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Practical guides on electricity excise, AD-1 declarations and ADM compliance.

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Guides20 May 2026· 9 min.

Photovoltaic Excise Tax in Italy: Thresholds, Exemptions and AD-1 Filing in 2026

When does Italian electricity excise apply to photovoltaic output? 20 kW threshold, self-consumption, mixed use (art. 52 TUA), AD-1 quadri and 2026 semi-annual deadlines under D.Lgs. 43/2025.

Regional guides20 May 2026· 7 min.

Photovoltaic in South Tyrol: AD-1 Declaration and Excise for Bolzano-Bozen Operators

South Tyrol falls under Italy's electricity excise regime — AD-1 is filed with national ADM in Rome. Exemption thresholds, German-language support and 2026 deadlines for photovoltaic operators in Bolzano province.