Solar costs, incentives, and savings vary significantly based on location, system size, and individual circumstances. Department of Energy, the all-in cost of a home solar panel system is between $2. 50 per watt and can increase your home's value, making it more appealing to future buyers. This article was created using automation technology. . NLR analyzes the total costs associated with installing photovoltaic (PV) systems for residential rooftop, commercial rooftop, and utility-scale ground-mount systems.