30A Solar Charge Controller 12V 24V Auto 4-Stage

Compact 30A PWM Solar Charge Controller with Digital Display and Built-in Protections Why you need this controller - Reliable charging and battery protection for small off-grid solar setups. The built-in industrial microcontroller and four-stage PWM charging provide stable, efficient charging and automatic memory of settings. - Prevents common system failures with multiple protections including short-circuit, open-circuit, reverse polarity, overload, and dual backflow protection, reducing maintenance and downtime. - Low heat generation and a compact metal and plastic housing allow safe installation in tight spaces. Key features and benefits - Built-in industrial microcontroller for stable control and reliable performance. - One-button setting and digital display for quick configuration and clear status monitoring. - Automatic memory function saves your settings after power loss. - Full 4-stage PWM charge management for correct charging stages and longer lead-acid battery life. - Comprehensive protection: short-circuit, open-circuit, reverse polarity, overload, and dual backflow protection. - Low heat generation helps improve safety and reduces the need for active cooling. - Dual USB output ports for convenient charging of small devices. - Dedicated for lead-acid batteries only; not suitable for nickel-metal hydride, lithium-ion, or other battery types. Performance and compatibility - Rated current: 30 A. - Maximum PV voltage: 50 V (absolute limit). - Selectable 12 V or 24 V system operation (auto). - 12 V PV system guidance: use up to a 120 W solar panel with a 12 V lead-acid battery; recommended maximum PV input voltage 21 V. - 24 V PV system guidance: use up to a 240 W solar panel with a 24 V lead-acid battery; recommended maximum PV input voltage 42 V. - Only compatible with lead-acid battery chemistries. Physical specifications - Material: plastic and metal. - Size: 133 x 70 x 34 mm. - Package contents: 1 solar charge controller and 1 user manual. Practical use scenarios - Off-grid cabin: Manage a 12 V battery bank charged by a small roof-mounted 120 W panel while protecting the battery and connected loads. - Caravan or camper: Regulate charging for a 12 V or 24 V lead-acid starter or leisure battery, charge mobile devices via the dual USB ports, and protect the system during travel. - Remote lighting or signage: Control a 24 V lead-acid battery charged by a 240 W panel with reliable protections and low heat output for continuous operation. Important notes and precautions - Use only with lead-acid batteries; do not connect nickel-metal hydride, lithium-ion, or other battery types. - Allow 0 to 1 cm tolerance for manual measurement of the unit size. - Product color may vary slightly from images due to monitor differences. This controller offers compact, protected PWM charging and easy operation for 12 V and 24 V lead-acid solar systems.