Feed-In Power

The feed-in power in photovoltaics refers to the maximum electrical power that a photovoltaic system can feed into the public power grid under optimal conditions (e.g., full sunlight). It is a crucial factor for the economic viability of such a system, as it forms the basis for calculating the feed-in tariff.

Measurement and Unit:

The feed-in power is expressed in kilowatt peak (kWp). This value indicates the maximum power that the system can deliver under standard test conditions (STC). The actual feed-in power may vary due to weather conditions, soiling of the modules, or aging of the system.

Influencing Factors:

• Module Size and Efficiency: The larger and more efficient the solar modules, the higher the potential feed-in power.
• System Size: The total power of a system is the sum of the power ratings of the individual modules.
• Location Factors: Sunlight exposure, the tilt angle of the modules, and their orientation towards the sun influence the amount of energy produced.
• Loss Factors: Cable losses, inverter losses, and other technical factors reduce the actual feed-in power.

Importance for Economic Viability:

The feed-in power is an important factor for the economic viability of a photovoltaic system. Higher feed-in power generally leads to higher returns from the feed-in tariff. However, the investment costs for a larger system are also higher.

Relevance for Energy Supply:

The feed-in power of photovoltaic systems contributes to the energy transition by feeding renewable energy into the power grid, thereby replacing fossil fuels.

Keywords: Photovoltaics, Solar System, Power Grid, Feed-in Tariff, Kilowatt Peak (kWp), Sunlight Exposure, Tilt Angle, Orientation, Energy Transition