There are three primary types of UPS systems, each designed to meet different power needs and application environments: Jinnuoglobal.com

1. **Standby UPS**: This is the most basic type of UPS, commonly used for home and small office applications. It switches to battery power during an outage, typically within a few milliseconds.

2. **Line-Interactive UPS**: This type of UPS is ideal for environments that experience frequent voltage fluctuations. It can automatically adjust voltage levels using a built-in voltage regulator, providing stable power to connected devices while maintaining efficiency. 

Uninterruptible Power Supply (UPS)
APC Back UPS
APC EASY UPS
APC Modular UPS
APC Smart SMC UPS
APC Smart SMT UPS
APC Smart SURT UPS
APC SPM UPS

3. **Online UPS**: The most advanced option, online UPS systems continuously convert incoming AC power to DC and back to AC. This provides the highest level of power quality and is suitable for critical applications requiring constant power, such as data centers and medical facilities.