and still ensures normal everyday operation.
Technical requirements and smart solutions for installers and end customers
The new legal regulations have a direct impact on the planning, installation and operation of PV systems. Systems since 01.01.2024 must be controllable in accordance with Section 14a EnWG and be able to communicate with a smart meter gateway or the CLS control box. For installers, this means greater technical complexity and new requirements for the system architecture.
This is where the beegy HEMS comes in: A manufacturer-open and powerful home energy management system which, in contrast to classic direct control, which works rigidly and without taking PV generation into account, the beegy HEMS enables flexible power control. This means that local PV generation is also taken into account when controlling the appliances – without any additional relays or external control components. This not only reduces technical complexity, but also installation costs.
The integration of the beegy HEMS in accordance with §14a EnWG thus guarantees legally compliant and efficient implementation. Grid stability, full control and maximum convenience are maintained – for installers and end customers alike.