Munich, July 22, 2025 — gridX, Europe’s leading energy management system provider, has successfully implemented Paragraph 9 of the Renewable Energy Act (EEG) for its customer base. This milestone positions gridX as one of the first companies to offer fully compliant and technically integrated solutions. The changes mark a crucial step in optimizing self-consumption and dynamic energy tariffs in German households, while reducing grid strain and enabling smarter energy distribution to meet the country’s climate goals.
Paragraph 9 EEG mandates smart feed-in limitations in two phases
Paragraph 9 EEG, introduced under the Solarspitzengesetz 2025 (Solar Peak Act), imposes new technical requirements for renewable energy systems installed after February 25, 2025. The regulation mandates that new photovoltaic (PV), combined heat and power (CHP), and wind systems with a capacity above 2 kW must include smart metering (iMSys) and remote control capabilities. These requirements ensure real-time monitoring and controllability, critical for maintaining grid stability amid rising shares of renewable energy.
As a first step, the regulation mandates the fixed feed-in limitation to 60 percent of peak power for systems between two and 100 kilowatts without smart metering systems. gridX has already successfully implemented this feature. In the future, homes with smart meter infrastructure (now mandatory for newly installed systems with a capacity of more than two kilowatts or controllable consumption of more than 4.2 kilowatts) must be able to dynamically limit feed-in to the power grid, the next product feature to be rolled out by gridX. This feature mirrors compliance to Paragraph 14a EnWG in that feed-in must now also be dynamically controlled, in addition to grid off-take.
Ensuring compliance without compromising comfort
gridX has not only adopted the necessary software components according to the connected hardware’s capabilities (e.g. hybrid inverters), but has also developed a streamlined configuration process to reduce complexity for energy providers and installers. Customers with §9 EEG-relevant systems can now automatically apply a 60 percent feed-in limitation during the configuration of an inverter via a guided commissioning wizard. The intelligent energy management system (EMS) platform, XENON, can be used to set eligibility, control level and inverter-specific parameters. The system supports inverter models from SolaX, KOSTAL, Sungrow, FoxESS, Fronius, GoodWe, Solplanet, Viessmann, SolardEdge and Enphase, with many other inverter manufacturers in the pipeline. gridX is working closely with OEMs and testing partners to optimize and expand compatibility, particularly for multi-asset homes and more complex setups.
gridX also covers the price optimization for time of use tariffs in combination with §9 EEG-compliant optimization. This allows end customers to simultaneously maximize the use of their locally-generated solar power and minimize their bills by optimizing energy flows according to fluctuating prices, while also meeting regulatory requirements that support grid stability. Such simultaneous benefits are only possible with a locally-installed gateway that seamlessly connects energy devices, grid operator signals and price signals in a single system.
Rolling out new regulation at scale with smart energy management
"The successful rollout of §9 EEG-compliance showcases how smart energy management makes the energy transition feasible at scale," says Carsten Schäfer, Senior Product Manager Platform at gridX. "New regulatory requirements such as §9 EEG can initially cause confusion and complexity in the energy industry. But due to our adaptable technology, team of industry experts and strong network of ecosystem partners, gridX was able to react quickly to such changes and efficiently scale compliant solutions. By integrating remote control, smart metering and dynamic feed-in management, we’re able to reduce complexity and incentivize end users to become active participants in the clean energy transition.”
gridX is Europe's leading smart energy company based in Aachen and Munich. With its modular EMS XENON, gridX enables manufacturer-independent optimization and management of distributed energy resources. With XENON, partners can build, scale and adapt energy management solutions faster and more efficiently than ever before, always meeting evolving market demands. E-mobility partners can install more and higher power charge points at sites without the need for costly grid extensions. Partners in home energy management minimize costs and complexity by offering end customers holistic smart energy management built for the future.
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