Because of the issue of light leakage in the gaps between the solar cells in double-glass modules, Apex Solar generally uses glazed semi-tempered glass for the backside panel of the double-glass module, with a glazed layer formed into grids where the cells are placed. Because the requirement for accuracy and shading of the glazed layer on the back panel of the cell should be reduced, a certain amount of light leakage is allowed in the industry, without any effect on the quality and energy yield of the product. The inconsistency in light transmittance on the back panel of the single-glass module is caused by differences in light transmittance caused by variations in each model of the back panel of the module. However, when the quality of the back panel meets the certification criteria, there will be no effect on energy yield. Agents will preferentially load the same batch of modules and ship them to the downstream customers.

Customized module are available to meet the special demands of customers, and are in compliance with the relevant industrial standards and test conditions. During the sales process, our salespersons will inform customers of the basic information of the ordered modules, including mode of installation, conditions of use, and the difference between conventional and customized modules. Similarly, agents will also inform their downstream customers of the details about the customized modules.

We offer black or silver frames of modules to meet customers’ requests and the application of the modules. We recommend attractive black-frame modules for rooftops and building curtain walls. Neither black nor silver frames affect the energy yield of the module.

Various abnormal conditions may be found throughout the life cycle of modules, including those arising from manufacture, transportation, installation, O&M and use. However, such abnormal conditions can be controlled effectively as long as Grade A products of LERRI are purchased from official suppliers and products are installed, operated and maintained according to the instructions provided by LERRI, so that any adverse effect on the reliability and energy yield of PV power plant can be prevented.

Perforation and welding are not recommended as they may damage the overall structure of the module, to further result in a degradation in mechanical loading capacity during the subsequent services, which may lead to invisible cracks in modules and therefore affect the energy yield.

The energy yield of module depends on three factors: solar radiation (H–peak hours), module nameplate power rating (watts) and system efficiency of system (Pr) (generally taken at about 80%), where the overall energy yield is the product of these three factors; energy yield = H x W x Pr. The installed capacity is caculated by multiplying the nameplate power rating of a single module by the total number of modules in the system. For example, for 10 285 W modules installed, the installed capacity is 285 x 10 = 2,850 W.

Energy yield improvement achieved by bifacial PV modules compared to conventional modules depends on ground reflectance, or albedo; the height and azimuth of the tracker or other racking installed; and the ratio of direct light to scattered light in the region (blue or gray days). Given these factors, the amount of improvement should be assessed based on the actual conditions of the PV power plant. Bifacial energy yield improvements range from 5–20%.

Any distributed modules marketed by us will be accompanied by certificates of conformity, inspection reports and shipping marks. Please ask truck drivers to provide certificates of conformity if no such certificates are found in the packing case. The downstream customers, who have not been provided with such documents, should contact their distribution partners.

Scan the barcode on the module to check the date of manufacture of the module (MM/DD beginning from the 10th digit).

APEX modules have a general warranty of 12 years. Monofacial modules have a 25-year warranty for efficient power generation, while bifacial module performance is guaranteed for 30 years.

APEX, as the world’s leading solar module technology company, has been deeply involved in the residential market for many years and has a strong solutions team. APEX can provide customers with professional project survey, system design, financial advice, power plant construction and acceptance standards, and power plant monitoring operation and maintenance services for the entire life cycle of the project.

APEX took the lead in working with domestic and foreign institutions and customers to carry out empirical testing of bifacial modules for PV power plants, systematically studying the power generation mechanisms of bifacial modules. APEX also leads the industry in bifacial module shipments, surpassing 20 GW+, while providing customers with reference data and technical support.

APEX’s intelligent production network can guarantee the traceability of each module, and our highly automated production lines feature end-to-end inspection and analysis processes to ensure that each module meets the highest quality standards. We select module materials according to the highest standards, with the requirement that all new materials be subject to extended qualification and reliability tests before being incorporated into our products. Third-party labs like RETC and PVEL have ranked our modules among the highest quality products on the market.

APEX has the largest module production capacity in the industry, with more than 50 GW in its integrated capacity network, fully guaranteeing the supply of modules. In addition, the production network facilitates the global distribution of modules with the help of land transportation, railway transportation and sea transportation.

Bifacial modules are slightly more expensive than monofacial modules, but can generate more power under the right conditions. When the rear side of the module is not blocked, the light received by the rear side of the bifacial module can significantly improve energy yield. In addition, the glass-glass encapsulation structure of the bifacial module has better resistance to environmental erosion by water vapor, salt-air fog, etc. Monofacial modules are more suitable for installations in mountainous regions and distributed generation rooftop applications.