# Off-grid solar inverter QOLTEC 3500W model 53864 for standalone photovoltaic systems

**URL:** https://aio.lv/en/product--qoltec-53864--11419565
**Data updated:** 2025-12-30 21:17 (EET)
**Category:** Power Inverters
**Manufacturer:** QOLTEC
**Manufacturer code:** 53864
**EAN:** 5901878538648
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 232.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 192.14 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-53864--11419565

## 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 | 4.99 EUR |

## Summary description

Off-grid solar inverter QOLTEC 3500W (model 53864) converts DC from photovoltaic panels or batteries into AC for standalone power systems. Designed for off-grid use, it supports typical household and small commercial loads, provides continuous 3500W output, and protects equipment with built-in safety features. Suitable for remote cabins, backup power, and mobile installations.

## Long description

Off-grid solar inverter QOLTEC 3500W model 53864 converts DC power from photovoltaic panels or battery banks into AC power for standalone photovoltaic systems. Designed for off-grid operation, the inverter provides a continuous 3500W AC output and incorporates built-in protective functions to safeguard connected equipment and the unit itself. The device is suitable for typical household and small commercial loads, remote cabins, backup power and mobile installations such as RVs or boats.
Advantages
The QOLTEC 3500W inverter delivers a stable continuous output of 3500W for off-grid applications and performs reliable DC-to-AC conversion for photovoltaic arrays and battery systems. Integrated safety features reduce the risk of damage to appliances and the inverter, and the product is engineered specifically for standalone (off-grid) use where grid connection is unavailable or not required.
Suitable for
Remote cabins and off-grid homes
Backup power for essential household loads
Mobile installations (RVs, boats)
Small commercial sites or workshops without grid access
Standalone photovoltaic systems with battery storage
Key specifications
Brand: QOLTEC
Model: 53864
MPN: 53864
EAN: 5901878538648
Category: Power Inverters
Continuous AC output: 3500W
Function: DC to AC conversion for standalone photovoltaic systems
Designed for: off-grid (standalone) operation with built-in safety features
How to use
Install the inverter in a dry, well-ventilated location following the manufacturer's installation guide. Connect the DC input to a compatible photovoltaic array or battery bank, ensuring correct polarity and secure connections. Connect the AC output to the intended load or distribution panel in accordance with local electrical regulations. Confirm the total continuous load does not exceed the 3500W rating and install protective devices (fuses, circuit breakers) where required. For final wiring and commissioning, engage a qualified installer or electrician.
Usage recommendations
Match inverter capacity to expected household or site loads and size the photovoltaic array and battery storage to meet daily energy requirements. Provide adequate ventilation and secure mounting, apply grounding and surge protection practices, and consult the QOLTEC user manual and applicable local electrical codes before connecting the system. For complex installations or persistent faults, contact a certified installer.

## FAQ

### How much does the Off-grid solar inverter QOLTEC 3500W 53864 cost, and is it available for purchase?

The price is 232.49 € (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 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. All transactions are 100% secure and encrypted.

### Can Off-grid solar inverter QOLTEC 3500W 53864 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/11419565/66062273_large.webp