One more year Soltec will be present at the SNEC PV Power Expo, in Shanghai, to show its SF7 and SF7 Bifacial solar tracker. The SF7 is the most advanced 2-in-portratit configuration solar tracker on the market and counts on the highest performance and best adaptation to any terrain.
Being self-powered, it does not require any additional PV connection. The SF7 tracker has 46% less piles per MW and 15% less parts than the leading competitor, plus fewer screws connections per drive. This tracker is able to achieve up to 5% more performance than the rest of the trackers on the market. Thanks to Soltec TeamTrack™ system (backtracking) the SF7 achieves 6% more performance.
Together with this characteristics and improvements of the SF7, the bifacial version of Soltec tracker, the Bifacial SF7, achieves up to +15.7% Bifacial Gain under high albedos, while the Bifacial Gain compared to trackers in one-in-portrait is +2.1%. Soltec has a wide experience on bifacial technology. In 2015, Soltec developed the first bifacial tracker specifically created for bifacial modules for the PV plant located in the the European Southern Observatory La Silla, in Chile. This 1.72-MWp experimental photovoltaic plant set the stage for the bifacial tracking technology, turning ‘La Silla’ into a unique project that allowed Soltec to further research bifacial tracking.
With the aim to further develop bifacial trackers, Soltec inaugurated in 2018 the first bifacial solar tracking research center in the world: BiTEC. This center, commissioned in Livermore, California (USA), focuses mainly on assessing how bifacial tracker performance is conditioned by installation parameters such as frame height, shading and albedo. Bifacial results are then compared to the parameters of fixed, monofacial structures.
Over the last two years, Soltec’s testing confirmed that bifacial modules installed on SF7 Bifacial trackers yield up to 15.7% more Bifacial Gain under high albedo conditions (55.6%). Under values of medium albedo (29.5%) and low or seasonal albedo (19.9%), there is also a gain of 9.6% and 7.3%, respectively.
BiTEC also strives to study Bifacial Gain in photovoltaic modules installed according to the two most common solar tracker market configurations nowadays:
All analyses carried out at BiTEC over the last two years confirm that SF7 Bifacial Trackers in 2-in-vertical configuration obtain 2.1% more bifacial gain than trackers in 1P configuration. This data, gathered through comprehensive analysis and monitoring of bifacial trackers installed at BiTEC under all seasonal conditions, allowed Soltec to determine solar tracker performance for multiple atmospheric and terrain characteristics.
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