Based on their working methods and structural characteristics, UPS can be mainly divided into several types: Standby, Line-Interactive, and Online Double-Conversion.
**Standby UPS: A Cost-Effective and Practical Choice**
The Standby UPS is the most basic type, featuring a simple structure and low cost. When mains power is normal, it directly supplies power to the load equipment; it only switches to battery power when the mains power is abnormal.
This type of UPS is suitable for scenarios with low power quality requirements, such as personal computers and office equipment. For example, the LT Series 500-1500VA Standby Lithium Battery UPS features a built-in lithium iron phosphate battery, offering over 500 cycle discharge times, which is far higher than traditional lead-acid batteries.
**Line-Interactive UPS: Balancing Performance and Price**
The Line-Interactive UPS provides some voltage regulation and stabilization even when mains power is normal, delivering higher output voltage quality than the Standby type. It maintains stable output through an Automatic Voltage Regulation (AVR) function when input voltage fluctuates. However, like the Standby UPS, it still has a switchover time.
**Online Double-Conversion UPS: The Highest Level of Power Protection**
The Online Double-Conversion UPS adopts double-conversion technology, first converting AC power to DC power and then inverting it back to pure AC power for output, effectively isolating various interference from the mains power. This type of UPS achieves zero switchover time. The Online Lithium Battery UPS series provides sine wave output and features a battery management system to ensure the battery always remains in an optimal working condition.