Nextracker inks 1 GW supply bargain and claims approximately 12% bifacial yield gain

Sep 18, 2020 03:28 PM ET
  • The 1 GW 5th stage of the Mohammed container Rashid Al Maktoum Solar Park in Dubai will certainly feature NX Horizon trackers with the bargain revealed after the supplier published new bifacial return gain cases.
Nextracker inks 1 GW supply bargain and claims approximately 12% bifacial yield gain
Image: Nextracker

Californian testing organization PV Evolution Labs has collaborated with tracker manufacturer Nextracker on a white paper seeking to measure the solar power return gains used by bifacial panels mounted on single-axis trackers. PV Evolution president Jenya Meydbray has claimed: "Bifacial PV innovation stands for the single largest LCOE [levelized cost of power] renovation chance given that the introduction of trackers."

That bifacial plus single-axis trackers amounts to yield gains is not doubtful but the industry has nevertheless had a hard time to turn that understanding right into bankable yield presumptions to day. Meydbray states that stumbling block has actually stood up bigger deployment of the combination.

The CEO's assertion was borne out nearly right away, with magazine of the return gain study quickly complied with by Nextracker signing a manage engineering, procurement as well as building firm Shanghai Electric to offer more than 1 GW of its NX Horizon items for the fifth phase of the huge Mohammed container Rashid Al Maktoum Solar Park, in Dubai.

Supply bargain

The 5th stage of the ultimate 2.8 GW solar area, previously called a 900 MW piece of generation capacity, was reported yesterday as having a 1 GW scale, in a news release provided by Nextracker, which becomes part of electronics contract manufacturer Flex. The Nextracker declaration provided a completion day of 2023, which would mark finalization of the last phase of the immense project commissioned by the Dubai Electricity & Water Authority. The authority says it has plans to increase the area to 5 GW, by 2030.

" We are significantly recognized to companion with Shanghai Electric Power Generation Group to aid supply the very best performance outcomes for the Dubai Electric & Water Authority," stated Nextracker CEO Dan Shugar. "Shanghai Electric is just one of the leading high-tech companies in China, with over one a century of producing legacy, as well as we are deeply privileged to be selected for our modern technology. We anticipate discovering numerous methods to team up and partner in the future."

The white paper produced by Nextracker predicted return gains of 5-7% in reduced albedo (20%) problems, such as panels placed over yard, crushed rock or sand. The gains readily available would rise to 10-12% on a high albedo (50%) site, such as on snow or white fabric, according to the tracker business.

The supplier evaluated two-in-portrait (2P) panel alignment, with upright panels either side of the torque tube, as well as 1P sets up-- with each upright panel above television-- and also claimed the latter provided an albedo-dependent gain of 0.6-1.2%. The paper's authors associated the difference primarily to a beneficial rear-side, ground sight aspect. "The ratio of the selection elevation over grade to the selection width, or wingspan, is considerably higher for the 1P tracker than for the 2 P tracker," the white paper checks out.

The results from the Nextracker testbed in Fremont, California were compared to data from the websites made use of by PV Evolution Labs, in Davis, California, as well as by the U.S. National Renewable Energy Laboratory, in Golden, Colorado. The paper's writers specified Nextracker's testing approaches made sure the firm's results could be moderately compared with the other two websites, with variance throughout the places of 3% in high albedo problems and 1% in low albedo. "Insofar as consistency types confidence, the general agreements in between these field-measured bifacial gains-- under both low and high albedo problems, in addition to across numerous test centers as well as states-- is encouraging," specified the paper.

Nextracker contrasted bifacial gains as DC-side power yield enhancements in mono and bifacial modules. The tracker supplier made a point of comparing equal bifacial as well as monofacial modules, inasmuch as they shared the very same producer and cell technology, style and also cell stringing. The Nextracker test website, that included modules from three producers, included five rows of 1P trackers and also 4 of 2P alignments, all of which were indoor rows, to exclude any kind of outer-row exaggeration of bifaciality returns.


Modules were flash-tested on the front as well as rear sides to establish installed power rankings per installed ability and the actual bifaciality coefficient. The tools were additionally picked to achieve the most affordable string-level power mismatch to avoid losses.

Nextracker stressed the numbers were constrained to its NX Horizon tracker, as the style of that product decreases structural shading losses and also rear-side inequality loss element, compared to various other systems. The supplier said the NX Horizon supplied a framework shading variable of 12.3%, compared to 20% with a rival item. The reported mismatch loss element was 3.5% for Nextracker, versus 8.8% for the undisclosed competitor product. The NX Horizon provides 1.02-1.67% greater DC-side bifacial gains than its competitors, according to Nextracker.

The company modeled the test problems using PVsyst and located the software's predictions "reasonably good." During 3 months of high-albedo worths produced by white fabric, Nextracker determined a 12.5% bifacial gain, contrasted to the 11.2% forecasted by PVsyst. In the low-albedo setting, field dimensions recorded 5.9% gains-- more than the 5.5% prediction.

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