From an ecological point of view, the answer to this question is always "yes". From an economic point of view, the answer depends on the acquisition and operating costs, subsidies, local electricity prices, the local feed-in tariff and self-consumption. Photovoltaic systems combined with a high level of self-consumption often pay for themselves after 15 to 20 years. The solar calculator from Houzy calculates the amortisation period and shows you neutrally whether the investment is worth it. Of course, every case is different, so we recommend obtaining non-binding offers from different regional solar installers.