# Solar charge controller QOLTEC MPPT 50A 12V/24V with LCD, model 53664

**URL:** https://aio.lv/en/product--qoltec-53664--11643027
**Data updated:** 2026-02-15 18:51 (EET)
**Category:** Battery chargers
**Manufacturer:** QOLTEC
**Manufacturer code:** 53664
**EAN:** 5901878536644
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 101.99 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 84.29 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-53664--11643027

## 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

MPPT solar charge controller QOLTEC 50A 12V/24V (model 53664) with LCD display. Designed to regulate charging from photovoltaic panels to 12V or 24V battery systems, it maximizes energy harvest via MPPT tracking and provides clear status and settings on the LCD. Suitable for small to medium off-grid systems, leisure vehicles, and backup power setups, offering stable charging and battery protection.

## Long description

Solar charge controller QOLTEC MPPT 50A 12V/24V with LCD, model 53664 is a maximum power point tracking regulator designed to manage charging from photovoltaic panels to 12V or 24V battery banks. The controller monitors panel output and battery condition, optimizes power transfer with MPPT algorithms, and provides a clear LCD for voltage, current and charging mode information. Intended for small to medium off-grid systems, recreational vehicles and backup power installations, it supports safe, efficient charging and basic battery protection functions.
Advantages
The MPPT algorithm increases energy harvest compared with PWM controllers by continuously tracking the solar array’s optimal operating point, improving charge current under varying irradiance and temperature. The integrated LCD displays key parameters and status for straightforward monitoring and configuration. Automatic recognition of 12V or 24V battery systems simplifies installation, while built-in protections against overcharge, reverse connection and overload help preserve battery life and system reliability.
Suitable for
Small off-grid solar systems for cabins and sheds
Leisure vehicles and camper vans
Residential backup battery systems and emergency power
Boat electrical systems with 12V/24V batteries
Distributed photovoltaic installations up to the controller’s rated current
Key specifications
Maximum charging current: 50 A
Compatible battery voltages: 12 V and 24 V (auto-detection)
MPPT tracking for increased energy conversion efficiency
LCD display providing voltage, current, charging mode and status indications
Protection features: overcharge protection, reverse polarity protection, overload protection, short-circuit protection
Operating temperature range suitable for typical outdoor/indoor installations
How to use
Install the controller on a stable, ventilated surface close to the battery bank and away from direct heat sources. Connect the battery first, observing correct polarity, then connect the photovoltaic panel array. The controller will auto-detect the battery voltage (12V or 24V) and begin MPPT regulation. Use the LCD menu to view real-time voltage and current readings, change charging parameters where applicable, and review fault indicators. Regularly inspect wiring and connections for corrosion or looseness to maintain reliable operation.
Usage recommendations
To maximize system performance and battery life, size the solar array and cable cross-sections so that the controller operates within its 50 A rating and voltage limits. Place the controller in a ventilated location free from direct moisture exposure; for installations in harsh environments consider additional enclosure protection. Follow battery manufacturer guidelines for charging voltages and temperature compensation when adjusting settings via the LCD.

## FAQ

### How much does the QOLTEC MPPT solar charge controller 50A 12V/24V cost, and is it available for purchase?

The price is 101.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 63 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 QOLTEC MPPT solar charge controller 50A 12V/24V 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/11643027/66891076_large.webp