Quick answer: A modern residential solar panel measures roughly 66–82 inches long, 40–45 inches wide, and 1. When planning a solar energy system, understanding Valletta photovoltaic panel dimensions is like knowing the exact puzzle pieces needed to maximize roof space. Key Takeaways of Solar Panel Datasheet Specifications Solar panel datasheet specifications include factors such as power output, efficiency, voltage, current, and temperature coefficient, which determine the performance and suitability of the panel for specific applications. 6 inches thick, weighs 40–55 lb, and produces 350–460 watts. Some are ultra-efficient and compact; others are larger but deliver less per square metre. If you're tight on roof space or looking for the. Standard Residential Panels Optimize Space and Handling: The industry-standard 60-cell panel dimensions (65″ × 39″ × 1. At 40-46 pounds, they can be safely handled by.