Must Energy (Guangdong) Tech Co., Ltd., established in Shenzhen in 1998, which is a professional and rapidly growing company in Uninterrupted Power Supply (UPS), DC to AC Power Inverter and Voltage Regulators (AVR), battery industry. We specialize in online ups & offline UPS, Modified and Pure Sine Wave Power Inverters, Solar inverter, Voltage Regulators (AVR) and designed three stage Battery Chargers.Our HQ is in Shenzhen - the window city of China! We set up production bases for UPS device and maintenance free batteries separately. We are adopting advanced intelligent digital UPS power supply technology as well as most advanced AGM lead acid rechargeable battery technology, designing and producing intelligent backup style, online style UPS power supply and valve-regulated lead acid rechargeable batteries as per modernized professional standards.