SMK 40A MPPT Solar Charge Controller is a versatile, high-performance solar charge controller designed to automatically support 12V, 24V, 36V and 48V battery systems. This makes it suitable for everything from smaller solar installations to medium-sized residential and commercial backup systems.

Using Maximum Power Point Tracking (MPPT) technology, the SMK 40A controller can achieve up to 99.5% efficiency, helping maximize the amount of solar energy transferred from your panels to your battery bank. It supports high-voltage PV input of up to 450VDC, allowing compatible solar panels to be connected in series for efficient solar array design.

The controller features a heavy-duty aluminium heatsink that provides passive, fanless cooling. This allows the unit to operate quietly, making it suitable for indoor installations and protected outdoor environments where low noise is important.

For battery integration, the SMK 40A MPPT supports LiFePO4 lithium, Gel, AGM and flooded batteries. Its RS485 communication port allows compatible smart lithium batteries to communicate with the controller for optimized charging.

Installation is simplified by the controller’s built-in PV and battery breakers, reducing the need for additional external protection equipment. SMK also lists protection against short circuits, reverse polarity and over-temperature.

The SMK 40A MPPT Solar Charge Controller is an excellent choice for customers looking for a flexible controller that can grow with their solar system, from smaller 12V installations to larger 48V home and business systems.

Key Features

• Brand: SMK Solar
• Charging current: 40A
• Automatic 12V / 24V / 36V / 48V battery detection
• Up to 450VDC PV input
• Up to 99.5% MPPT efficiency
• High-voltage solar input
• Fanless passive cooling
• Heavy-duty aluminium heatsink
• RS485 communication
• LiFePO4 compatible
• Gel battery compatible
• AGM battery compatible
• Flooded battery compatible
• Built-in PV and battery breakers
• Short-circuit protection
• Reverse-polarity protection
• Over-temperature protection
• LCD/LED monitoring display
• 3-year manufacturer warranty

Ideal Applications

The SMK 40A MPPT is suitable for:

• 🏠 Small and medium-sized homes
• 🏪 Shops and small businesses
• 🏢 Offices
• 🔋 Backup power systems
• 🏕️ Cabins and off-grid installations
• ☀️ 12V–48V solar systems
• 🔋 Lithium battery systems
• ⚡ Medium-sized solar installations