Want to make use of unused roof space and increase your yield? When expanding an existing PV system, EEG thresholds and tax status are key factors. The 2026 Commercial Guide.

Should you buy an existing plant or build a new one? It’s no longer possible to have both a high feed-in tariff and a long remaining term at the same time. The 2026 Investor Comparison, featuring a present value table, key considerations, and the current EEG rates.

Photovoltaic contracting shifts the investment in and operation of a solar system to a service provider—you simply purchase the electricity generated by your own roof for 8 to 14 cents per kilowatt-hour instead of 16.7 cents. A comparison of four models and when an upfront investment is still worthwhile.

In 2026, approximately 66,000 PV systems will no longer be eligible for EEG subsidies. What to do after 20 years? Feed-in tariffs, self-consumption, repowering, or decommissioning—including costs, legal frameworks, and the current rates effective August 2026.

Over 90% of industrial roofs in Germany lie idle—yet they hold more than 33 GW of untapped solar potential. This guide explains the actual costs and benefits of a PV system on your industrial roof, as well as the regulatory considerations for 2026.

How much will a solar power system cost in 2026? This cost overview provides system prices by system type, battery storage costs, subsidies (IAB, KfW 270), and realistic payback periods—so your calculations are based on reliable figures.

What return will a commercial solar system generate in 2026? Three detailed scenarios—generation, storage, and open-space installations—show the IRR, payback period, and the true driver of returns: self-consumption.