PV Technology Solutions
Based on the advanced monocrystalline wafers and anti-LID technology, CRC Solar provides the first-year power assurance of ≥98% for PV modules.
Exceptional low radiation efficiency, low power temperature coefficient, low operating temperature, all these technological marvels lead to high energy yield for CRC Solar's solar modules.
For a bifacial PERC cell, the Al back surface field is replaced by an Al grid, hence render the majority of the rear side transparent which enables the cell to absorb light and generate electricity from both sides.
The PERC cell has a passivated rear side and a laser grooving process, which significantly augments solar cell efficiency.
Bifacial Power Generation
The energy yield of the bifacial module can be affected by the albedo effect, the height of the module, GCR and DHI, etc. The installation height of the bifacial module is recommended to be higher than 1 meter. Shading from the bracket and junction box should be circumvented. At present, the power generation of the bifacial module on fixed brackets and single-axis tracker can be simulated and tracked with the PVsyst software. Investors and engineers can determine the DC/AC ratio of the bifacial module system to minimize the LCOE.
Under high irradiation conditions, half-cell modules, especially bifacial half-cell modules, will retain a higher energy yield compared with conventional modules. The bifacial half-cell modules will achieve the lowest LCOE in geographic regions which is abundant in solar radiation.
Because of the unique parallel connection designs, half-cell modules still retain 50% power output under the circumstance of array shading in sunrise or sunset under the portrait orientation of solar modules.
In addition, half-cut technology can magnify the output of bifacial modules under a non-uniform illumination effect on the backside.
Half-cut cells possess half of the working current at any time, thereby the thermal loss is remarkably reduced. Operating temperature correspondingly decreases, and the reliability of the module is enhanced as well as the enhancement in power generation.
In infield applications, small area shadings can produce high temperatures in certain regions on the modules. This phenomenon is called the hot spot effect. The long duration of the hot spot effect could create irreversible degradation of solar modules.
Because the string current of half-cell modules is half of the full-cell modules, the hot spot temperature can be dramatically reduced. CRC Solar's experiments demonstrate that the reduction could be 10-20℃, which empowers the module durability.
Half-cut cell technology is the process of cutting the solar cells into two separate parts by a highly focusing infrared laser, hence halve the presence of a working current in the module. The thermal loss on the ribbon will be remarkably minimized and the module’s power rises by 2%. The reliability of the module is also enhanced as well as the durability.
The combination of half-cut cell technology and bifacial module can heighten the gain over the effect of current reduction.