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header-product Qoltec 20A MPPT Solar Charge Controller 12V 24V with Temperature Sensor LCD 2 x USB GEL LiFePO4 Support
39.99 €
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AiO.lv Home & Renovation Green Energy Solar Panel Accessories QOLTEC

Qoltec 20A MPPT Solar Charge Controller 12V 24V with Temperature Sensor LCD 2 x USB GEL LiFePO4 Support

Qoltec 20A MPPT Solar Charge Controller 12V/24V Photo 1
Qoltec 20A MPPT Solar Charge Controller 12V/24V Photo 1
Qoltec 20A MPPT Solar Charge Controller 12V 24V with Temperature Sensor LCD 2 x USB GEL LiFePO4 Support

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Qoltec 20A MPPT Solar Charge Controller 12V 24V with Temperature Sensor LCD 2 x USB GEL LiFePO4 Support

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Short description

Qoltec 20A MPPT solar charge controller designed for 12V and 24V photovoltaic systems. Features advanced MPPT technology, temperature sensor for optimal charging, clear LCD display, dual USB ports, and support for GEL and LiFePO4 batteries. Ideal for off-grid solar power installations, ensuring efficient energy harvesting and reliable battery management.
Available for order: 200 pcs.
Warranty: 2 Years
SKU: 12707640
Manufacturer: QOLTEC
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1.99 €

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Product information

Description

The Qoltec 20A MPPT Solar Charge Controller 12V 24V with Temperature Sensor LCD 2 x USB GEL LiFePO4 Support is an advanced device designed to manage energy flow from photovoltaic panels into your battery bank efficiently. Utilizing Maximum Power Point Tracking technology, this controller ensures your system extracts the highest possible energy yield from solar panels under varying weather and temperature conditions. It supports both 12V and 24V systems and is compatible with multiple battery chemistries, including GEL and LiFePO4, making it a versatile component for modern off-grid installations.

Advantages

This solar charge controller maximizes energy harvest by continuously tracking the optimal operating point of the solar panels, significantly outperforming traditional PWM controllers. The included external temperature sensor allows for precise temperature compensation, protecting your battery lifespan and ensuring safe charging parameters in changing environments. The integrated LCD screen provides real-time operational data and system status visibility at a glance. Additionally, the dual USB ports offer convenient direct charging for small electronic devices without requiring extra adapters.

Suitable for

  • Off-grid solar power installations in cabins, sheds, and tiny homes
  • Small to medium photovoltaic setups utilizing 12V or 24V battery banks
  • Charging GEL and LiFePO4 battery types safely and efficiently
  • Powering USB-compatible devices directly from the solar system

When it may not be suitable

This device is not designed for grid-tied solar power systems that feed electricity back into the utility grid. It may also be insufficient for large-scale industrial photovoltaic arrays that exceed a 20A current rating.

Key specifications

  • Rated current: 20A
  • System voltage: 12V / 24V auto-recognition
  • Supported battery types: GEL, LiFePO4
  • Display type: LCD screen
  • Outputs: 2 x USB ports
  • Sensor: External temperature sensor included
  • Technology: MPPT (Maximum Power Point Tracking)

How to use

Begin installation by connecting the battery bank to the charge controller first, ensuring the correct polarity is observed. Next, connect the temperature sensor to monitor thermal conditions accurately. Proceed by connecting the photovoltaic panels to the designated solar terminals on the controller. The unit will automatically detect the system voltage of either 12V or 24V. Use the integrated LCD interface to monitor system performance, configure battery settings according to your specific battery chemistry such as GEL or LiFePO4, and utilize the USB ports for direct device charging as needed.

What to consider before purchase

  • Verify that your total solar panel current output does not exceed the 20A rating of the controller
  • Check that your battery bank voltage matches the supported 12V or 24V system requirements
  • Confirm compatibility with your specific battery type, such as GEL or LiFePO4
  • Assess your installation environment to ensure space for the unit and proper routing for the external temperature sensor
Usage recommendations: Mount the solar charge controller in a well-ventilated, dry indoor location away from direct sunlight and moisture to ensure optimal thermal performance and longevity. Regularly check wiring connections and monitor the LCD display to maintain peak system efficiency.

