The phrase identifies a search query used to find online tools that estimate the viability and cost-effectiveness of photovoltaic systems. These instruments typically require users to input details such as geographic location, energy consumption, and roof orientation, then offer assessments of potential energy production, cost savings, and return on investment. For example, a homeowner interested in switching to solar power might use such a resource to determine the size of the system needed and its expected performance.
The significance of these online utilities lies in their accessibility and ability to provide preliminary estimates. This empowers individuals and businesses to evaluate the feasibility of solar energy adoption before committing to professional consultations and detailed site assessments. Historically, such calculations required expert knowledge and specialized software. The availability of free, user-friendly versions through web searches has broadened awareness and interest in renewable energy sources.