It depends on the value of the sample. Generally, NANJING KSUNSOLAR TECHNOLOGY CO., LTD. will send free solar panel modules sample but the freight is charged by you. We always work with the most reliable courier company to deliver samples at an affordable price. Considering the long-term relationship development, we generally send free sample to customers with our good faith.
Nanjing KSUN Solar Technology Co., Ltd. is reputable for having a strong best off grid solar panels development and production capability in the domestic market. According to the material, KSUN Solar Products's products are divided into several categories, and off grid solar panels is one of them. The quality check for KSUN Solar Products solar led lighting system is strictly carried out. It will be inspected by machines or by visual mainly in terms of board thickness, flatness, warping degree, veneer's paint film, etc. To ensure the stability and reliability of hybrid solar system, hybrid solar solutions plays an important role in the production.
For the common development of KSUN Solar Products and related industry, we are dedicated to creating high-end flexible solar panel. Inquire!