# Hybrid off-grid solar inverter QOLTEC 3.5kVA/3.5kW 100A MPPT LCD BMS Pure Sine

**URL:** https://aio.lv/en/product--qoltec-53870--11079655
**Data updated:** 2026-03-11 11:59 (EET)
**Category:** Power Inverters
**Manufacturer:** QOLTEC
**Manufacturer code:** 53870
**EAN:** 5901878538709
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 383.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 316.93 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-53870--11079655

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 6.32 EUR |

## Summary description

Hybrid off-grid solar inverter QOLTEC with 3.5kVA (3.5kW) output and 100A battery current support. Integrated MPPT charge controller, LCD display for status and settings, and BMS compatibility for battery management. Designed for standalone solar systems to convert DC from panels/batteries to AC for household or small commercial loads, backup power, and energy storage integration.

## Long description

The Hybrid off-grid solar inverter QOLTEC 3.5kVA/3.5kW 100A MPPT LCD BMS Pure Sine is a compact hybrid inverter designed for standalone solar systems. It converts DC power from solar panels and batteries into clean pure sine AC suitable for household and small commercial appliances. The unit combines inverter, MPPT solar charge controller and battery management compatibility in a single enclosure, with an LCD for system status, configuration and fault information.
Advantages
This hybrid inverter provides continuous 3.5 kW output with pure sine wave quality for stable operation of sensitive electronics. The integrated MPPT charger optimizes solar energy harvest with up to 100 A battery charging capability, reducing dependence on external charge controllers. LCD feedback offers clear monitoring of input, output and battery parameters, and BMS compatibility enables coordinated battery protection and longer service life. Compact design simplifies installation in off-grid and backup setups.
Suitable for
Standalone residential solar systems for powering household appliances
Small commercial sites requiring backup power and off-grid operation
Energy storage systems combining solar panels and batteries with BMS integration
Backup power for medical devices, communication equipment, and office electronics
Key specifications
Rated power output: 3.5 kW (3.5 kVA)
Waveform: Pure sine wave output suitable for sensitive loads
Battery charging current: up to 100 A via integrated MPPT controller
Integrated MPPT charge controller for efficient solar harvesting
LCD display for status, settings and fault diagnostics
BMS compatibility for coordinated battery management
Suitable for DC input from solar panels and batteries; AC output for household loads
How to use
Install the inverter on a stable, ventilated surface away from direct sunlight and moisture. Connect the DC side to a solar array and battery bank following polarity and recommended cable sizing; connect AC output to the consumer distribution or loads via appropriate circuit protection. Use the LCD interface to configure charging parameters, AC priority and system modes. Verify BMS communication wiring if integrating an intelligent battery management system. Perform initial checks of input voltages and system grounding before enabling the inverter.
Usage recommendations
For reliable operation, use batteries and wiring sized for the inverter's 3.5 kW output and 100 A charging current. Ensure the BMS settings match the inverter charge profile and regularly monitor the LCD for warnings or fault codes. Maintain adequate ventilation and keep firmware and configuration aligned with manufacturer guidance where available.

## FAQ

### How much does the Hybrid off-grid inverter QOLTEC 3.5kVA 3.5kW cost, and is it available for purchase?

The price is 383.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 20.07.2026 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 Hybrid off-grid inverter QOLTEC 3.5kVA 3.5kW 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/11079655/65907804_large.webp