Geothermal is better than solar because geothermal is less expensive than solar. For example solar products go up 10 years, solar cost $0.16, geothermal power plants don`t burn fuels to generate electrity. Unlike solar, photovalic are solar systems. Geothermal doesn`t have to use electronics, it’s a renewable energy source. As a result solar energy doesn’t work on a rainy day, for instance geothermal works on a rainy day. Supplement energy may be needed in low sunlight areas.