10 Best Sine Wave Ups 2026 in the United States

The Liebert GXT4 UPS with a Network Card offers substantial power protection with a capacity of 6000VA/4800W, making it suitable for critical equipment that requires uninterrupted power. One of its main strengths is the on-line double-conversion technology that conditions power without relying on the battery, thereby extending the battery life. This UPS also features seamless transfer to battery power during outages, ensuring your equipment continues to run without interruption.

The included hot-swappable batteries provide up to 5 minutes of backup at full load, with the option to add extra battery cabinets for longer runtimes, which can be crucial during extended power outages. With four outlets, it has a decent number of connections for various devices. This model can be used as either a rack mount or tower, offering flexibility depending on your setup needs.

Additionally, the integrated communications card allows for remote monitoring and management, a useful feature for keeping an eye on power status through the Trellis power insight application or other platforms. However, it's important to note that this model is now obsolete, and the recommended replacement is the GXT5-6000MVRT4UXLN. For those who prefer up-to-date technology and support, considering the newer model might be beneficial. Its hefty weight and larger dimension could be a downside when considering ease of installation or space constraints. It’s a robust and reliable UPS ideal for environments where maintaining power without interruption is critical.

The Liebert GXT4 UPS 3000VA/2700W is designed for users needing reliable power protection for their electronic equipment. Its standout feature is the online double-conversion technology, ensuring continuous power even during outages, which is ideal for critical systems requiring seamless operation. With a 3000VA/2700W capacity, it can support a significant load, making it suitable for small to medium-sized business environments. The UPS provides a true sine wave output, offering superior compatibility with modern sensitive electronics.

However, the battery runtime at full load is relatively short, lasting around three minutes. This can be extended by connecting up to six additional external battery cabinets, but that could increase the cost and space requirement. The hot-swappable battery feature is a plus, allowing for maintenance without shutting down connected equipment, thus minimizing downtime.

In terms of form factor, it comes in a rack-tower convertible design, providing flexibility in installation, although its weight of 71.4 pounds and sizeable dimensions might pose placement challenges in compact spaces. This UPS is also Energy Star rated, indicating energy efficiency that helps in reducing operational costs over time. While the GXT4 is currently being replaced by a newer model, its existing features and robust performance make it a solid choice for those in need of dependable power protection. It may not suit home users or those with less demanding power requirements due to its professional-grade capabilities and size.

The Vertiv Liebert GXT5 UPS delivers 1500VA/1350W power with a pure sine wave output, making it well-suited for sensitive electronic equipment that requires clean, stable power. Its online double conversion design eliminates transfer time, ensuring seamless power protection without interruption during outages. This UPS features four programmable outlets allowing you to prioritize battery use efficiently, a handy option if you want to control which devices stay powered longer. The included color LCD with a gravity sensor helps you easily monitor system status, which is a user-friendly touch for those not familiar with UPS management.

It uses sealed lead acid batteries, which are reliable though a bit heavy, contributing to the UPS’s substantial 57-pound weight. The form factor is a 2U rack or tower design, offering flexible placement in IT racks or on a desktop. The weight and size might make installation less convenient for some users. While runtime depends on connected equipment, typical lead acid battery UPSs generally offer moderate backup time, making it best suited for short outages or graceful shutdown rather than long-term power support.

The unit's energy efficiency is improved, being Energy Star 2.0 certified, which helps reduce electricity costs. This UPS presents a strong option for small to medium server rooms or professional workstations needing consistent, high-quality power and management features, though the bulkier size and battery type may not suit casual or home users looking for lightweight solutions.