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Product comparison

The Qoltec 20A MPPT solar charge controller is compared against several alternative devices: MPPT Solar Charge Controller QOLTEC 80A, Volt MPPT Solar Charge Controller 20A with Bluetooth, Victron Energy BlueSolar PWM-LCD&USB Charge Controller 12V 24V 20A SCC010020050, Victron Energy BlueSolar MPPT 100/15 Solar Charge Controller, and Solar charge controller Victron SmartSolar MPPT 100/20 48V 20A. All these devices are designed for off-grid solar systems and battery regulation, but they differ in current rating, system voltage support, charging technologies, and wireless connectivity.

⚙️ The specifications comparison table below outlines parameters such as maximum charging current, supported system voltage, charging technology type (MPPT or PWM), Bluetooth connectivity, and USB ports for each reviewed device.

ParameterQoltec 20A MPPTMPPT QOLTEC 80AVolt 20A MPPT with BluetoothVictron BlueSolar PWM-LCD&USBVictron BlueSolar MPPT 100/15Victron SmartSolar MPPT 100/20Practical significance
Maximum charging current20A80A20A20A15A20ADetermines the maximum power of connected solar panels and battery charging speed.
Supported system voltage12V, 24V12V, 24V, 36V, 48VNot specified12V, 24VNot specified48V (for SmartSolar 100/20)Limits compatibility with the operating voltage of the solar power system.
Charging technologyMPPTMPPTMPPTPWMMPPTMPPTMPPT technology harvests energy from panels more efficiently than PWM.
Wireless connectivityNoBluetooth (with app support)BluetoothNoNoBuilt-in Bluetooth (in SmartSolar versions)Allows for convenient remote monitoring of system performance via a smartphone.
Additional interfaces2 x USBLCD displayNot specifiedLCD display and USBNot specifiedNot specifiedUSB ports are useful for directly charging mobile gadgets in off-grid setups.

◎ The suitability table below evaluates different use cases to help determine which product best fits specific user needs and installation requirements.

Use caseRecommended productWhy
Basic off-grid 12V or 24V system with modern battery supportQoltec 20A MPPTProvides efficient GEL and LiFePO4 battery charging, features a temperature sensor, and includes USB ports for small installations.
Powerful residential or mobile solar setups up to 80AMPPT Solar Charge Controller QOLTEC 80AOffers a higher current rating and support for systems up to 48V for larger solar power stations.
Remote monitoring of charging parameters via smartphoneVolt MPPT Solar Charge Controller 20A with BluetoothEquipped with an integrated Bluetooth module for quick configuration and performance tracking through a mobile app.
Simple budget-friendly cabins and small off-grid setupsVictron Energy BlueSolar PWM-LCD&USB Charge Controller 12V 24V 20A SCC010020050Uses basic PWM technology at 20A with an LCD screen and USB for simple, affordable system control.
Compact systems with strict demands for component stabilityVictron Energy BlueSolar MPPT 100/15 Solar Charge ControllerProvides reliable MPPT regulation for small solar panels with a 15A current limit.
Systems requiring 48V voltage and advanced wireless controlSolar charge controller Victron SmartSolar MPPT 100/20 48V 20ASpecifically engineered for 48V grid setups with a 20A current and SmartSolar technology.
The Qoltec 20A MPPT controller stands out with an optimal balance for 12V and 24V systems, GEL and LiFePO4 battery support, an included temperature sensor, and USB ports. This model is best suited for owners of small off-grid solar installations who need efficient MPPT technology without paying extra for heavy-duty industrial ratings or built-in Bluetooth connectivity.
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Customer questions

FAQ

How much does the Qoltec 20A MPPT Solar Charge Controller 12V/24V cost, and is it available for purchase?

The price is 39.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 200 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 06.11.2026 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. All transactions are 100% secure and encrypted.

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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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