Field help: (2024) Is there evidence of hybridisation? This text refers to the Steuererklärung 2024. You can find the version for the Steuererklärung 2025 at: (2025): Is there evidence of hybridisation? Select "yes" if you already have a confirmation of successful integration of renewable energy at your Renewable Ready installation. This certificate is required to claim the tax reduction for hybridisation.