PHOTONIC UNIVERSE BW SERIES Waterproof 20A 12V/24V Solar Charge Controller PWM Technology | IP67 Rated | For Caravans, Boats & Off-Grid Systems The Photonic Universe Waterproof 20A Solar Charge Controller (SKU: PU2024BW) is a robust and reliable regulator designed to manage your solar power system in demanding environments. Ideal for caravans, motorhomes, campervans, boats, yachts, and other marine or off-grid applications, this 12V/24V auto-sensing PWM controller ensures your batteries are charged efficiently and protected from common electrical issues. Its fully sealed, IP67-rated design guarantees performance even in wet or humid conditions. This 20A solar charge controller intelligently protects your batteries from over-charging and deep discharge, while also preventing reverse current flow from the battery to the solar panel at night. With support for sealed, gel, and flooded battery types, it offers versatile compatibility for various leisure and service battery setups. IMPORTANT NOTE: This controller utilises advanced PWM (Pulse Width Modulation) charging technology for efficient battery management. Key Features ▶ IP67 Waterproof Rating — Fully sealed design for reliable operation in wet and humid environments. ▶ 20A Charge & Load Current — Handles up to 20 Amps for both charging and connected DC loads. ▶ 12V/24V Auto-Sensing — Automatically detects and adapts to your battery system voltage. ▶ PWM Charging Technology — Enhances battery charge acceptance and prolongs battery lifespan. ▶ Wide PV Input Range — Accepts solar panel voltage up to 50V, compatible with various panel types. ▶ Multi-Battery Type Support — Works with Sealed, Gel, and Flooded lead-acid batteries. ▶ Comprehensive Protections — Built-in safeguards against over-charge, over-discharge, overload, short circuit, and overheating. ▶ Temperature Compensation — Features internal and external temperature sensors for optimised charging. ▶ Optional Monitoring — Compatible with MT50 remote meter, Wi-Fi module, or PC software for advanced control. Technical Specifications Parameter Value Rated Charge/Load Current 20A System Voltage 12V / 24V Auto Max. PV Open Circuit Voltage 50V Max. Solar Panel Power (12V) 320W Max. Solar Panel Power (24V) 640W Battery Types Supported Sealed, Gel, Flooded Self-Consumption <9mA (12V), <7mA (24V) Operating Temperature -35°C to +55°C Dimensions (L x W x H) 13.9 x 7.5 x 2.8 cm Weight 470 g Charging & Battery Modes The Photonic Universe 20A PWM solar charge controller offers intelligent 3-stage charging (Bulk, Boost/Equalize, Float) to optimise battery health and extend lifespan. It automatically adjusts charging parameters based on temperature, thanks to its internal and external temperature sensors. Users can select between Sealed, Gel, and Flooded battery types to ensure precise charging tailored to their specific battery chemistry. For advanced monitoring and customisation, the controller supports optional accessories: Remote Meter (MT50): Connect an optional MT50 remote display for real-time system data and parameter adjustments. A compatible cable is required. Wi-Fi Module: An optional Wi-Fi module allows wireless monitoring and control via a dedicated mobile app (requires a special cable). PC Connection: Utilise an RJ45 to USB cable to connect the controller to a Windows PC for monitoring and configuration via free software. Typical Applications Application Description Caravans & Motorhomes Ensures reliable power for leisure batteries, protecting them during extended off-grid stays. Boats & Marine Systems Its IP67 waterproof rating makes it ideal for harsh marine environments, charging service batteries. Campervans & RVs Manages solar input for auxiliary batteries, supporting lights, pumps, and other DC appliances. Small Off-Grid Systems Suitable for remote cabins, sheds, or backup power setups requiring robust battery charging. Built-In Protection Functions This Photonic Universe solar charge controller incorporates multiple electronic safeguards to ensure system stability and battery longevity. These include protection against battery over-charging • battery over-discharging • solar panel reverse polarity • reverse current at night • load over-current • load short circuit • and controller overheating. Common Questions What battery types are compatible with this controller? This controller is designed to work with 12V or 24V Sealed, Gel, and Flooded lead-acid batteries. Ensure your battery type is correctly selected for optimal charging. Can this controller be used in wet outdoor conditions? Yes, the Photonic Universe PU2024BW features an IP67 waterproof rating, meaning it is completely sealed against dust and water ingress, making it safe for use in all weather conditions and marine environments. What is the maximum solar panel power it can handle? For a 12V battery system, it can handle up to 320W of solar panels. For a 24V battery system, it can manage up to 640W of solar panel input. Are remote monitoring options available? Yes, this controller is compatible with an optional MT50 remote meter, a Wi-Fi module for app control, and PC software via a USB connection, all sold separately. Installation Notes Mount the controller in a location that allows for adequate air circulation, even though it is sealed. Always connect the battery to the controller first, before connecting the solar panels. Ensure all wiring connections are secure and correctly polarised to prevent damage. Refer to the manufacturer's instruction manual for detailed wiring diagrams and setup procedures. The controller includes pre-drilled mounting holes for straightforward installation. Before You Buy Verify your battery system voltage (12V or 24V) matches the controller's auto-sensing capability. Confirm your total solar panel power (in Watts) does not exceed the controller's maximum input capacity (320W for 12V, 640W for 24V). Check that your solar panel's open-circuit voltage (Voc) does not exceed 50V. Ensure your battery type (Sealed, Gel, or Flooded) is supported by this PWM controller. Consider if optional monitoring accessories (MT50, Wi-Fi, PC connection) are desired for your setup. Please verify all specifications and compatibility requirements with your existing system components before purchase. This product comes with a 1-year manufacturer's warranty from Photonic Universe.
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