1. Introduction
The SRNE MPPT Solar Universal Charge Controller is designed to efficiently manage power flow from solar panels to batteries, ensuring optimal charging and discharge. Utilizing advanced Maximum Power Point Tracking (MPPT) technology, it maximizes energy harvesting from your solar array. This controller is suitable for both 12V and 24V systems and supports various battery types, including lead-acid and lithium batteries. Its robust design, including a metal outer shell and IP68 waterproof rating, ensures reliable operation in diverse environmental conditions.
Main Features:
- High response speed and tracking efficiency with MPPT technology, improving solar panel energy utilization.
- Compatibility with lead-acid and lithium batteries; operating parameters are remotely configurable.
- Features temperature compensation and multi-stage constant voltage charging for lead-acid batteries.
- Includes battery charge and discharge temperature protection and customizable settings.
- Infrared remote control for parameter setting and status monitoring.
- Comprehensive protections: battery/PV reverse electrode, LED short-circuit, open-circuit, and limited power.
- Durable metal outer shell with IP68 waterproof rating for harsh environments.
2. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your SRNE MPPT charge controller. Please follow these instructions carefully.
2.1 Installation Method
The controller should be mounted in a location that allows for adequate ventilation and is protected from direct sunlight and excessive heat. Ensure the mounting surface is stable and can support the weight of the controller.
Controller Dimensions (Overall / Mounting / Hole Diameter):
- MPL1210: 80x82x22.6mm / 66x75mm / φ3.5mm
- MPL2410: 114x88.3x24.5mm / 74x82.3mm / φ3.5mm
- MPL2415: 142x88.3x24.5mm / 102x82.3mm / φ3.5mm
- MPL2420: 155x114.4x34mm / 102x123mm / φ3.5mm
2.2 Electrical Wiring Diagrams
Follow the wiring sequence carefully to prevent damage to the controller and connected components. Always connect the load first, then the battery, and finally the solar panel.
A. Wiring Diagram for Controller with Built-in IoT Module:
- Connect the Load.
- Connect the Battery.
- Connect the Solar Panel.
Note: Controllers equipped with an antenna are IoT type.
B. Wiring Diagram for Controller with External IoT Module:
- Connect the External IoT Module.
- Connect the Load.
- Connect the Battery.
- Connect the Solar Panel.
Communication Line Interfaces:
- Red: VCC
- Black: GND
- Yellow: A/T
- White: B/R
3. Operating Instructions
3.1 Load Mode Settings
The controller supports different load operating modes, configurable via remote control:
- Light Control + Time Control Mode: Set the working time in the first period to "1 - 14". The controller will switch off the load after a preset period (maximum 15 hours) when no sunlight is detected.
- Normally On Mode: Set the working time in the first period to "15". The load will remain continuously on, providing 24-hour power.
- Charging Mode: Set the working time in the first period to "0". In this mode, the load does not operate; only the charging function is active. The controller automatically enters sleep mode at night (sleep current <1mA) to minimize system loss.
3.2 Indicator and Remote Control Status
The MPL series controllers feature three red indicators (PV, BAT, LOAD) to display operational status. The remote control also provides status feedback.
| Indicator | Status | Description | Remote Control System Status |
|---|---|---|---|
| PV indicator | Steady on | Solar panel voltage is higher than light control voltage | Idle |
| Off | Solar panel voltage is lower than light control voltage | Idle | |
| Double flash | Fully charged | Fully charging | |
| Slow flash | In charging | Charging | |
| Quick flash | BMS protection, or BAT overvoltage, or PV overvoltage, or over temperature (ambient temperature), or power/current limited charging | E-BMS, Battery overvoltage, PV panel overvoltage, Over temperature, Overcurrent | |
| BAT indicator | Steady on | Battery works properly | Idle |
| Off | Battery is not connected or lithium battery protection board over discharge protection | Discharging | |
| Quick flash | Battery over-discharge | Discharging | |
| LOAD indicator | Steady on | Load is turned on | Idle |
| Off | Load is turned off | Idle | |
| Quick flash | Load is short circuited | Short circuit |
3.3 Remote Control Operation
The controller supports infrared remote control for setting operating parameters and checking system status. For models with IoT or Bluetooth modules (MPL-UL, MPL-NB, MPL-GP, MPL-BT, MPL-C, MPL-CT), additional remote monitoring and control capabilities may be available via dedicated applications or interfaces. Refer to the specific module's documentation for detailed instructions on advanced remote control features.
4. Maintenance
To ensure the longevity and optimal performance of your SRNE MPPT charge controller, regular maintenance is recommended:
- Visual Inspection: Periodically check the controller for any signs of physical damage, corrosion, or loose connections.
- Cleanliness: Keep the controller's exterior clean and free from dust and debris. Although it has an IP68 rating, ensuring clear surfaces helps with heat dissipation.
- Connections: Verify that all wiring connections (solar panel, battery, load) are secure and free from corrosion. Loose connections can lead to power loss or overheating.
- Ventilation: Ensure that the area around the controller is clear and allows for proper airflow to prevent overheating.
