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

**URL:** https://aio.lv/en/product--kemot-lec-urz3404--11105900
**Data updated:** 2026-06-02 20:10 (EEST)
**Category:** UPS
**Manufacturer:** KEMOT
**Manufacturer code:** LEC-URZ3404
**EAN:** 5901890013086
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 84.99 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 70.24 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kemot-lec-urz3404--11105900

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The KEMOT PROsinus-500 is a reliable uninterruptible power supply and voltage converter designed to provide pure sine wave output. With a capacity of 500VA/300W, it operates on a 12V battery system to deliver stable 230V AC power. Featuring an integrated charging function, it is ideal for maintaining power to sensitive electronic devices, heating systems, and home appliances during electrical outages.

## Long description

The KEMOT PROsinus-500 is a high-quality uninterruptible power supply and voltage converter engineered to provide a stable pure sine wave output. Designed to bridge the gap during power outages, this device converts 12V DC battery power into reliable 230V AC electricity. With a power capacity of 500VA and 300W, it ensures that connected equipment continues to operate smoothly without interruption, making it an essential component for maintaining home comfort and safety.
Advantages
The primary benefit of the KEMOT PROsinus-500 is its ability to produce a pure sine wave, which is identical to the electricity provided by standard wall outlets. This makes it perfectly safe for sensitive electronics that might otherwise be damaged by modified sine wave inverters. Additionally, the device features an integrated automatic battery charging function, allowing it to maintain the connected battery at optimal levels while grid power is available. Its compact design and efficient operation make it a versatile solution for various household power needs.
Suitable for
Central heating pumps and furnace controllers
Home security systems and surveillance cameras
Computers, routers, and networking equipment
Small household appliances and LED lighting
When it may not be suitable
This device is not intended for high-power appliances that exceed its 300W continuous output limit, such as electric kettles, heaters, or power tools. Attempting to draw more power than the rated capacity will trigger the overload protection and shut down the unit.
Key specifications
Output power: 500VA / 300W
Output waveform: Pure sine wave
Input voltage: 12V DC
Output voltage: 230V AC
Integrated battery charger: Yes
How to use
To use the KEMOT PROsinus-500, connect a compatible 12V external battery to the input terminals, ensuring correct polarity. Plug the device into a standard 230V wall socket to allow the internal charger to maintain the battery. Connect your electronic devices to the output socket on the unit. In the event of a power failure, the device will automatically switch to battery mode, providing continuous power to your connected equipment.
What to consider before purchase
Ensure your external 12V battery is in good condition and has sufficient capacity for your needs.
Verify that the total power consumption of your devices does not exceed 300W.
Check that the device is placed in a well-ventilated area to prevent overheating.
Usage recommendations
For optimal performance and longevity, use a deep-cycle battery specifically designed for UPS or solar applications. Regularly check the battery connections for corrosion and ensure the firmware or settings are appropriate for your specific battery type.

## FAQ

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

The price is 84.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 120 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 14.07.2026 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 Converter 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/11105900/65889557_large.webp