Feed-in tariff

Feed-in tariffs are a key concept for operators of photovoltaic systems, as they provide financial compensation for the electricity they feed into the public grid. In many countries, feed-in tariffs are offered by governments or energy providers as part of incentive programs to support renewable energy. This compensation has helped promote the use of solar and other renewable energy sources and secure a sustainable energy future. This article explains everything you need to know about feed-in tariffs, how they work, and why they are an important component of solar power utilization.

What is the feed-in tariff?

The feed-in tariff is a financial incentive that allows operators of photovoltaic systems to receive compensation for the electricity they generate and feed into the public grid. The amount an operator receives for fed-in electricity is usually guaranteed for a fixed period, providing a degree of planning security. The feed-in tariff helps to cover the high initial investment costs of a solar power system and makes solar energy attractive to many individuals and businesses that cannot achieve complete self-sufficiency with solar power on their own.

How does the feed-in tariff work?

Feed-in tariffs operate on the basis of fixed rates paid per kilowatt-hour (kWh) of electricity generated and fed into the grid. The rate depends on various factors, including the size of the solar array, the year of installation, and, where applicable, regional differences. In many countries, rates are higher in the first few years after installation and decrease over time to reflect technological advancements and the falling price of solar panels.

In some countries, such as Germany, feed-in tariffs are regulated under the Renewable Energy Sources Act (EEG), and operators of photovoltaic systems can sell their solar power at a fixed price for 20 years or more. This fixed tariff provides operators with a stable source of income, which helps to shorten the amortization period for the investment in a solar power system.

The amount of the feed-in tariff

The feed-in tariff varies depending on the country, region, and applicable laws. In most countries, the tariff rate decreases annually or is adjusted for new installations in different power ranges. Generally, the earlier a solar power system is installed, the higher the feed-in tariff. This approach aims to encourage the early adoption of renewable energies and ensure the economic viability of photovoltaic systems.

The feed-in tariff can also depend on the size of the solar power system. Smaller systems, such as those frequently installed in private households, often receive a higher tariff than larger commercial systems, as the government aims to promote decentralized solar power generation. The tariff also often depends on how the electricity is used – for example, whether all the electricity is fed into the grid or whether some of it is consumed directly in the household.

How long will the feed-in tariff be paid?

In many countries, feed-in tariffs are guaranteed for a specific number of years – typically 20 years. During this time, operators of photovoltaic systems receive regular payments for the electricity they feed into the grid. This long-term guarantee provides operators with planning security and helps them to depreciate their investments in the solar system and secure a stable source of income. In some countries, such as Germany, the tariff is reduced by a fixed rate over the entire contract period, which takes into account the economic viability of new systems.

Why was the feed-in tariff introduced?

The introduction of the feed-in tariff had several objectives:

• Promotion of renewable energies: The feed-in tariff should encourage households, businesses and investors to invest in solar power systems and thus contribute to promoting the use of renewable energies.
• Reduction of CO₂ emissions: The feed-in tariff helps to reduce dependence on fossil fuels and contributes to lowering CO₂ emissions by feeding more solar energy into the electricity grid.
• Creating a market for solar energy: The feed-in tariff created the solar energy market and helped to lower the prices of solar power systems through increased production and technological progress.

Feed-in tariff and self-consumption

In many countries, operators of photovoltaic systems can not only receive compensation for the electricity fed into the grid, but also save money through self-consumption of solar power. By using the generated electricity in their own homes or businesses, operators can reduce their need for expensive grid electricity and thus lower energy costs in the long term. In some countries, self-consumption is also subsidized or supported, as it leads to a more efficient use of renewable energy sources.

What happens after the feed-in tariff expires?

After the feed-in tariff expires, the photovoltaic system typically remains functional and can continue generating electricity. Operators can then decide whether to continue feeding the remaining electricity into the grid, increase self-consumption, or even consider commercial use of the generated electricity. In many cases, operating costs decrease after the feed-in tariff expires, as the purchase costs for the solar system have already been amortized.

Conclusion: The feed-in tariff as a means of promoting solar energy

Feed-in tariffs are an important instrument for promoting the use of solar energy and accelerating the transition to a sustainable energy supply. They offer operators of photovoltaic systems an attractive way to be compensated for the solar power they feed into the grid and help to cover the high initial investments in a solar system. With the gradual reduction of feed-in tariffs and the increasing economic viability of solar power, solar energy remains an attractive option for the future – from both an ecological and an economic perspective.