GF400 Offline UPS 400VA 240W Standby Power Supply for PC & POS

Reliable 400VA Offline UPS for PC, Router and Network Devices

The GF400 is ulinkeep’s desktop standby 400VA offline UPS for home offices, small businesses and network cabinets. Rated 400VA / 240W with a modified sine wave output, it keeps a desktop PC, router or POS terminal running through short outages and brownouts — enough time to save files and shut down cleanly. A 6 ms transfer keeps ordinary PCs from rebooting, so work is never lost.

The unit is a horizontal desktop design weighing only 4.5 kg, so it sits under a desk, beside a cash counter or inside a weak-current cabinet. Five Schuko outlets run along the top — IEC or US socket standards are available — and an LCD on the front reports input voltage, load level and battery state at a glance. A round power button and the ventilation grille sit on the side panel, and the whole unit carries CE, FCC and RoHS certification. This 400VA offline UPS is as simple to install as a power strip: plug it in and switch on.

Five Schuko Outlets with IEC and US Socket Options

The GF400 ships with five output sockets in a single row, enough for a complete small workstation: PC, monitor, network router, desk lamp and a phone charger. Schuko (Europe) is the standard fit; IEC C13 and US standards are available for other markets, so one 400VA offline UPS platform can serve distributors in several regions without a separate tooling investment.

Each socket is recessed into the top moulding, which protects plugs from being knocked loose when the unit is pushed under a desk. Because the outlets and the LCD face up and forward, you can read the load and voltage without crawling behind the desk — a practical detail for retail counters and reception desks where the UPS sits on the floor. Explore the full range of 400VA offline UPS options.

LCD Monitoring: Voltage, Load and Battery at a Glance

A backlit LCD shows the live input voltage, the percentage of load in use and the remaining battery bars, plus a battery-mode icon. Instead of a single LED that only tells you something is wrong after the fact, the display lets you see the grid drifting before this 400VA offline UPS has to switch — useful in regions where voltage sags through the working day.

The panel doubles as a maintenance interface: when the battery nears end of life you can watch capacity drop on the bars rather than discovering it during an outage. Status is also signalled audibly, with a beep in battery mode and a distinct alarm for overload or fault. For larger installations, the GS1000 1000VA model covers 1000VA / 600W with the same interface logic.

Wide Input Range and 6 ms Transfer for Unstable Grids

Input acceptance is 162–268 Vac as standard, with a wide-range version covering 170–280 Vac, and frequency is self-adapting at 50/60 Hz. That range absorbs the deep sags and overnight surges common on weak distribution networks, so this offline UPS spends less time on battery and more time passing clean power through.

When the mains does drop, transfer takes about 6 ms — short enough that a standard ATX power supply rides through without a reboot. Protection covers short circuit, overload, overcharge and deep discharge, with audible and visual alarms for each fault condition.

Battery, Runtime and Low-Load Efficiency

Inside is a single 12V 7Ah sealed lead-acid battery, good for roughly 20 minutes on a typical desktop PC — the window you need to save open documents and shut down in order. Service life is 3–5 years depending on ambient temperature, and the battery is replaceable from the hatch on the underside, so the unit does not have to be scrapped when the cells age.

modified sine wave output suits the switched-mode supplies used by PCs, monitors, routers and POS hardware, which is why most 400VA offline UPS units are specified this way. For precision instruments or servers with active PFC supplies, choose an online (double-conversion) model instead; the GF400 is deliberately positioned as economical desktop protection for general office and retail equipment.

Application Scenarios for Office, Retail and Education

Small and medium offices: reception PCs, monitors and printers keep running through a trip, so staff can save work and close down in order. Chain-store POS: the till, barcode scanner and receipt printer share the outlet bank, so a mall power cut does not stop a transaction. Small network and weak-current rooms: routers and switches stay online during grid maintenance. School and training computer rooms: batch protection for lab PCs on a tight budget. Clinics and small studios: desktops and queue-display screens, where the wide input range matters most in areas with unstable voltage.

Optional Sockets and OEM/ODM Customization

ulinkeep runs full OEM/ODM on the GF series: packaging and logo design are quoted in 3 days, samples ship in 7 days, and free spare parts plus online technical support run for the life of the cooperation. Sockets can be built to Schuko, IEC, US, UK, Australian, Swiss, Danish, Italian, Indian, Brazilian or South African standards — the matrix below shows what we already tool for. The same 400VA offline UPS platform is also available as the GP600 600VA model for buyers who need more headroom.

GF400 Offline UPS Specifications

Frequently Asked Questions