# Power inverter QOLTEC Monolith 600 W — 12 V to 230 V, USB PD 18 W, car/indoor, black

**URL:** https://aio.lv/en/product--qoltec-51925--10670601
**Data updated:** 2026-01-21 11:01 (EET)
**Category:** Power Inverters
**Manufacturer:** QOLTEC
**Manufacturer code:** 51925
**EAN:** 5901878519258
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 33.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 28.09 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51925--10670601

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Pickup points | 22.06.2026 | 1.99 EUR |
| Courier delivery to door | 22.06.2026 | 4.99 EUR |

## Summary description

QOLTEC Monolith is a 600 W DC-to-AC power inverter designed for car and indoor use. It converts 12 V input to 230 V output at 50 Hz with 90% efficiency and 0.5 A output current. Features include USB Power Delivery up to 18 W, short-circuit protection, LED indicators, built-in fan and active cooling. Compact and portable—ideal for powering appliances and charging devices on the go.

## Long description

The Qoltec Monolith voltage converter 1200 MS Wave (model 51925) converts 12V DC to 230V AC and provides up to 600 W continuous (1200 W peak) output with a USB port and built-in European mains sockets. Designed for car and indoor use, it features active fan cooling, soft-start functionality and comes with spare fuses. The compact black aluminium housing (106 × 210 × 55 mm) is CE certified and intended to power small household and electronic devices where grid power is not available.
Advantages
The modified sine wave design offers a simpler structure and lower failure rate for devices that do not require a pure sine output. Built-in protections (UVP, OVP, OCP, SCP, OTP) and an included spare fuse increase operational safety. The unit combines mains outlets and a USB port in a lightweight, shock-resistant aluminium case with active cooling and soft-start to reduce start-up load.
Suitable for
Charging smartphones, tablets and laptops
Powering RTV equipment: TV, game console, music players
Small kitchen appliances up to the inverter's rated power (e.g., kettle, toaster where applicable)
Office equipment: computers, printers (within power limits)
Use in campers, trailers, yachts and as a temporary UPS during power outages
Key specifications
Brand: QOLTEC
Model / MPN: 51925
EAN: 5901878519258
Input voltage: 12 V DC
Output voltage: 230 V AC
Continuous power: 600 W; Peak power: 1200 W
Output waveform: Modified sine wave
Cooling: Active fan
Ports: European mains sockets, USB
Dimensions (W×D×H): 106 × 210 × 55 mm
Weight: 0.798 kg
Certifications: CE
How to use
Connect the inverter to a 12 V vehicle battery or compatible 12 V source, ensuring correct polarity. Plug devices into the built-in European sockets or the USB port. When connecting multiple devices, add their power consumption and make sure total load does not exceed 85% of the inverter's rated continuous power to maintain stable operation. Use the soft-start feature to reduce surge stress on the battery and connected equipment.
Usage recommendations
For reliable operation, match the battery voltage to the inverter's 12 V input, keep the fan intake clear for proper cooling, and avoid connecting devices that require a pure sine wave. For devices with high start-up currents, allow margin between their combined load and the inverter's rated power; keep total continuous load below the specified limit and replace fuses only with identical ratings supplied with the unit.

## Specifications

| Feature | Value |
|---|---|
| USB Power Delivery up to | 18 W |

### Design

| Feature | Value |
|---|---|
| LED indicators | Y |
| Product colour | Black |
| Cooling type | Active |
| Suitable for indoor use | Yes |
| Built-in fan | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.798 kg |
| Height | 55 mm |
| Width | 106 mm |
| Depth | 210 mm |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | DC |
| Quantity per pack | 1 pc(s) |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | Poland |

### Features

| Feature | Value |
|---|---|
| Power supply type | Auto/Indoor |
| Input voltage | 12 |
| Output voltage | 230 |
| Purpose | Car inverter |
| Output current | 0.5 A |
| Efficiency | 90 % |
| Output power | 600 W |
| Power protection features | Over current, Under voltage, Short circuit, Overheating, Over voltage |
| Suitable location | Car |
| Power current type | DC-to-AC |
| Output frequency | 50 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 1094 g |
| Package depth | 147 mm |
| Package height | 70 mm |
| Package width | 290 mm |
| Package type | Box |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | CE |

## FAQ

### How much does the QOLTEC Monolith 600 W power inverter cost, and is it available for purchase?

The price is 33.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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 Wednesday 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. All transactions are 100% secure and encrypted.

### 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, purpose, power supply type, input voltage, output voltage, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/10670601/64862610_large.webp