by master_heiwit | 4 Aug 2026 | Studies and research
Producing in a year an amount of energy similar to the annual consumption of a perimeter does not mean making it self-sufficient. To transform the potential of public roofs into truly used energy, hourly profiles, the grid, contracts, storage and rules of...
by master_heiwit | 4 Aug 2026 | Studies and research
The decisive step is not estimating how many panels can fit on roofs, but transforming thousands of surfaces into an orderly pipeline of financeable, permittable and constructible projects. 2027 EPBD threshold for public buildings >2,000 m² 2028 threshold >750 m² 2030 threshold >250...
by master_heiwit | 4 Aug 2026 | Studies and research
The Heiwit model yields 5.68 GWp of theoretical capacity and 7.53 TWh of annual generation. These are large-scale results, but they have not yet been independently replicated. This page presents them with correct equivalences and necessary caveats. 5.68 GWptheoretical power...
by master_heiwit | 4 Aug 2026 | Studies and research
The preliminary economic model states approximately €6.8 billion of investment. The figure is interesting, but it must not be turned into a promise of return until cash flows, price sources and sensitivity analyses are published. €6.8 bn aggregated CAPEX...
by master_heiwit | 4 Aug 2026 | Studies and research
Italy must rapidly increase photovoltaic capacity by 2030. The roofs of public buildings do not solve the problem on their own, but they can represent a significant share without occupying new land. 79.2 GW NECP 2030 photovoltaic target 37,002...
by master_heiwit | 4 Aug 2026 | Studies and research
A credible national estimate cannot be born from an average surface area multiplied by the number of properties. The Heiwit model uses a geolocated frame, a stratified sample and solar estimates referred to individual elements. Precisely for this reason the steps not yet...
by master_heiwit | 4 Aug 2026 | Studies and research
Two batteries with the same list price can end up costing twice as much as each other by the end of their lives. It's not a paradox: that's what happens when you compare the purchase price instead of the cost of the energy that...
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