10 Best Ups Power Backup 2025 in the United States

The Vertiv Liebert PSI5 Lithium Ion UPS is a strong choice for anyone needing reliable power backup, especially for sensitive equipment in small to medium IT setups. With a power capacity of 3000VA/2700W, it can handle a substantial load, making it suitable for protecting servers, network devices, or workstations. Its lithium-ion battery stands out because it lasts about twice as long as traditional batteries, which means fewer replacements and lower long-term costs.

The unit offers a decent runtime—around 9 minutes at full load and up to 20 minutes at half load—giving you enough time to safely shut down your equipment during a power outage. It also recharges quickly, reaching full capacity in 3 hours or less, which is helpful if outages happen back-to-back. The UPS comes in a flexible 2U rack/tower form factor, fitting well into various setups. It provides 3 programmable outlets, allowing you to customize which devices get power priority. The sine wave output ensures clean and stable power, protecting sensitive electronics from damage.

There is a relatively small number of outlets compared to some models, which might limit how many devices you can connect. Also, at about 68.5 pounds and sizeable dimensions, it’s not the lightest or most compact option available. With a solid 5-year warranty covering the battery and equipment, this UPS is a reliable option that balances performance with long-term value.

The Vertiv Liebert GXT5 UPS offers strong power backup with a capacity of 1500VA/1350W, making it suitable for protecting medium-sized setups like servers or workstations that demand reliable, clean power. Its online double-conversion design ensures consistent sine wave output, which is best for sensitive electronics, preventing damage from power fluctuations. The unit includes four programmable outlets, allowing you to manage power usage efficiently and extend battery runtime by turning off non-essential devices during outages. It has a user-friendly color LCD with a gravity sensor that adjusts display orientation, improving interaction and monitoring.

The UPS is built in a 2U rack/tower form factor, fitting both rack-mounted environments and standalone use, which adds versatility. Being Energy Star 2.0 certified, it runs efficiently in both standard and eco modes, helping reduce electricity costs. On the downside, it uses sealed lead-acid batteries, which are heavier and may require more maintenance compared to newer battery technologies. Weighing over 57 pounds, it is quite heavy, which might be a consideration if space or mobility is important. Although the firmware update reduces fan noise, some users might still find the unit a bit loud in quieter environments. This UPS serves as a solid solution for businesses or professionals needing dependable power backup with advanced control features but is less suited for casual or very compact home setups.

The Liebert PSI5 Lithium-Ion UPS is a solid choice if you need reliable power backup for home or small office devices. It offers a strong power capacity of 1500VA and 1350W, which means it can handle multiple devices like computers, routers, and monitors without trouble. The lithium-ion battery is a plus, as it tends to last longer and be lighter than traditional lead-acid batteries. This UPS has a compact mini tower form factor, making it easier to fit in tight spaces. It delivers a pure sine wave output, which is important for protecting sensitive electronics and ensuring stable power delivery. The unit also includes surge protection, helping guard your equipment against power spikes.

With a weight of 31 pounds, it’s portable enough but not ultra-light. Its line-interactive automatic voltage regulation (AVR) helps smooth out voltage fluctuations, adding extra protection without the UPS switching to battery unnecessarily. The Liebert PSI5 is a dependable UPS with modern battery technology and solid power handling, suited for those looking for efficient, space-saving backup with good power quality.