PHOTONICUNIVERSE SOLAR CHARGE CONTROLLERS 45A 12/24/36/48V PWM Solar Charge Controller Model VS4548AU | Multi-Voltage & Dual USB Output The Photonic Universe 45A 12V/24V/36V/48V PWM Solar Charge Controller (Model VS4548AU) offers robust management for your solar power system. This advanced regulator provides comprehensive monitoring of the charging process and a wide array of load programming features, ensuring full protection for your battery bank. Utilising Pulse Width Modulation (PWM) technology, it optimises charge acceptance and helps extend battery lifespan. Designed for user convenience, this controller features an intuitive LCD display for real-time system insights and a powerful dual USB output (2.4A total) for fast charging of compatible devices. It automatically detects and adapts to 12V, 24V, 36V, or 48V battery systems, making it a versatile choice for various off-grid and renewable energy applications. IMPORTANT NOTE: Automatic system voltage detection for 12V, 24V, 36V, or 48V battery banks. Key Features ▶ PWM Charging Technology — Optimises battery charging and extends lifespan. ▶ Multi-Voltage Auto-Detection — Automatically adapts to 12V, 24V, 36V, or 48V systems. ▶ Integrated LCD Display — Provides real-time system monitoring and energy statistics. ▶ Dual USB Output (2.4A) — Conveniently charges mobile devices directly. ▶ Comprehensive Electronic Protection — Safeguards against common electrical faults. ▶ Optional DC Load Output — Supports 12V loads with programmable settings. ▶ External Temperature Sensor Port — Allows for precise battery temperature compensation. Technical Specifications Parameter Value System Voltage 12V / 24V / 36V / 48V Auto Rated Charge/Discharge Current 45A Max. Solar Panel Input Power (12V) 640W Max. Solar Panel Input Power (24V) 1280W Max. Solar Panel Input Power (36V) 1920W Max. Solar Panel Input Power (48V) 2560W Max. Solar Panel Input Voltage 96V Temperature Sensor Compensation -3mV/°C/2V (25°C) Working Temperature -25°C to +55°C Self-Consumption (12V) max. -9.2mA Self-Consumption (24V) max. -11.7mA Self-Consumption (36V) max. -14.5mA Self-Consumption (48V) max. -17mA Terminals 3 pairs (solar, battery, load) Wire Size Up to 16mm² Dimensions 19.4 x 11.8 x 6.4 cm Weight 880 g Charging & Battery Modes Feature Description Battery Type Compatibility Designed for use with sealed (default), gel, or flooded lead-acid battery banks. Charging Algorithm Utilises advanced PWM (Pulse Width Modulation) technology for efficient multi-stage charging. System Voltage Auto-Detection Automatically identifies and adapts to 12V, 24V, 36V, or 48V battery systems. Programmable Load Output Features an optional 12V DC load output with various settings, ideal for nighttime lighting applications. Temperature Compensation Includes an inbuilt temperature sensor and terminals for an optional remote sensor to optimise charging based on battery temperature. Typical Applications Application Description Off-Grid Cabins & Sheds Provides reliable power management for remote dwellings and outbuildings. Caravans, Motorhomes & Boats Ensures efficient and safe charging for leisure vehicles and marine systems. Small Scale Solar Installations Ideal for residential or commercial backup power systems requiring multi-voltage flexibility. Remote Monitoring Systems Powers sensors, communication equipment, and other devices in isolated locations. Built-In Protection Functions This solar charge controller incorporates a full range of electronic safety functions to protect your system. These include protection against reverse current at night (from the battery back to the solar panel) • automatic cut-off to prevent over-charging • deep discharge protection • overheating protection • overload protection • short circuit protection • and reverse polarity protection for both solar panels and batteries. Common Questions What battery types are compatible with this controller? This controller is designed for use with 12V, 24V, 36V, or 48V sealed (default), gel, or flooded lead-acid battery banks. Can I connect a DC load directly to the controller? Yes, an optional 12V DC load (e.g., lighting or fans) can be connected. The controller offers various programmable settings, including options for nighttime lighting applications. What is PWM technology and how does it benefit my solar system? PWM (Pulse Width Modulation) technology efficiently charges your batteries by regulating the voltage and current from your solar panels. This method helps to increase charge acceptance, recover some lost battery capacity, and extend the overall lifespan of your battery bank. What is the maximum solar panel input I can connect? The controller supports a maximum solar panel input power of 640W for 12V systems, 1280W for 24V, 1920W for 36V, and 2560W for 48V systems. The maximum solar panel input voltage is 96V. Installation Notes Ensure correct polarity for all connections (solar panels, battery, and optional load) to prevent damage. Mount the controller in a cool, dry, and well-ventilated area, away from direct sunlight and moisture. Use appropriate cable gauges for your system's current and distance to minimise voltage drop and ensure safe operation. Refer to the detailed user manual provided with the unit for specific wiring diagrams and operational instructions. Before You Buy Verify your battery bank's nominal voltage (12V, 24V, 36V, or 48V) matches the controller's auto-detection range. Confirm your total solar panel array power does not exceed the controller's maximum input capacity for your system voltage. Ensure the open-circuit voltage (Voc) of your solar array does not exceed the controller's maximum input voltage of 96V. Consider if an external temperature sensor (sold separately) would benefit your specific battery setup for optimised charging. Please verify all specifications and compatibility requirements before purchase. This product includes a 1-year manufacturer warranty.
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