VSUN's center of technology and innovation is in Japan, and our R&D lab is set up in Tokyo, with more than 15 years of solar energy business experience in R&D, manufacturing, engineering and procurement. It showcases technical advantages as the core equipment of photovoltaic power plants. Innovation is the value proposition and ideology for all VSUN people, offering the best quality and services is what makes VSUN a partner of choice in highly competitive markets.
Based requirement of project and service scope, VSUN provides customized service and improve comprehensive customer satisfaction, including customized product, solution of modules installation, packaging guideline, logistics solution and different application.
Try to improve customer satisfaction with delivery experience, VSUN provides customized, flexible, and innovative logistics solutions With the logistics partners and warehouses spreading worldwide, VSUN can support clients with solar modules logistics solution from ocean shipping, inland transportation to warehousing to meet your requirement on budget and on time.
VSUN has always adhered to the global supply chain system, selecting excellent and reliable suppliers in the local and global supply chains, strengthening the cooperative relationship with suppliers and constantly optimizing the supplier management system to deliver optimal customer experience.
Yes, solar modules still work on cloudy days but not as well as they do on sunny days. VSUN modules are more efficient to generate more power due to its cell technology with good performance on low light condition.
Black or silver frame does not affect the energy yield of the module. VSUN offers black or silver frames of modules according to the customer’s needs. Black-frame module is highly recommended for elegant full-screen rooftop with aesthetic appearance.
Customization is available by special request of customers, including the size, frame and color of the modules. Sales team will communicate with customers by providing value-added and professional solar solar solutions.
VSUN modules guarantee a product quality warranty of 12 years. Monofacial modules enjoy a 25-year warranty, while bifacial enjoys a 30-years warranty for efficient power generation.
The energy yield of double-sided power generation can be increased by up to 25%, in compared with conventional modules on special ground reflection and tracker system. It can significantly reduce the LOCE cost and increase the IRR.
When high pressure required, double-glass modules are highly recommended. However, if high-level hail test is required, single-glass modules are more suitable comparing with double-glass modules. Please contact with VSUN technical team if you have question.
There are 4 product series of VSUN modules: Vesta, Vesta N, Vesta Ultra Black and Vesta Duo. Vesta includes all-kinds of mono-facial modules, while Vesta Duo presents the bifacial modules. Vests N modules are supported with TOPCon technology which is made for scenarios of all purposes. Vesta Ultra Black is the full-black modules with black sheet and black frame.
VSUN's 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 new materials be subject to extended qualification and reliability tests before being incorporated into our products. Third-party labs like PVEL have ranked our modules among the highest quality products on the market.
Scan the barcode on the module to check the date of manufacture of the module (YY/MM/DD beginning from the 4th digit to 9th digit).
VSUN recommends that the module should be installed at a working ambient temperature of -20 ℃ ~+50 ℃ . The module's limit working ambient temperature range is from -40℃ to 85℃;
The module should be installed in an area free of shadows throughout the year. Do not install the module in a place that may be submerged by water;
When installing solar modules on a roof, a safe working area also must be left between the edge of the roof and the external edge of the solar array;
When used in areas with high wind and snow pressure, the supporting and fixing structure should be designed in strict accordance with local codes to ensure that the external load does not exceed the mechanical strength limit that the modules can withstand;
There are detailed installation instructions in VSUN's Installation manual which contains graphic descriptions for bolt or clamp installation, installation spacing, installation parts, etc. With the user manual you can compare the load requirements that works best for your installation method.
The PV modules must be installed in accordance with the installation instructions specified in VSUN's installation manual. Before installing, please read this section carefully to familiarize yourself with the complete installation processes. If you wish to use a different installation method, please consult VSUN customer service or technical support team. If in such cases that an alternative mounting method is used but not approved by VSUN, the module may get damaged and the warranty would be invalid.
The limited Warranty is transferrable when the products remain installed at the original installation location.
A. Serial number
B. Problem description
C. Photos, test data or report for defective module (we recommend providing detailed information to speed up the after-sales processing process)
D. Proof of purchase of the module
E. Module type and power
F. Contact details