Style 20A solar controller designed for 12V and 24V systems. Compact ABS enclosure, dual USB ports and a Type C port with fast charging protocol support for 5V USB output. Built in protections and a DC5521 interface make installation and daily use simple and safe. Key benefits Fast charging for phones and USB rechargeable devices via dual USB and Type C ports. Direct DC5521 interface for straightforward connection to the controller, reducing wiring work. Comprehensive safety protections to protect battery and load from reverse discharge, undervoltage, reverse connection, overload, and short circuit. Automatic 12V and 24V detection with manual adjustment option for flexible system setup. Designed to work directly with photovoltaic panels as the charging source. Main features Style: 20A. Item type: Solar Controller. Material: ABS. Gross weight: 120 g. USB output: 5V. Output mode: USB. Working temperature: 35C to +60C. Scope of application: Solar panels and related off grid systems. DC5521 interface for direct access to the controller. Built in discharge safety hours accumulation and multiple protection circuits to improve reliability during operation. Install on a flat, well ventilated surface; the controller will run warm during normal use. Compatibility and battery guidance Supports 12V and 24V systems with automatic identification and manual adjustment. Compatible with common lead acid battery types such as open, sealed, and gel batteries as noted in the instructions. Follow the included usage guidance about battery types. Some instructions indicate certain battery chemistries such as lithium and NiMH are not applicable for this controller. Confirm the battery type before installation. Important usage notes Ensure the battery has sufficient voltage when first connecting so the controller can recognize 12V or 24V correctly. Install the controller as close to the battery as possible to reduce voltage drop on long wiring runs and ensure correct voltage detection. Use only photovoltaic panels as the charging source. Do not use DC supplies or other power sources to charge through the controller. Allow airflow around the unit and avoid installing inside fully enclosed compartments to help dissipate heat. Read the instruction manual before first use. Typical applications Small off grid solar lighting and USB charging stations for cabins, sheds, and caravans. Solar charging for mobile devices and USB powered accessories while camping or traveling. Solar panel driven battery maintainers for 12V or 24V battery banks in remote equipment locations. Package contents 1 x Solar Controller 1 x Instruction Manual This controller provides a practical solution for small solar systems requiring USB charging ports and basic battery management. Follow the specified installation and battery type guidance to ensure correct and safe operation.