Product overview A compact solar charge controller that simplifies PV system connections, provides fast USB charging, and protects batteries during charge and discharge. The controller accepts DC5521 plug access to eliminate complex wiring, supports 12 V and 24 V battery systems with automatic identification and manual adjustment, and is designed for use with photovoltaic panels. Key benefits Faster device charging: Dual USB and Type C outputs support fast charging protocols to speed up charging for cell phones and other USB rechargeable devices. USB output 5V. Easy installation: DC5521 interface offers direct plugin access to the controller, reducing wiring complexity and installation time. Reliable battery protection: Builtin protections include charge and discharge safety hours accumulation, reverse discharge prevention, undervoltage protection, reverse connection protection, overload protection, and short circuit protection. Flexible system support: Works with 12 V and 24 V battery systems and can autodetect the voltage or be manually set for specific configurations. Solarready: Designed to be driven directly by photovoltaic panels as the charging source. Technical highlights Item type: Solar Charge Controller Material: ABS USB output: 5V Output mode: USB Operating temperature range: 35 C to +60 C Scope of application: Solar panels and related small PV systems Gross weight: 120 g / 4.2 oz Interface: DC5521 for direct connection Compatibility and usage notes Universal design: 12 V and 24 V Li ion battery pack systems are supported, with automatic identification and manual adjustment available. Applicable battery types: Controller is applicable to various batteries including open, sealed, and gel types. Do not use this controller with other battery types listed as incompatible such as lithium batteries and NiMH batteries. Charging source: This controller must be used with photovoltaic panels as the charging source only. Do not use DC supplies or other power sources as the charging input. Installation tips: Install the controller as close to the battery as possible to reduce voltage drop from long wiring. Ensure the battery has sufficient voltage at first installation so the controller can recognize the correct battery type. The controller will become warm during operation; mount it on a flat, well ventilated surface. Package contents 1 x Solar Charge Controller 1 x Instruction Manual Typical use scenarios Offgrid phone and device charging while camping: Connect a small PV panel to the controller and use the dual USB and Type C ports to keep phones and USB devices charged while maintaining a 12 V or 24 V battery. RV or boat auxiliary systems: Use the controller to manage solar charging of an auxiliary battery bank, provide protected charging and USB power for onboard electronics, and reduce wiring effort with the DC5521 interface. Garden or remote lighting and battery maintenance: Drive small PV panels to maintain sealed or gel batteries used for lighting or sensors, while protecting batteries from overcharge, undervoltage, and reverse connection. Safety reminders Confirm battery voltage during first installation so the controller can detect the correct system type. Do not use non photovoltaic charging sources. Avoid using with incompatible battery chemistries noted above. Provide ventilation for heat dissipation during operation.