Uninterruptible Power Supply UPS ONLINE USV-Systeme YUNTO Smile 400

The ONLINE USV-Systeme YUNTO Smile 400 is a Line-Interactive uninterruptible power supply (UPS) designed to protect small office and home electronics from power interruptions. With a rated capacity of 0.4 kVA (400 VA) and an output power of 240 W, this tower-style UPS provides short-term battery backup and voltage regulation for sensitive devices. The unit includes two AC outlets, a 12 V internal battery with 4.5 Ah capacity and an LCD display that shows operating status and basic diagnostics. Typical backup time is approximately 7 minutes at 50% load, allowing for safe shutdown or continued operation of essential equipment during brief outages.

Advantages

The YUNTO Smile 400 combines compact tower design with straightforward user controls and a clear LCD for real-time information. Its Line-Interactive topology provides automatic voltage regulation to handle minor sags and surges without switching to battery, which increases battery life and reduces unnecessary transfers. The included 4.5 Ah, 12 V battery delivers reliable short-duration backup for routers, modems, NAS devices, desktop PCs, and other sensitive electronics. The device is intended for easy placement in small workspaces and requires minimal setup.

Suitable for

• Protecting a home or small office desktop PC and monitor
• Backup for network equipment such as routers and modems
• Power protection for small NAS units and external hard drives
• Maintaining VoIP phones, POS terminals, or small office peripherals during short outages

Key specifications

• Topology: Line-Interactive UPS
• Apparent power: 0.4 kVA (400 VA)
• Rated output power: 240 W
• Battery type: Sealed lead-acid battery, 12 V, 4.5 Ah
• Typical backup time: ~7 minutes at 50% load
• Outlets: 2 AC outlets
• Form factor: Tower
• Display: LCD status display
• Input/Output voltage: compatible with standard mains voltages (AC)

How to use

Place the UPS on a stable, level surface near the equipment to be protected and close to a grounded mains outlet. Connect the UPS to mains power and allow the internal battery to charge fully before relying on battery backup. Plug critical devices into the provided AC outlets. Use the LCD display to monitor input voltage, battery status, and load conditions. During an outage, the unit will switch to battery power automatically; observe the remaining run time and perform an orderly shutdown of nonessential equipment if required. Replace the internal battery according to the manufacturer’s maintenance schedule or when capacity noticeably declines.

Usage recommendations

For best results, avoid operating the UPS in enclosed, unventilated spaces and keep it away from direct heat sources and moisture. Regularly test the unit under load and follow the battery replacement guidance to ensure consistent backup availability. Match connected device power draw to the UPS rated output (240 W) and avoid prolonged operation near the maximum load to preserve battery life and reduce wear.