1. Nhanganyaya
The HQST 20 Amp MPPT Solar Charge Controller is designed to efficiently manage power flow from your solar panels to your battery bank. Utilizing advanced Maximum Power Point Tracking (MPPT) technology, it ensures high tracking efficiency and peak conversion efficiency, maximizing the energy harvest from your solar array. This controller automatically detects 12V or 24V DC system voltages and is compatible with various battery types, including sealed, vented, colloidal, and lithium batteries.
It incorporates multiple electronic protections to safeguard your system against common faults, ensuring reliable and safe operation. The compact design and efficient heat dissipation further enhance its performance and longevity.
2. Safety Information
Ndokumbira uverenge mirairo yese uye yambiro nekungwarira usati waisa uye kushanda. Kutadza kutevedzera mirairo iyi kunogona kukonzera kuvhunduka kwemagetsi, moto, kana kukuvara zvakanyanya.
- Gara uchibatanidza bhatiri nechaji yekuchaja kutanga, wozotevera solar panel, uye pakupedzisira mutoro. Bvisa bhatiri nenzira yekudzokera shure.
- Ensure all wiring is correctly polarized and securely connected to prevent short circuits.
- Use appropriate circuit breakers or fuses for all connections.
- Do not disassemble or attempt to repair the controller. Refer to qualified service personnel.
- Isa chinodzora moto munzvimbo ine mhepo inofefetera zvakanaka, kure nezvinhu zvinobvira moto uye zuva rakananga.
- Wear appropriate personal protective equipment (PPE) when working with batteries and electrical systems.

Figure 2.1: The controller offers comprehensive protection against various electrical faults.
3. Chigadzirwa Pamusoroview
The HQST 20 Amp MPPT Solar Charge Controller is a robust device designed for optimal solar power management. Key features include:
- Kunyatso Shandura: Up to 99.9% tracking efficiency and 98% peak conversion efficiency.
- Otomatiki Voltage Kuonekwa: Auto-detects 12V or 24V DC system voltages.
- Zvakawanda-stage Kuchaja: Zvimiro zvemasekondi maviritage charging (quick, holding, boost, float, and equalization) for optimal battery health.
- Battery Kuenderana: Supports sealed, vented, colloidal, and lithium batteries. User mode allows custom charging parameters.
- Dziviriro Yepamusoro: Includes overcharging, over current, overload, overheat, short circuit, reverse current, and reverse polarity protection.
- Efficient Heat Dissipation: Die-cast aluminum heat sink minimizes power loss from heat.
- Chiratidziro cheLCD: Provides real-time system operating information and error codes.

Figure 3.1: HQST 20 Amp MPPT Solar Charge Controller with Remote Meter.

Figure 3.2: Comprehensive functional design with labeled components.
4. Setup
Follow these steps for proper installation of your HQST MPPT Solar Charge Controller:
- Kukwidza: Choose a dry, well-ventilated location away from direct sunlight and heat sources. Ensure adequate space around the controller for air circulation. The controller dimensions are approximately 5.91" x 2.42" x 4.16" (L x W x H).
- Battery Connection: Connect the battery cables to the battery terminals on the charge controller. Ensure correct polarity (positive to positive, negative to negative). This connection must be made first.
- Kubatanidza Solar Panel: Connect the solar panel cables to the solar panel terminals on the charge controller. Ensure correct polarity.
- Kubatanidza Mutoro (Sarudzo): If using a DC load directly from the controller, connect the load cables to the load terminals. Ensure correct polarity.
- Tembiricha Sensor (Zvichida): Connect the external temperature sensor to the designated interface. This allows for temperature compensation of battery charging voltage.
- Remote Meter (Optional): Connect the remote meter (RM-6) to the communication interface for external display and control.

