Use our free rooftop area calculator to estimate how much space you have for solar panels. . Tesla Solar Roof is a beautiful and durable roof that generates clean energy. Tesla's power producing photovoltaic (PV) roofing Tiles are visually indistinguishable from the non-power producing metal or glass roofing Tiles, enabling homeowners the ability to harvest solar energy without aesthetic. . A typical home solar panel is about 3 feet wide by 5. 5 feet long, occupying an area of roughly 17. When looking into a system for your home, the amount of. . With solar technology becoming more efficient and affordable, it's crucial to understand how to optimize every square foot of your roof space for maximum energy collection. By considering factors like orientation, shading patterns and structural requirements you'll be able to transform your rooftop. . Enter total area of obstructions (same units) Insert recommended spacing for mounting/thermal (same units) Note: This is a first-pass estimate. Formula: Panels = (Roof Area × Usable % × (1 − Spacing Loss %)) ÷ Panel Area → Total Capacity (kW) = Panels × Panel Wattage ÷ 1000.