There is not a yes or no answer to whether or not solar will increase a homes value. it depends on a lot of things including the area in which the home is located, where the panels are placed on the home and how much energy you will save. For example a home in California may receive far more value than a home in Massachusetts. Putting solar panels in the front of your home could make it ten times harder to sell because it will look ugly as hell.
There are quite a few considerations to think about when it comes to solar power. Take a look at the comprehensive resource for more information.