If you're looking for Tucson solar companies for rooftop solar panels, geothermal water heaters and more, call Custom Solar and Leisure. Despite the obstacles it faces, solar remains the country’s fastest-growing energy source, renewable or otherwise. The fact that solar is the most eco-friendly energy sources available makes it more important to continue to work for it. The closer we come to making solar America’s most widely used form of energy, the closer we will be to achieving a safe and clean future for the planet.