The move by the company will also reduce grid strain and enable smarter energy distribution.
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.
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 optimise and expand compatibility, particularly for multi-asset homes and more complex setups.
gridX also covers the price optimisation for time of use tariffs in combination with §9 EEG-compliant optimization. This allows end customers to simultaneously maximise the use of their locally-generated solar power and minimise their bills by optimising 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.
“The successful rollout of §9 EEG-compliance showcases how smart energy management makes the energy transition feasible at scale” said 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 incentivise end users to become active participants in the clean energy transition.”
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