Figure 4.1: Typical wiring diagram for the solar charge controller system.
Note: The solar panel, battery, adapter kit, tray cables, DC load, and power inverter are not included with the charge controller.
5. Kushanda
Once installed, the controller will automatically detect the system voltage (12V or 24V). The LCD display provides real-time information about your system's performance.
5.1. Sarudzo yeRudzi rweBhatiri
The controller is compatible with various battery types. To select or customize the battery type:
- Access the settings menu via the operation keys on the controller or the remote meter.
- Navigate to the battery type setting.
- Select from pre-set options (Sealed, Vented, Colloidal, Lithium) or enter 'User' mode to set custom charging parameters.

Figure 5.1: Compatible battery types for the charge controller.
5.2. Kuchaja Stages
The controller employs a 5-stage-charging algorithm yekugadzirisa hupenyu hwebhatiri uye mashandiro aro:
- Quick Charge: Initial bulk charging phase.
- Holding Charge: Absorption phase, maintaining a constant voltage.
- Boost Charge: Raises voltage to ensure full charge.
- Chipo Chekuyerera: Maintains battery at a full state of charge.
- Equalization (for lead-acid batteries only): Periodically overcharges to balance cell voltages.

Mufananidzo 5.2: Mufananidzo we4-stage kuchaja process.
6. Kuchengeta
Kugara kugadziridza kunovimbisa hupenyu hurefu uye kuita kwakaringana kweako solar charge controller.
- Utsanana: Chengetedza mutongi akachena uye asina guruva nemarara. Shandisa jira rakaoma pakuchenesa.
- Connections: Periodically check all wiring connections for tightness and corrosion. Loose connections can cause overheating and poor performance.
- Kufefetedza Iva nechokwadi chekuti maburi emhepo haana kuvharwa kuti kupisa kupere zvakanaka.
- Kuongorora Bhatiri: Regularly inspect your batteries for any signs of damage, swelling, or leakage. Follow battery manufacturer's maintenance guidelines.
7. Kugadzirisa matambudziko
This section addresses common issues you might encounter with your HQST MPPT Solar Charge Controller.
| Dambudziko | Zvinogona Kukonzera | Solution |
|---|---|---|
| Hapana kuratidzwa/kudzimwa kwemagetsi | Bhatiri harina kubatana kana kuti vhoriyamu yakadereratage; Reverse polarity. | Tarisa kubatanidza kwebhatiri uye voltage. Ensure correct polarity. Charge battery if voltage yakaderera. |
| Hapana kuchaja kubva pa solar panel | Solar panel not connected; Insufficient sunlight; Solar panel fault; Reverse polarity. | Check solar panel connections and polarity. Ensure adequate sunlight. Test solar panel output. |
| Bhatiri harina kuzara zvakakwana | Incorrect battery type setting; Insufficient solar input; Battery degradation. | Verify battery type setting. Increase solar panel capacity or improve sun exposure. Consider battery replacement. |
| Overcharge/Over-discharge protection active | Bhatiri voltage outside safe limits. | The controller's protection features are working. Check battery health and system load. |
| Kodhi yezvikanganiso inoratidzwa | Specific system kukanganisa. | Refer to the detailed error code list in the full user manual (PDF) for specific troubleshooting steps. |
8. Zvinotsanangurwa
| Feature | Detail |
|---|---|
| Brand | HQST |
| Model | 20 Amp MPPT Solar Charge Controller |
| UPC | 810009714170 |
| Product Dimensions | 5.91 x 2.42 x 4.16 inches |
| Item Weight | 1.63 makirogiramu |
| Voltage | 12V/24V (Auto-detect) |
| Material | Aluminium |
| Display Type | LCD |
| Tracking Kubudirira | Kusvika 99.9% |
| Kushandura Kubudirira | Peak 98% |
9. Warranty & Tsigiro
The HQST 20 Amp MPPT Solar Charge Controller typically comes with a 3-year warranty from the manufacturer, covering defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
For technical support, warranty service, or further inquiries, please contact HQST customer service through their official website or the retailer where the product was purchased. Provide your product model number and a detailed description of the issue for faster assistance.
For the most detailed information, including specific error codes and advanced settings, please refer to the official User Manual PDF available for download from the HQST website or the product's Amazon listing page.





