# Qoltec 20kVA Three-Phase AVR Voltage Stabilizer Multiprotection Expert Line with Servomotor and LCD Screen

**URL:** https://aio.lv/en/product--qoltec-51908--12649779
**Data updated:** 2026-09-05 04:22 (EEST)
**Category:** Other goods
**Manufacturer:** QOLTEC
**Manufacturer code:** 51908
**EAN:** 5901878519081
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1 059.99 €
**Prices and availability valid until:** 2026-10-16 23:59
**Price without VAT (21%):** 876.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51908--12649779

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.09.2026 | free |
| Courier delivery to door | 30.09.2026 | 53.99 EUR |

## Summary description

Protect your sensitive electrical equipment from voltage fluctuations with the Qoltec 20kVA three-phase AVR voltage stabilizer. Featuring reliable servomotor technology, a high accuracy of ± 3%, and a clear LCD screen, this Expert Line device ensures stable power supply for industrial, commercial, and residential applications. Designed for continuous monitoring and safety, it prevents power surges and equipment damage effectively.

## Long description

The Qoltec 20kVA Three-Phase AVR Voltage Stabilizer Multiprotection Expert Line with Servomotor and LCD Screen is designed to protect sensitive electrical equipment from voltage fluctuations. By utilizing reliable servomotor technology, this three-phase voltage stabilizer maintains a high output accuracy of plus or minus 3 percent, ensuring a steady and reliable power supply for demanding electrical environments. Equipped with a clear LCD screen, the device allows for continuous monitoring of operating parameters, making it a dependable choice for maintaining equipment safety and longevity.
Advantages
This three-phase AVR stabilizer offers comprehensive protection against power surges, voltage drops, and electrical irregularities that can compromise connected devices. The integrated servomotor provides smooth and precise voltage regulation across all three phases, reducing the risk of unexpected shutdowns or component degradation. Built for performance within the Expert Line series, it combines advanced safety features with robust construction, delivering consistent power conditioning for continuous operation in various settings.
Suitable for
Industrial machinery and automated production lines requiring stable three-phase power
Commercial office buildings and retail spaces with sensitive electronic equipment
Residential properties with unstable grid voltage feeding multiple heavy-duty appliances
Telecommunications infrastructure and server rooms needing reliable voltage regulation
When it may not be suitable
This device may not be appropriate for single-phase electrical systems or applications requiring a capacity significantly lower or higher than 20kVA. Additionally, environments with extreme physical hazards or outdoor locations without adequate weather protection are not suitable for this indoor-rated unit.
Key specifications
Capacity: 20kVA
Phase type: Three-phase
Technology: Servomotor
Output voltage accuracy: plus or minus 3 percent
Display type: LCD screen
Product line: Expert Line
How to use
Installation and connection of the voltage stabilizer should be performed by a qualified electrician in accordance with local electrical codes and safety regulations. Ensure that the total power consumption of the connected appliances does not exceed the 20kVA capacity of the unit. Mount the device in a dry, well-ventilated area free from excessive dust and moisture. Once properly wired to the main power supply and the load, power on the unit to allow the automatic regulation system to begin monitoring and stabilizing the incoming voltage.
What to consider before purchase
Verify that your electrical system is three-phase and compatible with a 20kVA capacity
Calculate the total wattage and surge requirements of your connected equipment
Ensure adequate physical space and ventilation at the installation site
Confirm that installation by a certified professional is arranged
Usage recommendations: Regularly check the LCD screen to monitor operating status and ensure that the ventilation openings remain unobstructed to prevent overheating during continuous operation.

## FAQ

### How much does the Qoltec 20kVA Three-Phase Voltage Stabilizer AVR cost, and is it available for purchase?

The price is 1,059.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 25.09.2026 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, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Qoltec 20kVA Three-Phase Voltage Stabilizer AVR 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/12649779/69823167_large.webp