1. Introducció
This manual provides instructions for the installation, operation, and maintenance of your Y&H BL917 Solar Charge Controller. This device is designed to manage power flow from your solar panels to your battery bank, ensuring efficient charging and protecting your batteries from overcharge and over-discharge.
2. Instruccions de seguretat
Please read and understand all safety instructions before installing or operating the controller.
- Ensure all connections are correct and secure before operation. Incorrect wiring can cause damage to the controller, battery, or solar panels.
- No intenteu desmuntar ni reparar el controlador vosaltres mateixos. Poseu-vos en contacte amb personal qualificat per al servei tècnic.
- Install the controller in a well-ventilated, dry environment, away from direct sunlight, high temperatures, and flammable materials.
- Connect the battery to the controller first, then the solar panel, and finally the load. Disconnect in reverse order: load, then solar panel, then battery.
- Feu servir cables de calibre adequat per a totes les connexions per evitar el sobreescalfament i garantir una transferència d'energia eficient.
3. Producte acabatview
3.1 Característiques clau
- Àmplia compatibilitat: Automatically detects 12V/24V systems and supports open, AGM, and gel lead-acid batteries. Features dual 5V/2.5A USB ports for charging external devices.
- Smart MPPT Technology: Utilizes an advanced MPPT algorithm for high efficiency, continuous detection, and bidirectional tracking, optimizing power harvest even in varying conditions.
- Functional LCD Display: Large LCD for clear display of system parameters and adjustable charge/discharge settings. Includes a programmable output timer for convenience.
- Protecció fiable: Integrated protection against over-heating, over-current, short-circuit, open-circuit, and reverse connection. The system automatically recovers after fault resolution without damage.
- Fàcil d'utilitzar: Comprehensive protection system with automatic recovery. Suitable for various applications including home appliances, garden street lights, and industrial use.
3.2 Components
The Y&H BL917 Solar Charge Controller features an intuitive design for ease of use. Below is an image highlighting its main components.

Davant view of the Y&H BL917 Solar Charge Controller, showing the LCD screen, control buttons, and dual USB ports.
4. Configuració
4.1 Diagrama de connexió
Follow the steps below to correctly connect your solar charge controller to your battery, solar panels, and DC loads. Always connect in the specified order to prevent damage.

A detailed diagram illustrating the connection sequence for the solar charge controller. It shows the battery connected first, followed by the solar panel, and then optional DC loads and an inverter for AC loads.
- Connecteu la bateria: Connect the battery to the controller's battery terminals (labeled '1' in the diagram). Ensure correct polarity (+ to + and - to -). The controller will automatically detect 12V or 24V system voltage.
- Connecteu el panell solar: Connect the solar panel to the controller's solar panel terminals (labeled '2' in the diagram). Ensure correct polarity.
- Connect DC Loads: Connect your DC loads (e.g., LED lights) to the controller's load terminals (labeled '3' in the diagram).
- Connect AC Loads (Optional): For AC loads, connect an inverter to the battery terminals (not directly to the load terminals of the controller).
4.2 Compatibilitat de la bateria
The Y&H BL917 controller is designed to work with various battery types.

The Y&H BL917 Solar Charge Controller shown alongside illustrations of GEL, FLOODED, and LITHIUM battery types, indicating compatibility.
This controller is suitable for all kinds of lead-acid batteries, including open, sealed, and gel types. If charging a lithium battery, ensure you are familiar with its characteristics and set the charging parameters accordingly through the controller's settings.
5. Instruccions de funcionament
Pantalla LCD i botons 5.1
The integrated LCD displays real-time system parameters such as input/output current, voltage, and temperature. Use the control buttons below the screen to navigate menus and adjust settings.

Close-up of the Y&H BL917 Solar Charge Controller's LCD screen, showing input/output current, voltage, i lectures de temperatura.
5.2 Modes de treball de càrrega
The controller supports different load working modes for flexible power management of your DC loads.

