
Every refurbished power system is cleaned, inspected, programmed, and electrically tested before shipment.
Warranty coverage and knowledgeable technical support help protect your investment.
Our experienced team helps customers select, deploy, and support critical power solutions.




The Liebert GXT4 is primarily a refined GXT3 rather than a complete redesign. Liebert retained the proven core power architecture and added a better LCD interface, reflecting confidence in the underlying electronics. That continuity also creates practical compatibility: GXT3 battery packs and many extended-runtime modules and backplates can be used with the GXT4, often providing an affordable path to longer runtime or replacement accessories.
GreenLight considers the family a solid value for customers who want compact online protection from a mature design without paying for unnecessary novelty. Buyers should still verify the exact electrical configuration, especially on 5-10 kVA models, because many are split-phase units and may not match a site's voltage requirements. When the voltage and accessories are confirmed, the GXT4 offers good performance, a more approachable local display, and the service advantages of a platform closely related to the established GXT3.
GreenLightUPS offers turnkey installation services for many of our products throughout the country. Message us for help planning delivery, assembly, connection, and installation of your UPS.
Call the UPS experts—it's not just a line; it's who we are. With decades of experience in UPS sales, repair, design, and installation, we can help craft a solution that fits your needs and budget.
Extend your peace of mind with our Always GreenLight service plans and extended warranties. Options range from hands-on support to virtual monitoring and can include coverage for equipment and parts.
GreenLightUPS offers UPS systems ranging from compact 1 kVA units to large data center systems up to 500 kVA. We sell new and refurbished systems from APC, Eaton, Toshiba, Schneider, Liebert, Vertiv, and AEC.
Since most UPS systems are heavy, we ship most orders on pallets via freight carrier to your loading dock. Smaller systems under 70 lb may ship by FedEx or UPS. Contact us for special delivery requirements or shipments outside the continental U.S.
Each UPS or system is retested before shipping to help ensure a smooth experience upon receipt. Most orders require 2–3 business days for preparation and testing. Contact us if you have special requirements or need expedited handling.
Need your UPS now? Message us about units ready to ship today and expedited shipping options. We offer FirstLightUPS Air Cargo and UPS Express services. Getting what you need starts with a call—we're here to help.
South Florida customers can pick up orders from our Deerfield Beach facility. Place your order and message us with your phone number; we can text you an ETA and pickup details.
Unless otherwise specified, GreenLightUPS warrants equipment for 12 months from the date of purchase. Warranty claims require the end user to participate in diagnosis and troubleshooting with our technical team before resolution. Batteries are excluded from this Limited Warranty unless specifically identified as covered in writing at the time of sale.

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