Feed-in limitation
Feed-in limitation in the SpeicherCampus context: storage can absorb curtailed PV energy. Technically, the term is usually described as limited grid feed-in.
What does feed-in limitation mean?
A feed-in limitation caps the power a PV system may export to the public grid — as a fixed percentage of installed power or an absolute value at the point of connection. The grid operator uses it to protect the grid from midday peaks.
Without countermeasures, the energy above the cap is curtailed and lost. A storage system turns exactly these losses into usable yield: it absorbs the capped power instead of letting it expire.
What matters in practice
- take the limit value and measuring point from the grid connection contract
- quantify curtailment losses from the PV simulation (often 3-10 %)
- DC coupling uses the curtailed energy most efficiently
- EMS logic: self-consumption first, then storage, then export up to the cap
Practical example
A 150 kWp system with a 70 % cap loses a calculated 8,500 kWh per year to curtailment. The storage absorbs the midday peak and shifts it into the evening — the “lost” energy now contributes to the payback.
The SpeicherCampus perspective
For every project with feed-in limitation, SpeicherCampus calculates the curtailed energy separately — it is often the tipping point of the economics.