# Uninterruptible Power Supply QOLTEC 53981 On line 2kVA, 2000 VA capacity

**URL:** https://aio.lv/en/product--qoltec-53981--10633348
**Data updated:** 2026-02-12 22:01 (EET)
**Category:** UPS
**Manufacturer:** QOLTEC
**Manufacturer code:** 53981
**EAN:** 5901878539812
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 302.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 250.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-53981--10633348

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 13.04 EUR |

## Summary description

QOLTEC 53981 is an on-line uninterruptible power supply with 2 kVA (2000 VA) capacity designed to provide continuous, regulated power to critical equipment. It delivers online double-conversion protection against power interruptions, voltage fluctuations and frequency variations. Suitable for servers, network devices and sensitive electronics, it ensures clean power and allows safe shutdown during extended outages.

## Long description

QOLTEC 53981 On line 2kVA is an on-line uninterruptible power supply with a rated capacity of 2000 VA designed to provide continuous, regulated power to critical equipment. The unit uses double-conversion topology to deliver stable, clean AC output regardless of input disturbances, protecting connected devices from power interruptions, voltage sags and spikes, and frequency variations. The UPS supports safe, controlled shutdown of systems during extended outages and maintains full voltage regulation for sensitive electronics and network infrastructure.
Advantages
The on-line double-conversion design provides consistent sine-wave output with near-zero transfer time, ensuring uninterrupted operation for servers, storage systems and communication equipment. Built-in voltage regulation and filtering reduce electrical noise and protect against harmonic distortion. The 2000 VA capacity balances power and footprint for small-to-medium equipment racks and standalone installations. The UPS is suitable for continuous operation and offers predictable performance under varying mains conditions.
Suitable for
Rack or tower servers
Network switches, routers and firewalls
Storage arrays and NAS devices
Industrial control systems and sensitive laboratory instruments
VOIP systems and telecom equipment
Key specifications
Topology: on-line double-conversion UPS
Rated capacity: 2000 VA
Output waveform: pure sine wave
Input voltage range: wide input tolerance for unstable mains
Output voltage regulation: continuous AVR (automatic voltage regulation)
Frequency regulation: accepts frequency variations and provides stable output
Form factor: suitable for rack-mount or tower placement (check model-specific mounting options)
Interfaces: monitoring and control connectivity for orderly shutdown and status reporting
How to use
Install the UPS on a stable surface or in a compatible rack following the manufacturer’s mounting instructions. Connect critical equipment to the UPS output sockets and plug the UPS input into a properly grounded mains outlet. Configure monitoring and shutdown software where available to enable automatic, controlled power-off of connected systems. Periodically test the UPS by performing simulated power-fail tests to verify battery condition and proper transfer to battery operation.
Usage recommendations
Place the UPS in a ventilated, dust-free environment with ambient temperature within the recommended operating range. Maintain battery health by avoiding prolonged deep discharge and schedule professional battery replacement according to runtime needs and battery life specifications. Use the UPS monitoring features to log events and plan preventive maintenance to ensure continuous protection of critical equipment.

## FAQ

### How much does the UPS QOLTEC 53981 On line 2kVA cost, and is it available for purchase?

The price is 302.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 94 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 29.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can UPS QOLTEC 53981 On line 2kVA be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All QOLTEC products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized QOLTEC service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10633348/54567721_large.webp