What is DC UPS? 

Direct Current Uninterruptible Power Supply presents the superior method of simple parallel redundancy and direct contact between the load and the backup battery, providing emergency power to a load when the input power source (main power) fails. Besides the increased reliability, DC UPS is a Green Power solution to energy conservation and cost-cutting, as well as obvious advantages in security and operation making this the ideal choice for powering today's Smart Grid Communication equipment.