AeternaSol 20A PWM Solar Charge Controller with Dual USB and LCD
Product description
At 13.5L × 7W × 3H cm, this blue AeternaSol solar charge controller is a compact way to manage a 12V or 24V solar battery system. Its ABS housing brings together charging controls, an LCD display and two USB ports, helping keep essential system information and everyday device charging in one place.
The controller handles up to 20A and automatically detects 12V or 24V systems. It supports open, AGM, GEL and leisure batteries, making it relevant to setups in caravans, motorhomes, canal boats and off-grid spaces.
Strengths
Three-stage PWM charging is paired with protection against overcurrent, short circuits, reverse wiring, low voltage and overcharging. An adjustable cut-off level helps prevent the battery from being discharged too far, while the built-in control chip retains settings if the battery runs flat. That saved setup is useful for a system that may not be in continuous use, such as a holiday home or garden shed.
The LCD lets you check system status, change modes and adjust parameters at the controller. Two USB ports provide a direct way to charge phones and tablets from the solar system, with a maximum output of 5V/2.5A. Need both battery management and a place to plug in everyday devices? This combines those functions in one unit rather than relying on a separate USB charger.
What to know
The controller is rated for up to 20A and detects whether the connected system is 12V or 24V, so there is no manual voltage selection step. It is compatible with open, AGM, GEL and leisure battery types. Charging is automatic, and the adjustable low-voltage cut-off lets you set when the controller stops drawing the battery down further.
Its controls also include timer settings for ON/OFF operation, alongside mode and parameter adjustments through the LCD. The blue ABS unit measures 13.5L × 7W × 3H cm. For a caravan, motorhome or off-grid installation, these features bring charging control and USB access together without needing to manage system settings each time the battery runs flat.
Getting the most from it
Use the display to check the system and set the available parameters for your battery setup. Choose the cut-off level with battery protection in mind, and use the two USB ports for compatible devices such as phones or tablets. In a garden shed or allotment, the automatic voltage detection and saved settings can make routine solar system use more straightforward, in a motorhome or canal boat, the USB outputs add a convenient charging point alongside battery management.
Practical questions
Which battery types does it support? It works with open, AGM, GEL and leisure batteries, covering common battery types used in caravans, canal boats and holiday homes.
Does it work with both 12V and 24V systems? Yes. It automatically detects 12V or 24V when connected, without requiring manual voltage selection.
What can I use the timer for? The controller includes timer settings for ON/OFF operation. Its LCD also allows you to check status, change modes and adjust parameters.
Buying verdict
For a solar setup that needs automatic 12V/24V detection, support for several common battery types and a built-in way to charge phones or tablets, the AeternaSol 20A controller brings practical functions into one compact unit. It is well suited to caravan, motorhome, boat and off-grid installations where clear system information and adjustable battery protection are useful day to day.