Context
This document provides background information and guidance on the required configuration to comply with the feed-in limitation defined in §9 EEG (2025), also known as the “solar peak amendment” (Solarspitzengesetz).
Applicability
The requirements described here apply only if all of the following criteria are met:
The PV system is a new installation in Germany
The installation date is after February 24, 2025
The system has a peak power greater than 2 kW
Regulatory Requirement
For systems that meet the above criteria, the system operator (typically the homeowner) must ensure:
The grid feed-in is statically limited to 60% of the PV system’s peak power
(based on the total PV module capacity)
Exception:
This limitation does not apply if the system is equipped with:
a Smart Meter Gateway (SMGW) and
a Steuerbox (control unit)
and both have been successfully installed and tested.
In such cases, a dynamic feed-in limitation by the grid operator is possible.
Note
If an inverter cannot be controlled by the Energy Management System (EMS):
The feed-in limitation must be configured manually
This configuration must be done directly on the inverter or via the manufacturer’s software
Please refer to the manufacturer’s installation and configuration documentation for detailed instructions
Configuration in the XENON Dashboard
Follow these steps to configure §9 EEG settings in the XENON Dashboard:
Open the relevant system in the dashboard
In the left-hand menu, navigate to: Energy Management
Go to the section: Grid Signal Processor
Click the gear icon (⚙️) to access the configuration settings
Available Configuration Options
Depending on the system setup and installation date, you can choose between the following options:
Not required
→ No feed-in limitation is needed for this systemFixed Limitation
→ A static limitation (e.g., 60%) is appliedDynamic Limitation
→ Feed-in is dynamically controlled (e.g., via grid operator signals)
Inverter Control Setting
Enable or disable this option (toggle switch) based on the inverter type:
Enable if the inverter performs the feed-in limitation itself (e.g., GCP-based control)
Disable if the limitation is handled by the Energy Management System (EMS) (e.g., PV output control)
Make sure this setting aligns with the inverter configuration described in the respective commissioning guide. Please refer to the following section for more information.
§9 EEG configuration instructions by inverter
For each supported inverter, open its commissioning article and follow the Country-specific configurations → Germany section.
For a full list of supported inverters and detailed configuration steps during commissioning, please refer to: How do I configure the 60% feed-in limitation for §9 EEG (2025)?
Control Types Overview
In general, we differentiate between two inverter control types:
Inverters Controlled via GCP Limit
In this setup, the inverter limits the system output based on the Grid Connection Point (GCP).
The inverter uses the GCP as its reference point for power limitation.
The Energy Management System (EMS) coordinates and adjusts all other controllable assets accordingly.
Inverters controlled via PV Limit
In this setup, the system is controlled directly by the Energy Management System (EMS).
The EMS limits the inverter’s PV output on the DC side.
Instead of relying on the grid connection point, the EMS actively manages the inverter’s production.