N/S vertical bifacial panels provide 85% of standard panels sloped mounting, Everyday Dave, YouTube - Lemmy.World

::: spoiler Gemini AI summary ### Gemini AI summary > This video, titled “Solar Panel Showdown: The Surprising Winner!”, compares the performance of various solar panel configurations throughout the year, focusing on vertical north-south facing, vertical east-west facing, and 30° south-facing panels. > > Here’s a summary of the findings: > > Winter Performance [00:15]: The vertical north-south panels significantly outperformed all other configurations. They produced 36% more energy than south-facing bifacial panels and more than double the output of standard panels. On a sunny winter day, they even reached peak power of almost 350 watts [02:54]. The east-west panels showed dismal performance due to the sun’s low angle [03:00]. Snowfall was also a factor, with vertical panels having a distinct advantage as they don’t accumulate snow, unlike standard panels which produce almost nothing until the snow melts [05:08]. The north-south panels also benefited from snow reflection, reaching up to 450 watts and even 485 watts in ideal cold, sunny conditions with snow on the ground [05:20]. > > Spring/Mid-Year Performance [06:32]: Around April, the situation changed. While days were longer, peak power was not as high due to increased temperatures. The south-facing bifacial panels became the top performers, producing over 3,000 watt-hours in a single day [06:58]. The east-west panels showed a characteristic boost in power during morning and evening [07:04]. North-south panels’ production dropped relative to the south-facing panels, producing about 61% of their output [07:11], though their absolute production remained similar to winter without snow reflection [07:25]. > > Summer Performance [07:49]: During the summer, especially with reduced sunlight due to Canadian wildfires (which caused about a 20% reduction in production) [07:57], the south-facing bifacial panels were the clear winners, producing twice the daily energy of the north-south panels [08:18]. East-west panels held their own but still couldn’t beat the south-facing bifacial panels, reaching about 75% of their output [08:43]. > > Cloudy Days [08:58]: On cloudy days, all configurations showed significantly lower production, less than a third of a sunny day [09:10]. There was very little difference in total daily production between the setups, but the south-facing bifacial panels were still the winner [09:16]. > > Year-Round Summary [09:58]: Over a 6-month period from winter to summer solstice, the south-facing bifacial panels at an optimized 30° angle were the highest overall performers. Standard panels came in at 90% of optimal, east-west panels at 80%, and north-south panels at 77% [10:05]. > > Advantage of North-South Vertical Panels [10:27]: Despite not being the highest overall producer, north-south facing vertical panels offer an advantage: their production is almost constant year-round, avoiding snow buildup in northern regions and hail damage in southern regions [11:02]. East-west panels can be added to boost summer production if needed [11:33]. > > You can find more information about solar analysis and home solar systems, along with calculators and resources, on the “Projects With Everyday Dave” website [12:08]. :::