A human can not live without the sun, but the sun can be without a man. It was long ago understood by ancient peoples, so the main celebrations and celebrations were just in honor of the gods of the Sun on every continent on Earth. This paper consists of 2 main sections in which we are going to talk about the history of solar energy and how it has developed for years, main events and discoveries that inspired the solar industry. Contemporary trends will show us how far we have come to the development of solar technology and is still there space for further progress. Which countries have the best ideas for the future and whether they are sustainable. Economic impacts will be the main topic of this work and we will mostly devote it to this topic. This work deals with the effects of solar energy on the economy of the Republic of Croatia, but also on the world economy, and whether such a source of energy is financially sustainable. Which countries have the best co-ordinated solar technology and whether Croatia is a country with a clear vision of a solar infrastructure maintenance and construction plan. We will find out what are the biggest problems that hinder solar systems in development, and whether policies and interests for the common good can pull off a thicker end to the private interests of big companies.