# MPPT Solar Charge Controller QOLTEC 53662 with Temperature Sensor

**URL:** https://aio.lv/en/product--qoltec-53662--11491953
**Data updated:** 2026-02-15 12:41 (EET)
**Category:** Battery chargers
**Manufacturer:** QOLTEC
**Manufacturer code:** 53662
**EAN:** 5901878536620
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 90.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 74.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-53662--11491953

## 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 53662 with built-in temperature sensor. Designed to regulate charging from photovoltaic panels to batteries using maximum power point tracking (MPPT) for improved efficiency. Includes temperature compensation for accurate charging, protection functions and connections for PV, battery and load. Suitable for off-grid solar systems, battery maintenance and small renewable installations.

## Long description

The MPPT Solar Charge Controller QOLTEC 53662 with Temperature Sensor regulates power transfer from photovoltaic panels to batteries using maximum power point tracking (MPPT) to extract higher charging efficiency compared with simple PWM regulators. The unit integrates a temperature sensor for automatic temperature compensation of charging voltage, and provides dedicated terminals for PV input, battery output and load connection. It is intended for off-grid solar systems, battery maintenance and small renewable energy installations where controlled charging and protection features are required.
Advantages
The QOLTEC 53662 implements MPPT technology to improve energy harvest from solar panels under varying irradiance and temperature. Built-in temperature sensing enables automatic adjustment of charging parameters to match battery temperature, helping to maintain correct charge voltage and extend battery life. The device includes protection functions and standard connections for PV, battery and load, delivering a compact and practical solution for small-scale systems.
Suitable for
Off-grid solar systems for cabins, boats or remote equipment
Battery maintenance and charging of 12V/24V battery banks (system dependent)
Small renewable installations such as standalone PV arrays powering lights, pumps or electronics
Key specifications
MPPT charging algorithm for improved solar-to-battery conversion
Integrated temperature sensor for temperature-compensated charging
Terminals for photovoltaic panel input, battery output and load connection
Protection against common faults (overcharge, reverse polarity, short circuit — as implemented by the manufacturer)
Compact form factor suitable for small installations
How to use
Install the controller on a ventilated, dry surface near the battery bank and within reach of PV cable runs. Connect the battery first to ensure the controller recognises system voltage, then connect the photovoltaic panel to the PV terminals and finally attach the load to the load terminals. Position and connect the temperature sensor to the battery or near the battery terminals to enable temperature-compensated charging. Follow the manufacturer’s wiring diagrams and safety instructions included with the product when making electrical connections.
Usage recommendations
Verify system voltage compatibility before installation, route cables to minimise voltage drop, and ensure proper fusing on battery and PV circuits. Regularly inspect connections and clean PV panels to maintain performance. For specific battery types and charging profiles, consult the battery manufacturer and adjust controller settings accordingly where configurable.

## FAQ

### How much does the MPPT Solar Charge Controller QOLTEC 53662 cost, and is it available for purchase?

The price is 90.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 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 MPPT Solar Charge Controller QOLTEC 53662 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/11491953/66226078_large.webp