Full Feed-in
Operating model where all generated solar electricity is fed into the public grid -- with a higher tariff per kWh.
Also known as: Full Feed-in Model
What Is Full Feed-in?
With full feed-in, all electricity generated by the photovoltaic system is fed into the public grid. The system operator does not consume any solar electricity themselves and continues to purchase all household electricity from the energy supplier.
Remuneration (as of 2024)
| System Size | Full Feed-in | Surplus Feed-in |
|---|---|---|
| Up to 10 kWp | 12.9 ct/kWh | 8.1 ct/kWh |
| 10—40 kWp | 10.8 ct/kWh | 7.0 ct/kWh |
The full feed-in tariff is significantly higher than the surplus feed-in tariff.
When Is Full Feed-in Worthwhile?
- With very low self-consumption (e.g. uninhabited buildings, barns)
- With large roof areas, where a second system as a full feed-in unit is economical
- When daytime electricity consumption is low and no storage is planned
Combination Model since EEG 2023
Since 2023, two separate systems may be operated on a single roof: one for surplus feed-in (with self-consumption) and one for full feed-in. This allows the higher full feed-in tariff to be used for the portion of the system that exceeds self-consumption.
Practical Tip
For most households, surplus feed-in with self-consumption is more economical, as the savings from avoided grid purchase (~30 ct/kWh) exceed the feed-in tariff. Full feed-in can be sensible for large systems as an additional model.
Related Terms
Surplus Feed-in
Operating model where solar electricity is primarily self-consumed and only the surplus is fed into the grid.
Feed-in Tariff
Legally guaranteed remuneration for solar electricity fed into the public grid, governed by the EEG.
Self-Consumption
Share of self-generated solar electricity consumed directly in the household rather than fed into the grid.
EEG (Renewable Energy Sources Act)
German law promoting renewable energies -- governs the feed-in tariff for solar electricity, among other things.