If solar panels are installed flat, power generation decreases significantly, typically by 20% to 40% compared to angled installations, with variations depending on latitude, seasonal variations, and environmental factors, as efficiency dramatically varies due to shading, dirt. If solar panels are installed flat, power generation decreases significantly, typically by 20% to 40% compared to angled installations, with variations depending on latitude, seasonal variations, and environmental factors, as efficiency dramatically varies due to shading, dirt. If solar panels are installed flat, power generation decreases significantly, typically by 20% to 40% compared to angled installations, with variations depending on latitude, seasonal variations, and environmental factors, as efficiency dramatically varies due to shading, dirt accumulation, and. Laying solar panels flat can significantly impact power generation, 2. Effects include reduced efficiency due to angle of incidence, 3. Performance varies based on geographical location and weather conditions, 4. Flat setups often require additional technology for optimal output. In detail, the. The short answer is yes—flat solar panels can generate energy, but angling them can make a big difference.