3000VA Offline UPS

Model: AK-3000VA

Power Capacity: 3000VA / 1800W

Waveform (Battery Mode): Simulated Sine Wave

Battery: 12V/9Ah ×4

Certification: CE, ROHS (available)

Lead Time: 7-10 days

The AK 3000VA Offline UPS is the largest and most powerful offline UPS in the AK series, capable of supporting heavy loads such as multiple servers, large network switches, industrial controllers, and even small air‑conditioning units (with proper derating).

Its four 12V/9Ah batteries provide a total capacity of 432Wh, offering up to 20‑25 minutes of runtime at half load and 8‑10 minutes at full load – sufficient for most critical applications to complete emergency shutdowns or transfer to generator power.

The unit’s robust construction, intelligent cooling, and precision voltage regulation make it a reliable guardian for high‑value equipment.

Core Advantages

1. Maximum Power Capacity (1800W)

The AK 3000VA Line Interactive UPS can handle the most power‑hungry devices – from rack‑mount servers and storage arrays to large‑format printers and medical diagnostic machines. Its headroom ensures stable operation even when loads fluctuate.

2. Longest Runtime in the Series

With four 9Ah batteries, this model provides the highest stored energy. At 50% load (900W), runtime exceeds 20 minutes, giving operators ample time to save data and safely power down systems.

3. Industrial‑Grade Transformer and Cooling

The oversized laminated transformer, built with high‑grade silicon steel, delivers exceptional efficiency and minimal temperature rise. The unit’s large chassis allows for natural convection cooling, reducing reliance on fans and ensuring silent operation (≤40dB).

4. Advanced Protection and Monitoring

In addition to standard short‑circuit, overload, and low‑battery protection, the AK‑3000VA features over‑voltage and under‑voltage cut‑off. Optional communication ports (RS232/USB/RJ45) enable remote monitoring, event logging, and automatic shutdown via UPS management software – essential for unattended facilities.

Key Application Scenarios

1. Large Data Centres

The AK 3000VA Offline UPS's 1800W capacity supports up to ten standard 1U servers or a full rack of network switches, providing sufficient runtime for automated failover to backup systems or orderly virtual machine migration.

2. Medical Imaging

The AK-3000VA's AVR circuit stabilises incoming power, while the 6-10ms transfer time ensures continuous operation of diagnostic consoles and image reconstruction workstations.

3. Industrial Manufacturing

The AK-3000VA provides clean, regulated power to control systems, preventing production line stoppages that can cost thousands per hour in lost output.

4. Telecom Central Offices

The AK-3000VA's four 9Ah batteries deliver extended runtime to bridge gaps between grid failure and generator startup, ensuring continuous voice and data service to thousands of subscribers.

5. Critical Infrastructure

The AK-3000VA's robust construction and high-capacity battery bank provide reliable backup for traffic management centres, emergency dispatch, and surveillance operations during prolonged outages.

Product Parameter

Why Choose the AK-3000VA Over the AK-2000VA?

The AK-3000VA delivers 50% more power than the AK-2000VA while maintaining nearly the same physical footprint. It is the flagship choice for enterprise environments where 1200W is insufficient but a full online UPS is not yet justified. The standard 9Ah battery bank provides substantial energy reserve for critical loads, and the rugged construction ensures reliable operation in demanding conditions.

Customization Services

KTAC provides OEM and ODM customization for the AK 3000VA Offline UPS to meet specific brand, application, and project requirements.

Visual Branding

Custom enclosure colour and logo printing on the front panel. Brand labels and serial number plates can be designed to your specifications.

Packaging Solutions

Retail-ready boxes with your artwork and branding. Inner foam inserts can be customised to secure the unit and accessories during shipping. Multi-language user manuals available upon request.

Communication Interface Options

Optional RS232, USB, or RJ45 communication ports can be factory‑installed. Management software (UPSilon or compatible) is available for automatic shutdown and remote monitoring integration.

Parameter Adjustments

Output voltage settings, alarm volume, and AVR sensitivity can be pre‑configured at the factory to match regional requirements or specific application needs. Battery recharge parameters can also be adjusted for different battery chemistries upon request.

Warranty & After-Sales Support

Standard Warranty Coverage

Every AK-3000VA unit is backed by a 24-month standard warranty covering manufacturing defects and component failures under normal operating conditions. For select heavy‑duty models, an extended 36-month warranty is available upon request, providing additional protection for mission‑critical installations.

Technical Support

Our after‑sales team provides technical support via email and WhatsApp with a response commitment of 48 hours during business days. For urgent issues, priority support channels are available for volume customers.

Spare Parts Availability

Commonly replaced components—including batteries, fuses, and fan assemblies—are kept in stock for fast dispatch. We maintain a spare parts inventory to minimise downtime for critical installations.

Remote Assistance

For installation guidance, configuration questions, or troubleshooting, we offer video call support to guide on‑site personnel through the process. This reduces the need for costly service visits and speeds up resolution.

Factory‑Level Repairs

For units requiring factory service, we provide RMA (Return Material Authorization) processing with clear instructions for return shipping. Repairs are performed at our ISO9001:2015 certified facility, and units are tested to full specification before return.

FAQ

1. Can the AK 3000VA Line Interactive UPS be connected in parallel for even higher power?

No, the AK series does not support parallel operation. For higher power, please consider our online UPS series.

2. How long does it take to recharge the four 9Ah batteries?

The standard recharge time is 8 hours to 90% capacity. The charger is designed to prevent overcharging, ensuring long battery life.

3. Is the output pure sine wave?

No, this is a simulated (stepped) sine wave. For pure sine wave requirements, we recommend our online UPS models. However, simulated sine wave is sufficient for most switching power supplies and modern electronics.

4. What is the typical maintenance interval?

We recommend checking battery condition every 6‑12 months. The unit is maintenance‑free except for battery replacement every 3‑5 years, depending on usage and ambient temperature.

5. Can the AK-3000VA support a 3‑phase load?

No. The AK-3000VA is a single‑phase UPS, designed for 220VAC or 110VAC single‑phase input and output. It cannot support three‑phase motors or equipment requiring 380/400V three‑phase power. For three‑phase applications, please consider our three‑phase UPS solutions.

6. What is the acceptable input voltage range for the AVR to work without switching to battery?

The AVR circuit operates within two selectable ranges:

Wide range: 81‑145VAC or 145‑275VAC (automatically boosts or bucks voltage to maintain stable output)

Narrow range: 170‑280VAC (for UPS mode, where faster response to grid anomalies is required)

When the input voltage stays within these ranges, the UPS regulates output without draining the battery. Outside these ranges, the unit transfers to battery mode to protect connected equipment.

7. How do I know when the batteries need replacement?

The AK 3000VA Offline UPS does not have a built‑in battery self‑test feature. However, the following signs indicate battery replacement is needed:

Backup time becomes noticeably shorter (e.g., from 20 minutes to under 10 minutes at the same load)

The UPS beeps frequently during normal operation without grid issues

The red LED remains on even when mains power is present

The unit shuts down immediately after switching to battery mode

We recommend performing a manual load test annually by disconnecting mains power and measuring actual runtime with a known load. If runtime has degraded by more than 50% from the original specification, it is time to replace the batteries.