The photo is sourced from huasunsolar.com
The panel is 1,755 mm x 1,038 mm x 30 mm, weighs 19.5 kg and suitable for operation at temperatures ranging from minus 40 to plus 85 degrees Celsius. The model is designed for 30-year operation, but even after that period, its capacity will not fall below 88% of the design level.
The product belongs to the category of the so-called heterojunction solar panels developed in the 1980s by SANYO, which was later acquired by Panasonic. SANYO, back in the mid-1970s, began to produce solar cells from amorphous silicon (a-Si). Today this thin-film technology is used mainly in mini calculators. It makes possible absorbing sunlight within a wide range, but it has a low energy conversion efficiency (with the coefficient not more than 13.6%). The SANYO specialists have found a way out in laminating a-Si cells using crystalline silicon wafers and a thin layer of a transparent electrode. As a result, one side of a panel provides a high light absorption efficiency, while the other provides an equally high solar energy conversion efficiency.
This technology became widespread after August 2011 when the SANYO and Panasonic patent expired. Now manufacturers are competing in the specific power of heterojunction solar panels, which can become of high demand in hot countries where high temperature resistance of batteries is important. While the temperature coefficient of conventional silicon panels ranges between 0.3% to 0.5%, Huasun’s model has the temperature coefficient of 0.26%: the performance of the panel will decrease by 0.26% when the temperature rises by one degree Celsius.