Materials derived for making silicon solar batteries must be pure silicon semiconductors. In pure form, also called net semiconductor the number of carriers (charged particles) is the electron and the number of carriers is the same hole.

WARRANTY POLICY
During the warranty period, if the product is experiencing a problem under warranty conditions, the company’s technician will bring the replacement lamp or new lamp to the replacement user within 24 hours depending on geographical distance. The lamp will be recovered by the company to determine the cause.
Condition is guaranteed:
• Product bugs, breakdown, technical breakdown due to manufacturer error.
• Warranty is free within 05 (five) years from the date of delivery.
• Warranty and Original Warranty stamp on the product.
• Customers do not arbitrarily disassemble, change the product structure.
The cases are not covered by the warranty:
• Product is no longer under warranty.
• Due to natural disasters such as: typhoons, fires, earthquakes … or human impact.
• Do not modify or remove any product details.
• The product is damaged due to misuse compared to the manual.
• The product shows signs of damage due to impact or electric ignition.
Services are chargeable:
• Expiration of warranty, damage caused by installation and removal during the process of moving the workshop.
• Replaces non-operating elements with original cost for 5 years after the warranty period.
Address of the product warranty lamp:
TPT TUAN PHAT TECHNOLOGY CO., LTP
Address: 129/15 Street No.2, Ward 16, Go Vap Dist., HCMC
Tel: 028-39961882-028-39961883