Solar Panel Comparison 2025

A solar system for an average single-family home (5-10 kWp) costs between €8,000 and €20,000. The exact costs depend on the system size, component quality, and local conditions. With battery storage, costs range from €15,000 to €30,000. Through government subsidies and feed-in tariffs, the system usually pays for itself after 8-12 years.

Yes, a solar system is more worthwhile than ever in 2025! Electricity prices are at record levels while system prices have fallen. With an average return of 5-10% per year and a lifespan of over 25 years, a solar system is one of the best investments for homeowners. Additionally, you benefit from government subsidies and guaranteed feed-in tariffs.

The optimal size depends on your electricity consumption. As a rule of thumb: install about 1 kWp of power per 1,000 kWh of annual consumption. For a 4-person household with 4,000 kWh consumption, a 4-6 kWp system would be optimal. With battery storage, you can increase self-consumption up to 80%. Also plan for future consumers like e-cars or heat pumps.

There are various funding programs: KfW offers low-interest loans (Program 270), many federal states and municipalities have their own grants. Since 2023, VAT has been completely waived on solar systems. Additionally, there is the guaranteed feed-in tariff for 20 years. Battery storage often has separate subsidies. Use our calculator to determine all available subsidies.

Modern solar systems have a lifespan of 25-30 years or more. Most manufacturers provide performance guarantees of 25 years, with at least 80% of the original output guaranteed after this time. Inverters may need to be replaced after 10-15 years. Maintenance costs are very low at about 1-2% of investment costs per year.