UPS EVER Ever Duo 850 PL T/DAVRTO-000K85/01 850VA Line-Interactive, 550W, AVR, 3 AC outlets, 12V 2×5Ah, Tower

Line-interactive UPS EVER Ever Duo 850 PL provides 0.85 kVA (850 VA) capacity and 550 W output power to protect computers and other electronic equipment from voltage fluctuations and short power interruptions. The unit includes Automatic Voltage Regulation (AVR) to stabilise incoming voltage in the range 162–290 V and maintain an output between 191–253 V. The tower-design UPS has three AC outlets, cold-start capability and uses two 12 V batteries (5 Ah each). Operating temperature range is 0–40 °C.

Advantages

The Ever Duo 850 PL combines line-interactive topology with AVR to reduce the frequency of battery use during brownouts and overvoltages, extending battery life. Its compact tower form and three AC outlets make it suitable for small office or home setups. Cold-start support allows the UPS to power connected devices from battery when mains power is absent.

Suitable for

• Desktop PCs and workstations
• Home office equipment (routers, modems, VoIP phones)
• Small network devices and peripherals

Key specifications

• Capacity: 0.85 kVA (850 VA)
• Output power: 550 W
• Topology: Line-Interactive
• Automatic Voltage Regulation (AVR): Yes
• Input voltage range: 162–290 V
• Output voltage range: 191–253 V
• Frequency: 50/60 Hz
• Batteries: 2 × 12 V, 5 Ah
• Cold-start: Supported
• AC outlets: 3
• Form factor: Tower
• Operating temperature: 0–40 °C
• Colour: Black
• Weight: 6.9 kg
• Dimensions (H×W×D): 189 × 100 × 325 mm

How to use

Install the UPS on a stable, level surface in a well-ventilated area. Connect the UPS to mains supply and allow the internal batteries to charge before relying on battery backup. Plug critical devices into the provided AC outlets. When mains power fails, the UPS will switch to battery power automatically; monitor load to avoid exceeding the 550 W output rating. Use the cold-start function to power devices from battery if mains power is not available.

Recommendations

For reliable protection, reserve the UPS for essential devices only, keep total connected load below the rated 550 W, and perform periodic battery checks. Replace batteries according to manufacturer guidance or when runtime noticeably decreases.