AZO Digital Solar MPPT Charge Controller 12/24V 20A

Solar MPPT charge controller for 12V and 24V systems, delivering a maximum charge current of 20A with advanced Maximum Power Point Tracking technology. Its high tracking efficiency of over 99.5% and conversion efficiency up to 98% ensure maximum energy harvest from your solar panels, even in challenging light conditions. The controller supports sealed lead-acid, gel, flooded lead-acid, and lithium (LiFePO4) batteries, with a 3-stage charging algorithm plus equalization for optimal battery health.

Advantages

The AZO Digital MPPT controller automatically detects system voltage (12V or 24V) and accepts PV input voltages up to 100V, allowing flexible panel configurations. It features a backlit LCD display for clear monitoring of charging status, battery voltage, and load output. The integrated RS485 communication interface enables remote monitoring and data logging. A USB output (5V/2A) is provided for charging small devices. Comprehensive protection includes overcharge, over-discharge, overload, short circuit, reverse polarity for both PV and battery, and over-temperature. The common negative grounding simplifies installation in various setups. The programmable load output with timer function offers control over connected DC loads.

Suitable for

• Off-grid solar systems for cabins, RVs, boats, and remote homes
• 12V and 24V battery banks with lead-acid or lithium chemistry
• Solar street lighting and surveillance systems
• Portable solar generators and backup power solutions

Key specifications

• MPPT technology with >99.5% tracking efficiency
• System voltage: 12V/24V auto-detection
• Max charge current: 20A
• Max PV input voltage: 100V
• Max PV input power: 260W (12V) / 520W (24V)
• Battery types: Sealed, Gel, Flooded, LiFePO4
• Charging algorithm: 3-stage + equalization
• Self-consumption: <10mA
• Operating temperature: -20°C to +55°C
• Backlit LCD display, RS485, USB 5V/2A
• Protection: overcharge, over-discharge, overload, short circuit, reverse polarity, over-temperature
• Grounding: common negative

Recommendations

For optimal performance, size your solar array so that the open-circuit voltage (VOC) does not exceed 100V at the lowest expected temperature. Use appropriate wire gauges for 20A current and ensure proper ventilation around the controller. Configure the battery type via the LCD menu to match your battery chemistry. Regularly check connections and keep the controller clean and dry.