# Off-grid solar inverter QOLTEC 11000W model 53862, pure sine wave, battery-charger compatible

**URL:** https://aio.lv/en/product--qoltec-53862--11424040
**Data updated:** 2026-02-17 11:01 (EET)
**Category:** Power Inverters
**Manufacturer:** QOLTEC
**Manufacturer code:** 53862
**EAN:** 5901878538624
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 776.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 642.14 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-53862--11424040

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.89 EUR |
| Courier delivery to door | 09.07.2026 | 12.97 EUR |

## Summary description

Off-grid solar inverter QOLTEC 11000W model 53862 converts DC from batteries or solar arrays to AC for standalone systems. Designed for off-grid use, it delivers 11 kW continuous output, supports pure sine wave output and battery charging, and is suitable for powering household appliances, tools and small commercial loads. Offers reliable power conversion and integration with battery banks.

## Long description

The QOLTEC 11000W off-grid solar inverter model 53862 is a standalone power conversion device that transforms DC from battery banks or solar arrays into AC suitable for household and small commercial equipment. Designed for off-grid applications, this inverter delivers a continuous output of 11 kW with a pure sine wave output, ensuring stable and clean power for sensitive electronics, motors and appliances. It also includes a built-in battery charger function to manage charging from AC sources when available, enabling hybrid operation and flexible energy management in systems without grid connection.
Advantages
This inverter produces a pure sine wave output to reduce electrical noise and protect sensitive devices. With an 11 kW continuous rating it supports high-demand loads while maintaining stable voltage and frequency. The integrated battery charger function simplifies system design by allowing controlled charging of battery banks from AC sources, and the unit is engineered for off-grid reliability with features that support battery integration and standalone operation.
Suitable for
Powering household appliances such as refrigerators, washing machines and lighting in off-grid homes
Supplying small commercial loads including workshops, shops and remote offices
Integrating with solar PV arrays and battery banks for standalone energy systems
Running sensitive electronics and motor-driven equipment that require a pure sine wave
Key specifications
Continuous AC output power: 11000 W
Output waveform: pure sine wave
Input sources: DC from batteries or solar arrays, AC for battery charging
Integrated battery charger: included (specifications depend on installation)
Application: off-grid standalone inverter for residential and small commercial systems
How to use
Install the inverter according to local electrical codes and manufacturer guidance, mounting it in a dry, ventilated location with adequate clearance. Connect the DC input to a compatible battery bank with appropriately sized cables and fuses; connect the AC output to the distribution panel or loads. If using the battery charger function, connect an AC source as required and configure charging parameters per battery type. Commission the system by verifying DC voltages, polarity, and protective devices before energizing the AC output, and monitor performance during initial operation.
Usage recommendations
Use appropriately sized battery capacity and cabling to match the 11 kW continuous output; ensure overcurrent protection and correct grounding. For reliable operation, select batteries compatible with the inverter's charger settings and perform periodic maintenance checks on connections, ventilation, and firmware updates where applicable. When powering inductive loads, account for high startup currents and configure system protections accordingly.

## FAQ

### How much does the Off-grid solar inverter QOLTEC 11000W 53862 cost, and is it available for purchase?

The price is 776.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 35 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 06.07.2026 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, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Off-grid solar inverter QOLTEC 11000W 53862 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/11424040/66064653_large.webp