- Battery Health: Monitor your battery's health and voltage levels regularly. Ensure the battery type settings in the controller match your installed battery.
5. Troubleshooting
Use the indicator status table (Figure 4) to diagnose common issues. If a problem persists, consult the full product manual or contact customer support.
- No PV Indicator Light: If the PV indicator is off, check if the solar panel voltage is lower than the light control voltage, or if the solar panel is not connected properly. Ensure there is sufficient sunlight.
- PV Indicator Quick Flash: This indicates a protection event. Check for BMS protection, battery overvoltage, PV overvoltage, over temperature, or power/current limited charging. Address the underlying cause (e.g., reduce load, check battery voltage).
- BAT Indicator Off: This suggests the battery is not connected or the lithium battery protection board has triggered over-discharge protection. Verify battery connections and charge level.
- BAT Indicator Quick Flash: Indicates battery over-discharge. Charge the battery immediately.
- LOAD Indicator Quick Flash: This signifies a load short circuit. Disconnect the load and inspect for any short circuits in the wiring or the load device itself.
- Controller Not Responding to Remote: Ensure the remote control has fresh batteries and is pointed directly at the controller's IR receiver. Check for any obstructions.
6. Specifications
Detailed technical parameters for the SRNE MPPT Solar Charge Controllers:
| Item | MPL1210 | MPL2410 | MPL2415 | MPL2420 | Adjustable | Default |
|---|---|---|---|---|---|---|
| Controller type | -R: infrared remote control; -W: wireless remote control | |||||
| System voltage | 12V/24V | |||||
| Static power consumption | -R: <5mA/12V, <6mA/24V -W: <20mA/12V |
-R: <6mA/24V -W: <18mA/24V |
-R: <4mA/24V -W: <13mA/24V |
-R: <30mA/12V, <25mA/24V -W: <15mA/12V, <25mA/24V |
||
| Sleep power consumption | ≤1mA | |||||
| Load Maximum current | 10A | 10A | 15A | 20A | ||
| Load working period | Normally On mode/9-Period + Pre-dawn lighting | |||||
| Period adjustment range | 1min / 10min | |||||
| Maximum solar input power | 130W/12V, 260W/24V | 200W/12V, 400W/24V | 200W/12V, 400W/24V | 260W/12V, 520W/24V | ||
| Maximum charge current | 10A | 10A | 15A | 20A | ||
| Maximum solar input voltage | ≤50V | ≤100V | ||||
| MPPT Tracking efficiency | ≥99% | |||||
| Conversion efficiency | 85%-98% | |||||
| Over voltage | PB:16.0V; LI:charging voltage + 2V; ±2/24V system | |||||
| Limited charge voltage | PB:15.5V; LI:charging voltage + 1V; ±2/24V system | |||||
| Equalizing charge voltage | PB:14.6V; LI:without balanced charge; ±2/24V system | |||||
| Equalizing charge interval | 30 days | |||||
| Boost charge voltage (lead-acid) | 8.5V - 17.00V settable; ±2/24V system | ✓ | 14.4V | |||
| Float charge voltage (lead-acid) | 8.5V - 17.00V settable; ±2/24V system | ✓ | 13.8V | |||
| Charge return voltage (lithium) | 8.5V - 17.00V settable; ±2/24V system | ✓ | ||||
| Over discharge voltage | 8.5V - 17.00V settable; ±2/24V system | ✓ | 11.0V | |||
| Over discharge return voltage | 8.5V - 17.00V settable; ±2/24V system | ✓ | 12.5V | |||
| Light control voltage | 3V - 11V; ±2/24V system | ✓ | 5V | |||
| Temperature compensation coefficient | PB: -3.0mV/°C/2V; LI:lithium battery no compensation | |||||
| Light control delay | 5s-60s/2min-60min | ✓ | 10s | |||
| High temperature charge | 40°C - 90°C | ✓ | 65°C | |||
| Low temperature charge | 0°C - 35°C | ✓ | -35°C | |||
| Operating temperature | -35°C - +65°C | |||||
| IP rating | IP68 | |||||
| Protections | Battery reverse polarity protection, solar panel reverse polarity protection, solar panel over-voltage protection, lithium battery overcharge and over-discharge protection, lithium battery BMS overcharge protection, load open circuit and short circuit protection. | |||||
| Weight | 260g | 490g | 510g | 770g | ||
Performance Curves:
7. User Tips
- Remote Control for Customization: Utilize the infrared remote control to fine-tune operating parameters, such as load modes and charging voltages, to match your specific system requirements and battery type. This allows for greater flexibility than default settings.
- Battery Type Selection: Always ensure the controller's battery type setting accurately reflects the type of battery connected (e.g., lead-acid, lithium) to prevent improper charging and potential damage.
- Wiring Sequence: Adhere strictly to the recommended wiring sequence (Load > Battery > Solar Panel) during installation and disconnection to protect the controller from surges.
- Monitor Indicators: Regularly check the PV, BAT, and LOAD indicators for quick status checks and early detection of potential issues or protection activations.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase. Ensure all installation and operation guidelines are followed to maintain warranty validity.