Solar controller box supports power solar energy with a 3.7V/24V controller for efficient outdoor operation and reduced electricity costs, featuring advanced technology that maximizes energy conversion. Versatile charging options: TypeC port and multiple charging methods provide convenient power management for your solar light string system, allowing alternative energy sources when sunlight is limited. Robust construction: Glass fiber material in black, measuring 19.5 x 16.5 x 7 cm, designed to withstand varied weather conditions for long lasting outdoor performance and reliability. Circuit design: Optimized circuit board controller ensures consistent output while extending your solar light string's lifespan through intelligent power management and usage optimization. Use scenarios: Garden or patio lighting: power solar light strings along fences, decks, or pergolas with reliable performance and lower running costs. Walkways and signage: suitable for areas with intermittent sun, using alternative energy sources when needed to maintain illumination. Outdoor events and offgrid locations: ideal for campsites, cabins, or temporary setups where robust solar power management supports ongoing light string operation.