# KEMOT PROsinus-500 Uninterruptible Power Supply, 12V to 230V, 500VA/300W, Pure Sine Wave Converter

**URL:** https://aio.lv/en/product--kemot-urz3404b--11049340
**Data updated:** 2026-06-02 20:08 (EEST)
**Category:** UPS
**Manufacturer:** KEMOT
**Manufacturer code:** URZ3404B
**EAN:** 5901890025362
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 85.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 70.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kemot-urz3404b--11049340

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.89 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

The KEMOT PROsinus-500 is a reliable uninterruptible power supply featuring a pure sine wave converter. Designed for 12V DC to 230V AC conversion, it provides 500VA/300W of power. Equipped with an integrated charging function, this device ensures stable power for sensitive electronics during outages. Ideal for home and office use, it maintains optimal performance for devices requiring high-quality power output.

## Long description

The KEMOT PROsinus-500 is a high-performance uninterruptible power supply designed to provide a stable 230V AC power source from a 12V DC battery. Featuring a pure sine wave output, this device ensures that sensitive electronic equipment operates safely and efficiently without the risk of interference or damage caused by modified waveforms. With a capacity of 500VA and 300W, it serves as a dependable backup solution for maintaining critical systems during unexpected power outages.
Advantages
The primary benefit of the KEMOT PROsinus-500 is its pure sine wave technology, which mimics the quality of standard grid electricity, making it perfectly compatible with motors, pumps, and sophisticated electronics. The integrated automatic charging function allows the device to keep the connected battery ready for use at all times, simplifying the maintenance of your backup power system. Its compact design and robust construction make it a versatile addition to any home or office environment where power reliability is essential.
Suitable for
Central heating pumps and furnace controllers
Home office equipment such as computers and routers
Small household appliances requiring stable power
Emergency lighting systems
Security and surveillance cameras
This device may not be suitable for high-power appliances that exceed its 300W continuous output limit, such as electric heaters, kettles, or large power tools. It is also not intended for industrial-scale power requirements or long-term off-grid living without an appropriately sized battery bank.
Key specifications
Output power: 500VA / 300W
Output waveform: Pure sine wave
Input voltage: 12V DC
Output voltage: 230V AC
Integrated battery charger: Yes
Application: Backup power for sensitive electronics
To use the device, connect a compatible 12V battery to the input terminals, ensuring the polarity is correct. Plug your appliances into the AC output socket on the front panel. Once connected to the mains, the device will automatically charge the battery and switch to inverter mode instantly if the grid power fails. Ensure the unit is placed in a well-ventilated area to prevent overheating during operation.
What to consider before purchase
Ensure your battery capacity is sufficient for your required backup duration
Verify that the total power consumption of your devices does not exceed 300W
Check that the device is placed in a dry, dust-free environment
Confirm compatibility with your specific 12V battery type
For optimal performance and longevity, use a deep-cycle battery and ensure the ventilation slots remain unobstructed during operation.

## FAQ

### How much does the KEMOT PROsinus-500 Uninterruptible Power Supply 500VA/300W cost, and is it available for purchase?

The price is 85.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 82 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 03.07.2026 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 KEMOT PROsinus-500 Uninterruptible Power Supply 500VA/300W 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 KEMOT 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 KEMOT 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/11049340/65889558_large.webp