Questione giuridica chiave
Whether the solar battery for the chalet is deductible as maintenance or energy-saving expenditure.
Decisione estratta
No. The battery is not building maintenance and is not shown to be a qualifying energy-saving or environmental measure; it mainly improves living comfort and usability.
Motivazione estratta
Energy-storage devices are not mentioned in the applicable rules; they are useful for using solar power but do not themselves directly save energy. The taxpayer did not prove an energy-saving effect, and the battery increased the property's utility and value.