With solar balconies, no such consent is required unless the facade is listed as of historic interest or there is a specific prohibition from the residents’ association or the local authority. Furthermore, as long as the installation does not exceed 800 watts it doesn’t require certification, which can cost from €100 to €400, depending on the area.
“The beauty of the solar balconies is they are flexible, cheap and plug straight into the domestic network via a converter, so you don’t have to pay for the installation,” says Santiago Vernetta, CEO of Tornasol Energy, one of Spain’s main suppliers.
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This looks like an obvious solution. You don't need a system huge enough to run your house. You need one that is cheap and easy, and will save you $.
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