It’s similar to a pool, or remodeled kitchen, or landscaping. If the potential homeowner doesn’t want a pool, they won’t come look at your home. If they don’t want a house with two stories, and yours has 2 stories, they won’t come look at it. If a homeowner doesn’t want a solar energy system, they won’t come look at it. But homes that sell with a solar system sell at a premium beyond the cost of the system because of the money saved.
Given the sophistication of the Internet in searching for a home to purchase. Someone who does not want solar will not search for a home with solar. Much like if they do not want a pool. If they are going to purchase your home, they definitely are going to be interested in solar. By having renewable energy source for the home, you are essentially providing free energy.