An image detailing the three load working modes available on the Y&H BL917 Solar Charge Controller: Manual Mode (24H), Solar Light Control Mode (Sunset-Sunrise), and Solar Light Time Control.
- Mode manual (24 h): The load output is continuously on, 24 hours a day.
- Mode de control de la llum solar (posta de sol-sortida del sol): The load output automatically turns on at sunset and turns off at sunrise.
- Control del temps de la llum solar: The load output turns on at sunset and remains on for a user-programmable duration.
5.3 Configuració dels paràmetres
The charge and discharge parameters can be adjusted via the LCD display using the control buttons. This allows customization based on your specific battery type and system requirements. Refer to the specifications table for default values and adjustment ranges.
5.4 Wireless Monitoring (Optional)
The Y&H BL917 controller supports wireless monitoring and control via Bluetooth using a compatible smartphone application. This allows you to view real-time system data and adjust settings remotely.

A smartphone displaying a monitoring application connected via Bluetooth to the Y&H BL917 Solar Charge Controller, showing real-time system data.
6. Manteniment
Un manteniment regular garanteix la longevitat i el rendiment òptim del vostre controlador de càrrega solar.
- Comproveu les connexions: Regularly inspect all wiring connections for tightness and signs of corrosion. Loose or corroded connections can lead to power loss or system malfunction.
- Mantenir net: Keep the controller clean and free from dust, dirt, and debris. Use a dry cloth to wipe the exterior.
- Assegureu-vos de la ventilació: Verify that there is adequate airflow around the controller to prevent overheating, especially during peak operation.
- Inspecció de la bateria: Periodically inspect battery terminals for corrosion and clean them if necessary.
7. Solució De Problemes
Aquesta secció ofereix solucions a problemes comuns que podeu trobar.
| Problema | Causa possible | Solució |
|---|---|---|
| Sense pantalla a la pantalla LCD | Battery not connected or low battery voltage | Check battery connections and ensure correct polarity. Verify battery voltage is above the minimum operating threshold. |
| La bateria no es carrega | Solar panel not connected, insufficient sunlight, or reverse polarity | Check solar panel connections and polarity. Ensure panels are receiving adequate sunlight. Clean panels if dirty. |
| La càrrega no funciona | Load disconnected, low battery voltage, or incorrect load mode setting | Check load connections. Verify battery voltage is sufficient. Adjust load working mode settings on the controller. |
| Codi d'error a la pantalla | System fault (e.g., over-current, short-circuit, over-temperature) | Identify the specific error code (if provided by the controller). Disconnect all components, wait a few minutes, and reconnect in the correct sequence. If the error persists, contact support. |
7.1 Característiques de protecció
The controller is equipped with multiple protection mechanisms to safeguard your system.

An image highlighting the security protection features of the Y&H BL917 Solar Charge Controller, including short-circuit protection, over-heating protection, reverse connection protection, and over-current protection.
- Protecció contra curtcircuits: Prevents damage from short circuits in the load or battery.
- Protecció contra sobreescalfament: Shuts down or reduces power if the internal temperature exceeds safe limits.
- Protecció de connexió inversa: Protects the controller and battery from damage due to incorrect polarity connections.
- Protecció contra sobreintensitat: Prevents excessive current flow to the load.
- Protecció contra sobrecàrrega/sobredescàrrega: Safeguards the battery from being charged or discharged beyond its safe limits.
8. Especificacions
Detailed technical specifications for the Y&H BL917 Solar Charge Controller.
| Característica | Valor |
|---|---|
| Volum del sistematage | 12V / 24V Auto |
| Corrent de càrrega màxima | 30A (for BL917-30A-SA variant) |
| Corrent de descàrrega màxima | 15A (for 30A variant) |
| Sortida USB | Dual 5V/2A Max |
| Tipus de visualització | LCD |
| Tipus de bateria compatibles | Lead-acid (Open, AGM, Gel), Lithium (user-set parameters) |
| Max Solar Input (12V system) | <40V (18V solar panel) |
| Max Solar Input (24V system) | <40V (36V solar panel) |
| Temperatura de funcionament | -10 °C a +60 °C |
| Dimensions | 13 x 7 x 3 cm |
| Pes | 160 g |
| Número de model | BL917-30A-SA |
| UPC | 704334854895 |

Diagram showing the dimensions of the Y&H BL917 Solar Charge Controller (13cm length, 7cm width, 3cm height) and a table summarizing model features like USB output, auto 12V/24V detection, and MOS charging mode.
9. Garantia i Suport
For warranty information or technical support regarding your Y&H BL917 Solar Charge Controller, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.





