20A 12V/24V PWM Solar Charge Controller with Dual USB Ports for Lead-Acid Batteries

Keep your small solar charging setup under control with this 20A 12V/24V PWM Solar Charge Controller, designed for basic off-grid direct current systems using compatible lead-acid batteries.

This compact controller automatically detects 12 volt or 24 volt battery systems, manages solar charging using Pulse Width Modulation charging, and includes an LCD display for checking system status at a glance. Dual Universal Serial Bus output ports are also included for charging suitable 5 volt devices from the connected battery system.

It is best suited to small solar panel installations for caravans, motorhomes, sheds, camping setups, battery maintenance, and other low-voltage solar projects where a simple charge regulator is needed between the solar panel and battery.

Important: this controller is for compatible lead-acid batteries only. It is not suitable for lithium, lithium iron phosphate, nickel-metal hydride, or other battery chemistries unless the exact supplied unit and manual specifically confirm support. 

Key Features

• 20 amp solar charge controller for small 12 volt and 24 volt direct current systems
• Automatic 12 volt / 24 volt battery system detection
• Pulse Width Modulation charging for compatible lead-acid batteries
• Suitable for open, absorbent glass mat and gel lead-acid batteries
• LCD display for basic system status and settings
• Dual Universal Serial Bus output ports for suitable 5 volt devices
• Built-in protection functions for common wiring and load faults
• Compact design for caravan, motorhome, shed, camping and solar battery projects
• Simple screw-terminal connection layout for battery, solar panel and load wiring 

Important Compatibility Notes

• Connect the battery first so the controller can detect the system voltage correctly
• Use only with compatible lead-acid battery types: open, absorbent glass mat and gel
• Do not use with lithium, lithium iron phosphate, nickel-metal hydride or other unsupported batteries
• Do not connect a mains charger, alternator charger, bench power supply or other charging source to the solar input
• Match your solar panel voltage, battery voltage, wiring size and fuse protection to the controller rating
• Installation should be carried out by someone familiar with low-voltage direct current wiring 

Technical Specifications

• Product Type: Solar charge controller
• Charging Method: Pulse Width Modulation
• Rated Current: 20A
• System Voltage: 12V / 24V automatic detection
• Battery Compatibility: Open, absorbent glass mat and gel lead-acid batteries
• Not Compatible With: Lithium, lithium iron phosphate, nickel-metal hydride and unsupported battery types
• Display: LCD status display
• Universal Serial Bus Output: Dual 5V ports, rating to be confirmed from supplied unit
• Solar Input Type: Direct current photovoltaic solar panel input
• Load Output: Direct current load terminals
• Protection Functions: Short-circuit, reverse polarity, overload and reverse-current protection features
• Maximum Solar Input Power: Verify from supplied manual before publishing
• Approximate Size: Verify from supplied unit before publishing
• Connection Type: Screw terminals
• Included Items: 1x solar charge controller, 1x user manual
• Condition: New
• Product Category: Solar panels and accessories
• Applications: Caravan solar, camping power, battery charging 

Package Includes

1x 20A 12V/24V PWM solar charge controller

*The image is for illustrative purposes only. Due to variations in camera settings, lighting, manufacturing processes, monitors, and supply, colours may differ. Product appearance and specifications are subject to change without notice.

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Frequently Asked Questions (FAQs):

Can this be used with lithium batteries?

No. Unless the exact supplied unit and manual specifically state otherwise, this controller should be treated as suitable for lead-acid batteries only. Use it with open, absorbent glass mat or gel lead-acid batteries.

Is this an MPPT solar controller?

No. This is a Pulse Width Modulation solar charge controller, not Maximum Power Point Tracking.

Can I connect a 230 volt charger to this?

No. This is for low-voltage direct current solar panel input only. Do not connect mains power or a mains charger to the solar input.

What order should I connect it in?

Connect the battery first, then the solar panel, then the load. When disconnecting, remove the load first, then the solar panel, then the battery.

Is it suitable for a caravan or motorhome?

Yes, it may be suitable for small 12 volt or 24 volt caravan and motorhome solar charging setups using compatible lead-acid batteries, provided the solar panel, battery, wiring and fuse protection are correctly matched.

Warranty & Returns: