The problem with getting fusion power to work is the energy input vs output. On the sun the fusion process will happen at only a 15 million C due to the massive gravity, but on earth due to the lack of mass, you'll need to heat the hydrogen up to 100 million C for fusion to occur. That requires a lot of energy. It's not demonstrated that we can get a controlled energy positive fusion reaction on earth. Fusion energy on earth might just be a dead end.