Style: 20A Item type: Solar controller Material: Plastic Overview This compact 20A solar controller manages charging and discharging for 12V or 24V small solar systems. It automatically recognizes system voltage, provides adjustable charge and discharge thresholds, and includes a clear LCD for real time monitoring. Designed for use with lead acid batteries, it is suitable for household, small industrial, and commercial installations. Key benefits Automatic 12V or 24V recognition reduces setup steps and prevents incorrect configuration on first installation when the battery has sufficient voltage. Clear LCD display shows charging and discharging current, cumulative energy generated, and discharge power details to help you monitor system performance and diagnose issues. Multiple adjustable voltage points let you match charging behavior to battery type and application, improving battery life and system reliability. Dual USB outputs provide convenient 5V/2.5A charging for small devices directly from the solar controller. Durable plastic housing and simple wiring make installation straightforward for small off grid systems. Specifications System voltage: 12V or 24V (automatic recognition) Maximum photovoltaic input voltage: 23V for 12V battery; 46V for 24V battery Boost charging voltage: 14.4V Floating charging voltage: 13.7V (default, adjustable) Discharge cut off voltage: 10.7V (default, adjustable) Discharge recovery voltage: 12.6V (default, adjustable) Charging recovery voltage: 13V Light controlled turn on threshold: PV panel 8V (light controlled turn on has a delay) Light controlled turn off threshold: PV panel 8V (light controlled turn off has a delay) USB output: 2 outputs, 5V/2.5A maximum Standby Current: Working Temperature 35 to 60 C What is included 1 x Solar controller 1 x User manual Important usage notes On first installation make sure the battery has enough voltage for the controller to recognize the correct system voltage. Install the controller as close to the battery as possible to avoid voltage drop from long wiring, which can affect voltage detection and switching performance. This controller is suitable only for lead acid batteries, including flooded, sealed, and gel types. Use only photovoltaic panels as the charging source. Do not connect DC or other power sources as the charging input. The controller will heat up during normal operation. Mount on a flat, well ventilated surface to allow cooling. Practical applications Home backup and rural electrification: manage a small rooftop PV array for lights, phone charging, and low power appliances in a home or cabin. Small commercial or industrial lighting: support signage, security lighting, or remote sensors where a compact charge controller and device charging via USB are needed. Mobile and recreational setups: power lights and charge devices in RVs, boats, or weekend workshops using lead acid battery banks and portable PV panels. This solar controller offers simple automatic operation, monitoring via LCD, and adjustable settings to suit common small 12V and 24V lead acid battery systems used in household, industry, and commercial applications.