lu, compare quotes from verified experts and receive up to 3 proposals within 24 hours. Specify your renewable energy needs and your location in Luxembourg. . Luxembourg's new subsidy scheme for solar installed on residential buildings by an approved installer deducts the financial aid from the installer's invoice, meaning customers no longer have to wait for reimbursement. These schemes are heavily subsidised by the State, local authorities and energy. . Households or co-owners installing solar panels will no longer have to pay the full cost, with the new pre-financing model. The aim is to make efforts to protect the climate a profitable investment.