The datasheet says +25 %. Measured in the field: +8.9 %. A real gain, just not 25 %.
The full post, with its chart or video, is on LinkedIn.
Blog · Question Solar
Bifacial gain: datasheet vs field
More posts
Hot roof, fewer watts
The label says 440 W. The July roof says about 389 W. Not broken, just hot: at −0.29 %/°C, cells at 65 °C lose around 11.6 %.
Solar kWh per person
Capacity shows what is installed. Generation shows what it delivers. World average 2024: 263 kWh per person, up from 27 in 2014.
Cold morning, high voltage: Voc in winter
24 modules are fine at 25 °C, but over 1000 V near freezing. Design the string on its coldest-day open-circuit voltage.