German tax incentives boost photovoltaic parks and battery storage

Photovoltaic parks and large battery storage systems are increasingly viewed as real‑asset investments. Under Germany's § 7g EStG, investors can claim an investment deduction of up to 50 % of the planned acquisition cost before the asset is purchased, creating liquidity in the capital‑intensive start‑up phase. The law also allows a special depreciation of up to 40 % in the acquisition year and the following four years, and accelerated depreciation for movable assets acquired between mid‑2025 and early 2028. These tax mechanisms shift the tax burden forward and improve cash flow, making green infrastructure financially attractive alongside its long‑term revenue from electricity sales or self‑consumption.

Sustainable investors can participate through rooftop installations, larger solar‑park projects, cooperatives or corporate‑owned systems, aligning capital with the energy transition. While the financial upside is enhanced by tax benefits, investors must still assess site conditions, shading, grid connection, maintenance costs and regulatory risks.