This time, it’s for any usual electrodomesticos (white goods) which carry the A+ energy efficiency rating.
So, you go along to your usual retailer, and buy a new fridge / washing machine / ac unit [whatever]. In exchange for a number of pieces of paper (padron, energy bill to prove your address, NIE) you get a 25% discount off the price of the new good (up to a maximum of 105€), removal of the old good and (usually) free delivery.
Can’t say fairer than that!
See the Agencia Andaluza de la Energia website for more info.