| Solar Potential | Global | PV modeling | Yearly | 2025 |
| Buildings | Global/Open | Structural base layer | Monthly | 2026 |
| Building Age | EU/National | Efficiency Estimation | Unknown | 2024 |
| Energy Assets | Federal | Capacity validation | Monthly | 2026 |
| Demography and Population | Federal | Census | Decade | 2025 |
| Orthophotos | State-level | Roof detection & validation | Yearly | 2026 |
| Parcels (ALKIS) | State-level | Legal boundary & ownership mapping | Yearly | 2026 |
| Business Data | Federal | Business Register Data | Unknown | 2019 |
| Purpose: This document provides a structured overview of all external data sources used in the system. | | | | |