Uninterruptible power supply Dahua Technology PFM3350-1000 Line-Interactive 1 kVA / 600 W, 2 AC outlets, 9 Ah battery

Dahua Technology PFM3350-1000 is a Line-Interactive uninterruptible power supply (UPS) delivering 1 kVA / 600 W output power with two AC outlets and a 9 Ah lead‑acid battery. The unit provides short-term backup power and voltage regulation for small servers, network equipment and workstations. Housed in a black plastic enclosure, it includes a 1.2 m power cable and meets CE compliance requirements. The UPS supports automatic voltage stabilization and a wide input range to adapt to fluctuating mains supply.

Advantages

The Line-Interactive topology offers rapid transfer to battery and active voltage regulation without the size and complexity of online systems. With a wide input range (170–280 VAC) and digital voltage stabilization, the UPS maintains stable output during undervoltage or overvoltage events. Fast charging capability reduces downtime between discharges, and built‑in protections guard against overload, short circuit, overcharging and over-discharge. The compact, quiet design fits small installations and office environments where space and noise are considerations.

Suitable for

• Small servers and rackless network appliances
• Network switches, routers and modems
• Desktop workstations and point-of-sale terminals
• Surveillance DVR/NVR systems and IP camera routers
• Home office equipment and small business critical electronics

Key specifications

• Output capacity: 1 kVA
• Continuous output power: 600 W
• AC outlets: 2
• Battery type and rating: Lead‑acid, 13.7 V 9 Ah
• Input voltage range: 170–280 VAC
• Waveform: Sine / Pure sine
• Transfer time: 4–8 ms
• Charging time: approx. 4 hours
• Protections: overload, short circuit, overcharge, over-discharge
• Color and housing: Black plastic
• Weight: 4.9 kg

How to use

Install the UPS on a stable, level surface in a ventilated area away from direct heat and moisture. Connect critical devices to the two AC outlets, then plug the UPS into a grounded mains outlet using the supplied 1.2 m cable. Allow the battery to fully charge before first use (approximately 4 hours). For normal operation leave the unit in AC mode; the UPS will automatically regulate voltage within its input range and transfer to battery during mains failure. Monitor connected load to avoid exceeding the 600 W continuous rating.

Recommendations

To maximize battery life and reliability, avoid deep discharges and perform periodic self-tests or runtime checks after installation. Keep the operating environment within manufacturer-recommended ambient temperature and humidity ranges, and replace the lead‑acid battery when backup runtime noticeably decreases or according to a regular maintenance schedule.