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M Series Fixed Voltage Buck MPPT Solar Charge Controller
M12PA
12V
14.5A
180W
M12PB
12V
20A
300W
M24PA
24V
14.5A
300W
M24PB
24V
20A
600W
Key Features
- MPPT maximum power tracking technology, tracking efficiency >99.9%
- Supports simultaneous full-power charging and discharging
- Supports multiple battery types: Ternary (Li-ion), LiFePO4, Lead-acid, Gel
- Supports Li-ion and Lead-acid battery activation
- Supports charging current settings and full charge settings
- Supports temperature compensation function
- Supports multiple load working modes (Manual/Auto)
- Supports historical data storage
Communication
- RS485 communication (Standard Modbus protocol, adjustable baud rate)
- TTL communication (Standard Modbus protocol, adjustable baud rate)
- Bluetooth communication (optional expansion)
- Ethernet communication (optional expansion)
- Supports external 12V power supply
Applications
Technical Specifications Comparison
| Parameter | M12PA | M12PB | M24PA | M24PB |
|---|---|---|---|---|
| Platform | 12V Platform | 12V Platform | 24V Platform | 24V Platform |
| System Mode | Buck | Buck | Buck | Buck |
| Rated Charging Current | 14.5A | 20A | 14.5A | 20A |
| Max PV Input Current | 10A | 18A | 10A | 18A |
| Max Solar Panel Power | 180W | 300W | 300W | 600W |
| PV Open Circuit Voltage (Voc) | 16V~30V | ≤30V | 30V~56V | ≤56V |
| Recommended PV Vmp | 16V~24V | 16V~24V | 30V~42V | 24V~42V |
| Max System Withstand Voltage | 36V(±2%) | 36V(±2%) | 60V(±2%) | 63V(±2%) |
| MPPT Tracking Efficiency | >99.9% | >99.9% | >99.9% | >99.9% |
| MPPT Tracking Speed | <1ms | <1ms | <1ms | <1ms |
| Charging Conversion Efficiency | >96% | >96% | >96% | >96% |
| Rated Load Current | 10A | 20A | 10A | 20A |
| Static Power Consumption | ≤30mA | ≤30mA | ≤30mA | ≤30mA |
| Protection Rating | IP32 | IP32 | IP32 | IP32 |
| Operating Temperature | -35℃~65℃ | -35℃~65℃ | -35℃~65℃ | -35℃~65℃ |
| Cooling Method | Natural/Forced Air | Natural/Forced Air | Natural/Forced Air | Natural/Forced Air |
| Dimensions (L×W×H) | 78×150×29mm | 94.5×170×34mm | 78×150×29mm | 94.5×170×34mm |
| Weight | 0.36kg | 0.46kg | 0.36kg | 0.55kg |
| Communication Interface | RS485/TTL/BT(optional)/ETH(optional) | RS485/TTL/BT(optional)/ETH(optional) | RS485/TTL/BT(optional)/ETH(optional) | RS485/TTL/BT(optional)/ETH(optional) |
| LiFePO4 Battery | 4S | 4S | 7~8S | 8S |
| Ternary Li-ion Battery | 3~4S | 3~4S | 6~7S | 6~7S |
| Lead-acid/Gel Battery | 1S | 1S | 2S | 2S |
| External 12V Supply | <300mA | <150mA | <300mA | <150mA |
Protection Functions
PV over-voltage protection, PV reverse connection protection, PV short circuit protection, Night reverse charge protection, Input power limit protection, Over-temperature protection, Load short circuit protection, Load overload protection, Battery over-voltage/over-discharge protection, Battery reverse connection protection
📥 Product Manual Downloads
Product Features
99.9% MPPT Efficiency
Industry-leading MPPT maximum power tracking technology, tracking efficiency >99.9%, tracking speed 1ms, fast and accurate maximum power point tracking.
Multi-Battery Compatible
Supports Ternary (Li-ion), LiFePO4, Lead-acid, Gel batteries and more, independently configured via upper computer software.
Full-Power Charge/Discharge
Supports simultaneous full-power charging and discharging to meet different application requirements.
Multi-Protection
Complete protection mechanisms: PV over-voltage, PV reverse, PV short circuit, night reverse charge, load overload, load short circuit - ten-layer protection.
Multiple Communication
Supports RS485 (Modbus), TTL, Bluetooth (optional), Ethernet (optional) communication, supports external 12V power supply.
Smart Cooling
High-quality aluminum heat sink, forced air cooling, automatic derating at high temperatures to ensure reliable and efficient operation.
Typical Applications
Residential Solar Systems
Provides stable solar charging solutions for homes.
RV Solar Systems
Suitable for RV camping, providing reliable solar charging.
Solar Surveillance Systems
Provides stable power for security cameras with 24/7 monitoring.
Telecom Base Station Power
Stable power for communication equipment and sensor networks.
Agricultural Irrigation
Green power support for agricultural irrigation equipment.
Industrial Off-Grid Power
Independent power supply for remote industrial areas.
Want to Learn More?
Our technical team can provide professional product consultation and technical support. OEM/ODM customization services available.
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