General context and relevance of §9 EEG
Each of the following criteria must be fulfilled to be relevant according to §9 EEG "Solar peak amendment" (Solarspitzengesetz):
new PV installation in Germany and the installation date after 24.2.2025
including PV installation with peak power above 2 kW
For such systems, the operator (homeowner) must ensure that the grid feed-in is limited to 60% of the PV installation's peak power (PV module capacity), unless an SMGW + Steuerbox is installed and successfully tested for this household.
To comply with the requirements, configure both the commissioning wizard and the inverter as described below.
§9 EEG configuration instructions by inverter
For each supported inverter, open its commissioning article and follow the Country-specific configurations → Germany section.
Inverters controlled via GCP Limit
The system is limited by the inverter using the grid connection point as reference; EMS is steering all other controllable assets accordingly
Viessmann VitoCharge VX3 (coming soon)
Inverters controlled via PV Limit
The system is controlled by the EMS, which limits the inverter's PV output (DC side).
Important
For inverters that the EMS cannot control, the 60% feed-in limitation must be configured manually — directly on the inverter or via the manufacturer's configuration software. See the respective manufacturer's documentation for instructions.
The relevant models show Not Supported for Controlling HEMS in the Supported Assets list. Support is subject to change. Please check regularly for updates.
If an inverter manufacturer, series, or model is not listed at all, contact customer support.
FAQ
Can multiple inverters be combined? (BETA)
Multiple inverters that require §9 EEG can be combined only if they use the same solution type (GCP Limit or PV Limit).
Any PV Limit inverter can be combined with any other, and any GCP Limit inverter can be combined with any other. If multiple GCP Limit inverters are combined, each needs a meter at the GCP.