Some of our smaller capacity uninterruptible power supplies for less expensive 3D printers, computers, and electronics don’t have LCD screens. That is intentional.
We started off with LCD screens on every uninterruptible power supply (UPS), but market research concluded that for UPS systems under a certain price point, our market would rather have longer run times on battery power and better internal components for reliability and longevity than having an LCD screen for periodic monitoring on the front. The LCD also reduced the battery run time on smaller uninterruptible power supplies due to its small, but verifiable additional power consumption.
Our high end online (double conversion) uninterruptible power supply (UPS) systems have LCD screens for advanced monitoring and operation customization.