20A solar charge controller / regulator 12/24V for camper / caravan / boat
20A solar charge controller / regulator 12/24V for camper / caravan / boat
SKU:PU2024B
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20A Solar Charge Controller / Regulator
Model PU2024B | 12V/24V Auto | PWM Technology
The Photonic Universe 20A Solar Charge Controller (model PU2024B) is a robust and intelligent regulator designed to manage your solar power system efficiently. Ideal for mobile and off-grid applications, this 12V/24V automatic controller ensures your batteries are charged optimally and protected from common electrical issues, extending their lifespan and providing reliable power for your adventures.
Featuring advanced Pulse Width Modulation (PWM) technology, the PU2024B enhances charge acceptance and can even help recover some lost battery capacity. Its comprehensive safety features protect against over-charging, deep discharge, overload, and short circuits, making it a dependable choice for your camper, caravan, boat, or small off-grid setup.
SYSTEM COMPATIBILITY: Automatically detects and works with both 12V and 24V battery systems.
Key Features
| ▶ Automatic Battery Protection — Prevents over-charging and deep discharge for extended battery life. |
| ▶ PWM Technology — Boosts charge acceptance and can help recover lost battery capacity. |
| ▶ Reverse Current Stop — Prevents battery power from flowing back to solar panels at night. |
| ▶ Comprehensive Safety — Includes protection against overload, short circuit, and overheating. |
| ▶ Versatile Compatibility — Works with sealed, gel, and flooded batteries. |
| ▶ High Power Input — Handles up to 320W (12V) or 640W (24V) of solar power. |
| ▶ Advanced Monitoring Options — Connect via remote meter, Wi-Fi module, or PC for detailed control. |
| ▶ Compact Design — Small size (approx. 15.9 x 8.1 x 4.8 cm) for easy installation. |
Technical Specifications
| Parameter | Value |
|---|---|
| Rated Current | 20A |
| System Voltage | 12V / 24V Auto |
| Max Solar Input Voltage | 50V |
| Max Solar Input Power (12V) | 320W |
| Max Solar Input Power (24V) | 640W |
| Self-Consumption | ≤8.4mA (12V) / ≤7.8mA (24V) |
| Operating Temperature | -35°C to +50°C |
| Dimensions | 15.9 x 8.1 x 4.8 cm |
| Weight | 300 g |
Charging & Battery Modes
The Photonic Universe PU2024B charge controller employs advanced PWM (Pulse Width Modulation) technology to ensure efficient and effective battery charging. This method optimises the charging process, leading to increased battery acceptance and potentially recovering some lost capacity over time. It also features a reverse current stop function to prevent energy loss from the battery back to the solar panels during periods of darkness.
This controller is compatible with common battery types including sealed, gel, and flooded lead-acid batteries. For enhanced control and customisation, the PU2024B offers several advanced monitoring and programming options:
| Monitoring Option | Functionality |
|---|---|
| Remote Meter (MT50) | Connects to an optional MT50 remote meter for real-time system performance display and manual setting adjustments. |
| Wi-Fi Module | Allows connection via a Wi-Fi module to a smartphone or tablet app (Android/iOS) for monitoring and parameter adjustment. |
| PC/Laptop Connection | Utilises an RJ45 to USB cable for direct connection to a Windows PC, enabling monitoring and settings adjustment via the free Solar Station Monitor software. |
These communication methods provide access to detailed system data, including voltage, current, battery state of charge, and energy statistics. They also allow for customisation of battery types, charging voltages, stage durations, and load settings.
Typical Applications
| Application | Description |
|---|---|
| Campervans & Motorhomes | Ensures leisure batteries are safely charged from solar panels, powering lights, appliances, and electronics on the go. |
| Caravans | Manages solar input to maintain caravan battery health, suitable for extended touring and off-grid stays. |
| Boats & Yachts | Provides reliable battery charging for marine auxiliary systems, navigation equipment, and onboard comforts. |
| Small Off-Grid Systems | Suitable for sheds, remote cabins, or garden offices requiring a compact and efficient solar power solution. |
Built-In Protection Functions
The Photonic Universe 20A Solar Charge Controller is equipped with a suite of protection features to safeguard your battery and entire solar system. These include automatic cut-off to prevent battery over-charging and deep discharge, which are critical for extending battery life. • It also offers robust protection against overload, short circuits, and overheating, ensuring stable and safe operation under various conditions. • The reverse polarity protection helps prevent damage from incorrect wiring.
Common Questions
What battery types are compatible with this controller?
The Photonic Universe PU2024B is compatible with sealed, gel, and flooded lead-acid batteries. Advanced monitoring options allow for customisation and definition of user-specific battery types.
Can I monitor the controller's performance remotely?
Yes, the controller supports advanced communication. You can connect an optional MT50 remote meter, a Wi-Fi module for smartphone app access, or link it to a PC/laptop via an RJ45 to USB cable for detailed monitoring and programming.
What is PWM technology and how does it benefit my system?
PWM (Pulse Width Modulation) technology is a charging method that efficiently regulates the current from your solar panels to your battery. It helps increase the battery's charge acceptance, leading to faster and more complete charging, and can also contribute to extending battery lifespan.
What is the maximum solar panel input this controller can handle?
The controller can handle a maximum solar input voltage of 50V. For a 12V system, it supports up to 320W of solar power, and for a 24V system, it can manage up to 640W.
Installation Notes
- Ensure correct wiring polarity for solar panels, battery, and load to prevent damage.
- Mount the controller in a well-ventilated area, away from direct sunlight and moisture.
- Use appropriate wire gauges for all connections to minimise voltage drop and ensure safety.
- Refer to the included instruction manual for detailed connection and operation steps.
- For complex installations, consider consulting a qualified electrician or solar installer.
Before You Buy
- Verify your total solar panel wattage does not exceed the controller's maximum input (320W for 12V, 640W for 24V).
- Confirm your battery system voltage (12V or 24V) matches the controller's auto-detection capability.
- Check the type of battery you intend to use (sealed, gel, flooded) for compatibility.
- Ensure you have adequate space for mounting the controller and access for wiring.
- Consider if optional accessories like a remote meter or Wi-Fi module are needed for your setup.
Please verify all specifications and compatibility requirements before purchase. Professional installation is recommended for optimal performance and safety. Product specifications are subject to change by the manufacturer.
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