500VA Offline UPS

The AK-500VA offline UPS is an electrical apparatus that provides emergency power to a single computer or a small set of peripherals when mains power fails. Unlike generators, it offers near-instantaneous protection (6-10ms transfer) against input power interruptions.

Its advanced CPU-controlled integrated power board ensures maximum efficiency and reliability, while the built-in automatic voltage boost and buck regulation stabilises voltage without draining the battery. The unit is housed in a sleek, lightweight enclosure (307×90×137 mm) that fits easily on a desk or shelf, making it perfect for home offices, dormitories, and small retail counters.

Core Advantages

1. Ultra-Compact and Lightweight

Weighing just 4 kg and with a footprint no larger than a typical shoebox, the 500VA Offline UPS can be installed anywhere. Its small size does not compromise performance; it delivers full 500VA power with minimal space consumption.

2. Affordable Entry-Level Protection

With the lowest acquisition cost in the AK series, this model is designed for first-time UPS buyers or those with modest power needs. It protects your PC, router, and external hard drive from data loss and hardware damage caused by sudden blackouts or voltage fluctuations.

3. Intelligent Voltage Regulation (AVR)

The built-in automatic voltage regulator corrects brownouts (low voltage) and overvoltage conditions without switching to battery, preserving battery life for when it is truly needed. This extends the overall service life of the unit and reduces unnecessary battery cycling.

4. Quiet Operation and User-Friendly Alarms

Operating at less than 40dB, the AK 500VA Offline UPS is virtually silent. Audible alarms clearly indicate battery mode (beep every 4 seconds), overload (double beep), and fault conditions (continuous beep), so you always know the system status.

Product Parameter

Application Scenarios

1. Home Desktop Computers

Protect your personal computer, monitor, and external storage devices from unexpected power outages. Sudden shutdowns can corrupt open files, damage hard drives, and shorten the lifespan of internal components. The AK-500VA provides sufficient runtime to save documents, close applications, and perform a proper system shutdown, preventing data loss and hardware damage.

2. SOHO Networking

Keep your Wi-Fi router, modem, and network switch powered during short blackouts to maintain internet connectivity. In home office environments, losing network connection during a video conference or file upload can disrupt productivity. The AK-500VA ensures your network devices remain online, allowing you to continue working through brief power interruptions.

3. Dormitory Rooms

Safeguard laptops, phone chargers, desk lamps, and small appliances in student accommodations. University dormitories often experience power flickers or brief outages, especially during peak load periods. The AK-500VA's compact size fits easily on a desk, providing basic protection for essential study and communication devices without occupying valuable space.

4. Retail POS Systems

Ensure cash registers, card terminals, and barcode scanners remain operational during brief power flickers. At the point of sale, even a momentary power loss can interrupt a transaction, causing customer frustration and potential lost sales. The AK-500VA provides instant backup to complete transactions and maintain customer service during power disturbances.

Why Choose the AK-500VA?

Compared to larger models, the AK-500VA offers the lowest entry cost and smallest footprint. It is the perfect starter UPS for users who need basic protection for one or two devices and do not require extended runtime. Its simplicity and reliability make 500VA Offline UPS a favourite among budget-conscious consumers and educational institutions.

Customization Services

KTAC TECHNOLOGY supports OEM/ODM services including logo printing, custom packaging, and optional communication ports (RS232, USB, or RJ45). Contact us to tailor the AK-500VA to your brand requirements.

Warranty & Support

Standard Warranty: 2 year（Special Edition for 3 Years）

Technical Support: Email/WhatsApp response within 48 hours

Spare Parts: Available for quick dispatch

Our Commitment

·20+ years of continuous power supply manufacturing (since 2004)

·3 factories, 8,000+ m² production floor

·100+ professional staff including QA and after-sales engineers

·Exported to 30+ countries worldwide

·Trusted by Tier-1 distributors in Southeast Asia, Africa, and Europe

FAQ

1. Can the AK-500VA power a gaming PC?

500VA Offline UPS can support a typical office PC and monitor (total <240W). For high-end gaming rigs, we recommend a higher capacity model.

2. How long is the backup time?

Depending on the load, a fully charged 4Ah battery provides approximately 5-10 minutes for a standard PC – enough to save work and shut down safely.

3. Does it protect against surges?

Yes, the built-in AVR and surge protection filter out spikes and dips, safeguarding connected equipment.

4. What should I do if the UPS alarm sounds continuously after a power outage?

A continuous beep indicates a fault condition. First, disconnect all loads from the UPS output. If the beeping stops, the connected load may exceed the UPS capacity (overload). If the beeping continues even with no load connected, the unit may have an internal fault. Please contact our after-sales support for further diagnosis. Do not attempt to open the unit yourself, as this may void the warranty and risk electric shock.

5. Can I connect the UPS to a generator or an inverter output?

This depends on the generator's output quality. The AK-500VA expects a stable 50/60Hz sine wave input. Many portable generators produce rough or unstable waveforms that may cause the UPS to repeatedly switch between line mode and battery mode. We recommend testing the generator's output with a small load before connecting the UPS. For generators with unstable output, we recommend using it in bypass mode only (without relying on UPS regulation).

6. Does the AK-500VA include communication ports for software monitoring?

The AK-500VA offers optional RS232, USB, or RJ45 communication ports. With the appropriate communication cable and monitoring software, you can view input/output voltage, load level, battery status, and configure automatic shutdown settings for your computer during extended power outages.