M Series Variable Voltage Buck MPPT Solar Charge Controller

M24HA

12V/24V

10A

180W/300W

M24HB

12V/24V

20A

300W/600W

M24HC

12V/24V

30A

420W/820W

M48HC

24V/36V/48V

30A

820W~1440W

Key Features

  • MPPT maximum power point tracking technology, tracking efficiency >99%
  • 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 parallel charging (M24HC/M48HC)
  • Supports multiple load working modes (Manual/Auto)
  • Supports capacitive and inductive load startup
  • Supports historical data storage

Communication

  • RS485 communication (Standard Modbus protocol, adjustable baud rate)
  • TTL communication (Standard Modbus protocol, adjustable baud rate)
  • Bluetooth communication (external optional)
  • Ethernet communication (external optional)
  • Supports external 12V power supply

Applications

Residential Solar, RV Systems, Surveillance, Telecom Base, Off-Grid Power, Agricultural Irrigation, Addressing the pain point of low charging efficiency for RVs in shaded environments, SUNOPEN MPPT employs an ultra-fast MPPT tracking algorithm, which can improve conversion efficiency by 30% even under drastic changes in lighting conditions.
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Technical Specifications Comparison

Specification M24HA M24HB M24HC M48HC
Compatible Platforms 12V / 24V 12V / 24V 12V / 24V 24V / 36V / 48V
System Mode Buck Buck Buck Buck
Rated Charging Current 12.5A 20A 30A 30A
Max PV Input Current 10A 18A 28A 28A
12V Platform Max Power 180W 300W 420W -
24V Platform Max Power 300W 600W 820W 820W
36V Platform Max Power - - - 1080W
48V Platform Max Power - - - 1440W
Max PV Open Circuit Voltage (Voc) 56V 56V 90V 90V
System Max Withstand Voltage 60V(ยฑ2%) 63V(ยฑ2%) 100V(ยฑ2%) 100V(ยฑ2%)
MPPT Tracking Efficiency >99.9% >99.9% >99% >99%
MPPT Tracking Speed <1ms <1ms <1ms <1ms
Charging Conversion Efficiency >96% >96% 93%~98% 93%~98%
Rated Load Current 10A 20A 30A 25A
Standby Power โ‰ค30mA โ‰ค30mA โ‰ค50mA โ‰ค50mA
Protection Level IP32 IP32 IP32 IP32
Operating Temperature -35โ„ƒ~65โ„ƒ -35โ„ƒ~65โ„ƒ -35โ„ƒ~65โ„ƒ -35โ„ƒ~65โ„ƒ
Cooling Method Natural/Forced Air Natural/Forced Air Natural/Speed-controlled Fan Natural/Speed-controlled Fan
Dimensions (Lร—Wร—H) 78ร—150ร—29mm 94.5ร—170ร—34mm 109ร—190ร—40mm 109ร—190ร—40mm
Weight 0.36kg 0.55kg 0.82kg 0.82kg
Communication Interfaces RS485/TTL/Bluetooth/Ethernet RS485/TTL/Bluetooth/Ethernet RS485/TTL/Bluetooth/Ethernet RS485/TTL/Bluetooth/Ethernet
LiFePO4 Battery 4S/8S 4S/8S 4~8S 7~16S
Ternary Li-ion Battery 3S/6S 3S/6S 3~8S 6~14S
Lead-acid/Gel Battery 1S/2S 1S/2S 1~2S 2~4S
Parallel Charging Support - - โœ“ โœ“

Protection Functions

PV over-voltage, PV reverse connection, PV short circuit, Night reverse charging, Input power limiting, Over-temperature, Load short circuit, Load overload, Battery over-voltage/over-discharge, Battery reverse connection protection

๐Ÿ“ฅ Product Manual Downloads

M24HA

V1.1 Version

Download Manual

M24HB

V1.0 Version

Download Manual

M24HC

V1.0 Version

Download Manual

M48HC

V1.0 Version

Download Manual

Product Features

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99% MPPT Efficiency

Industry-leading MPPT maximum power point tracking technology with >99% efficiency and <1ms tracking speed for fast and accurate maximum power point tracking.

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Multi-Battery Compatible

Supports Ternary Li-ion, LiFePO4, Lead-acid, Gel and other battery types, independently configurable via PC software.

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Full-Power Charge/Discharge

Supports simultaneous full-power charging and discharging, M24HC/M48HC supports parallel charging for various application scenarios.

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Multi-Protection

Comprehensive protection: PV over-voltage, reverse connection, short circuit, night reverse charging, load overload, load short circuit - 10 protections.

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Multiple Communication

Supports RS485 (Modbus), TTL, Bluetooth (optional), Ethernet (optional), and external 12V power supply.

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Smart Cooling

High-quality aluminum heatsink with forced air cooling (M24HC/M48HC with speed-controlled fan) ensures reliable and efficient operation.

Typical Applications

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Residential Solar Systems

Provides stable solar charging solutions for homes.

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RV Solar Systems

Reliable solar charging for RV camping.

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Solar Surveillance Systems

Provides stable power for security cameras with 24/7 monitoring.

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Telecom Base Stations

Stable power for communication equipment and sensor networks.

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Agricultural Irrigation

Green power support for agricultural irrigation equipment.

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Industrial Off-Grid Power

Independent power supply for remote industrial areas.

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