Solar energy is for everyone simply because the sun shines in every corner of the planet. In fact, the history of solar energy can be traced back to the Greeks that were then passed on to the Romans which marked the first people to ever use the passive solar design.
As of today, solar energy is one of the best options that people have with regards to alternative power sources. This has already evolved.
Solar energy is almost maintenance free because the solar cells used will last for 25 years or more before it has to be replaced. You just have to keep the panels clean so it is able to absorb sunlight and convert that into electricity.
View this article as an introduction where we can still improve the current technologies involving solar energy.