| Capacity | 1000VA / 600W |
| Topology | Offline (standby) |
| Waveform | Simulated sine wave |
| Input voltage range | 140–300 VAC |
| Transfer time | 4–8 ms (13 ms max) |
| Battery | 12V 7Ah lead-acid × 2 |
| Backup time | ≈ 20 min for a desktop PC |
| Output sockets | 3 × universal + 250Vac/10A breaker |
| Protection | Short circuit / overload / overcharge / overdischarge |
| AVR | Boost & buck automatic regulation |
| Net weight | ≈ 4 kg |
| Warranty | 1 year |
The GS1000 is an economical 1000VA / 600W offline (standby) tower UPS with AVR voltage regulation and 4–8 ms transfer — simple PC backup power for offices, POS counters and monitoring rooms.
Reliable 1000VA Offline UPS for PC and Office Equipment
The GS1000 offline UPS is ulinkeep’s economical standby tower unit for desktop PCs, cash registers, CCTV recorders and small network devices. When utility power fails, it transfers to battery in 4–8 ms and keeps equipment running long enough to save files and shut down safely — no lost orders, no corrupted data.
The black tower chassis keeps operation deliberately simple: one ON/OFF power button and one STATUS LED on the front panel, and quiet side ventilation with no fan noise above 40 dB. As an entry-level uninterruptible power supply, it offers a compact footprint and a friendly price — the most common PC backup power choice for SMB offices, retail counters and monitoring rooms.
Watch the 45-second demo: metal case, compact size, one-button start, automatic charging and short-circuit protection.
Front Panel: One Button, Clear Status at a Glance
Press the ON/OFF button to start or stop the UPS; the STATUS LED shows the power state instantly. In NORMAL state the LED lights steady green while mains supply is present. In BACKUP state the LED flashes orange with a beep every 10 seconds while the offline UPS runs on battery; when the battery runs low the buzzer beeps every second to warn you to save your work and shut down. On fault, the LED turns red and the buzzer sounds continuously.
Rear Panel: Universal Sockets, Breaker and AC Input
Three universal output receptacles accept local plugs for PC hosts, monitors and POS terminals, protected by a 250Vac/10A circuit breaker; the AC input keeps charging the battery even when the UPS is switched off (off-mode charging). Protection covers short circuit, overload, overcharge and overdischarge. The unit is generator compatible and supports cold start, so the offline UPS can be powered up directly from battery without mains.
Application Scenarios for Offline UPS Backup
This offline UPS suits scenarios where short backup and stable voltage matter more than long runtime: SMB offices (front-desk PC, cash-drawer host, printer), chain-store POS counters (POS + scanner + receipt printer), monitoring and weak-current rooms (DVR/NVR, small switches), education and training labs, and small clinics or studios.
In regions with unstable grids, the boost/buck AVR regulates high or low mains first, so the battery is saved for real outages. If you need DC backup for routers and IP cameras instead, our B600T mini DC UPS covers 12V DC loads.
OEM/ODM Customization for Your Brand
Ulinkeep supports full OEM/ODM for this standby series (400VA–2000VA): logo silkscreen and panel customization, drawing-based and sample-based development, custom socket standards (EU/US/UK/universal), voltage output and packaging. Custom design proposals in 3 days, samples in 7 days, free replacement parts and online technical support during cooperation.
Packaging and logo/graphic customization start from 500 sets — a proven path for distributors, computer channel resellers and system integrators building their own brand on this offline UPS platform.
GS1000 Offline UPS Specifications
Backup power comes from two 12V 7Ah lead-acid batteries, giving roughly 20 minutes for a standard desktop PC, with a maximum charge current of 1.0 A. The specification sheet below is shared by the 400VA–2000VA standby series; the GS1000 is the 1000VA / 600W model.
| Specification | Value |
|---|---|
| Model | GS1000 |
| Capacity | 1000VA / 600W |
| Topology | Offline (standby) |
| Waveform (battery mode) | Simulated sine wave |
| Input voltage range | 140–300 VAC |
| Input frequency | 50/60 Hz auto sensing |
| Output voltage (battery mode) | 220/230/240 VAC ± 10% |
| Output frequency (battery mode) | 50 Hz ± 1 Hz or 60 Hz ± 1 Hz |
| Transfer time | Typical 4–8 ms, 13 ms max |
| Battery | 12V 7Ah lead-acid × 2 |
| Backup time | ≈ 20 minutes for a desktop PC |
| Maximum charge current | 1.0 A |
| Output sockets | 3 × universal receptacles, 250Vac/10A breaker |
| Indicators | AC mode: green / battery mode: orange flash / fault: red |
| Alarm | Battery mode: every 10 s; low battery: every 1 s; overload: every 0.5 s; fault: continuous |
| Protection | Short circuit, overload, overcharge, overdischarge |
| AVR | Boost and buck automatic voltage regulation |
| Dimension (D×W×H) | 345 × 123 × 189 mm |
| Net weight | ≈ 4 kg |
| Operating environment | 0–90% RH @ 0–40°C (non-condensing), noise < 40 dB |
| Warranty | 1 year |
| Brand | ulinkeep |
Frequently Asked Questions
How many PCs can the GS1000 offline UPS support, and for how long?
Rated 1000VA/600W — it carries one standard desktop PC for about 20 minutes. For a PC plus monitor, calculate by actual load; it is designed for graceful shutdown, not extended work.
Does it work in regions with unstable voltage?
Yes. The input range is 140–300 VAC with boost/buck AVR: the offline UPS stabilizes high or low mains first and switches to battery only when power truly fails, saving battery life.
Will my computer reboot during the switch?
Transfer time is 4–8 ms typical (13 ms max) — short enough for normal PCs. For precision servers, choose a true online (double-conversion) UPS instead.
What waveform does it output, and what can it power?
A simulated (modified) sine wave, suitable for computers, monitors, POS terminals and CCTV recorders. Avoid motor-driven inductive loads and precision medical equipment.
How long does the battery last, and can I replace it myself?
The 12V 7Ah lead-acid batteries last 3–5 years. We recommend replacement by a qualified technician; overcharge, overdischarge, short-circuit and overload protection plus low-battery alarms are built in.
What is the MOQ and lead time for customization?
Packaging and logo customization start from 500 sets. Custom artwork in 3 days, samples in 7 days, 1-year warranty with free spare boards for quality issues.
