Where can I find information on EEG system codes?
First of all, a distinction must be made between the BNetzA system number and the EEG system code. The system number is assigned by the BNetzA when the EEG system is registered. This is mandatory for new installations that are commissioned after 01.08.2014.
The EEG system code is assigned by the grid operator responsible for acceptance and remuneration (avNB). Further information on this, including the coding method, can be found in the section Implementation aids for the EEG directly on the grid transparency page (Implementation aid for grid operators) or in the BDEW implementation aid for the EEG under the heading Energy > Implementation aids EEG / KWK-G.
Furthermore, we would like to refer to the legal regulations according to § 61 EEG and §74 EEG on the subject of self-supply, which may need to be taken into account.
Is it possible to determine the system type (e.g. ground-mounted PV system) based on the data published by the TSOs?
Using the data published by the transmission system operators (TSOs), it is possible to find out the type of system (e.g. ground-mounted PV). This can be done using the transaction data published on the websites of the individual TSOs as part of the EEG annual statements. This shows the remuneration category, the quantity and the remuneration for each system key, which you can also find in the system master data. You can use the remuneration category to filter out the type of installation (e.g. positions 1-2 of the remuneration category key: So = ground-mounted solar energy installations).
An explanation of the remuneration category codes can be found in the EEG remuneration category table published on this page under the heading Processing instructions and implementation aids. In this file, the remuneration category codes are explained in the "Explanations" sheet (e.g. line 159/218/285 for solar open space).