Why does the Solar Wind consist of charged particles? The Wikipedia article on Solar Wind gives the following explanation:


  The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona. This plasma mostly consists of electrons, protons and alpha particles with kinetic energy between 0.5 and 10 keV.


If the solar wind consists of both electrons and protons, why don't they combine and give Hydrogen or any other elements? Then, why would Solar Wind be charged? Is that because of the high kinetic energy of the ejected particles? If yes, let us consider a proton and an electon. They must be of almost the same energy if so there will be no relative kinetic energy, so I think they must combine in the same way as if they were at rest or in motion at small velocities.
You are right about the kinetic energy (ie the fast motion) of the particles being the reason, but wrong when you say


  They must be of almost the same energy if so there will be no relative kinetic energy,


The individual particles are moving fast, but there is huge variation between them in just how fast and in what direction. In other words, the solar wind is very hot. The extent of disorderly motion in a gas is measured by its temperature.  The wikipedia article you link gives temperatures of 100 000 to 800 000 Kelvins. So if an electron and proton did happen to collide gently enough to form an atom of hydrogen, another particle would probably smash into them before very long and knock the electron off again.

You might think they are all moving away from the Sun, but you have to allow for the effects of magnetic fields. Charged particles moving in a magnetic field curve around in all sorts of ways, and, additionally, moving charged particles create a magnetic field which affects other particles. So  the movement is extremely turbulent.