The Sun produces energy by the nuclear fusion of hydrogen into helium in its core.since there is a huge amount of hydrogen in the core, these atoms stick together and fuse into a helium atom. This energy is then radiated out from the core and moves across the solar system. It is not enough to just answer the question, so here is a breakdown of how the energy is transferred from the core to the Earth and the other objects in our solar system.

1. It is much larger than the Earth

2. It uses one of the most Energy producing processes known: Nuclear Fusion

3. The energy it produces is contained by its gravity and only escapes through radiation and an occasional solar flare.

It has a pellet stove in its center. Didn't you go to school? Hydrogen Fusion.

Really good batteries.

Because that's how God made it