There’s been a major shift in American interest toward renewable energy sources, and one of the most popular is solar power. In fact, in the first half of 2014, half of all new power generation in the United States was solar energy. Since residential solar systems are becoming less expensive, an increasing number of homeowners are opting to have solar systems installed at their homes. Here are three things you need to know if you’re considering it. 1. There are tons of rebates and solar incentives. The first thing you should know is that there are a lot of incentives…