Solar charge controller and floodlight timer designed for a wide range of storage batteries and automatic dusk to dawn control. It prevents overcharge, over discharge, and nighttime back discharge while providing PWM charging protection and flexible lighting control. Key benefits Broad battery compatibility for flexible installation and replacement. Protects battery health by preventing overcharge, over discharge, and back discharge at night. Automated lighting control reduces manual intervention and ensures lights operate only when needed. Preserves solar panel health with open circuit antiovercharge protection. Retains user settings through power interruptions or full battery discharge. Main features Battery compatibility: supports VRLA, gel electrolyte (GEL) batteries, iron based lithium batteries configured as 3.2V x 2, 3.2V x 4, or 3.7V x 1. PWM charging protection reduces harmful effects of overcharging and over discharge. Automatic dusk to dawn operation: turns floodlight on at sunset based on ambient light and turns off at a set time or at sunrise based on light level. Nine adjustable light sensitivity levels to fine tune when the floodlight turns on and off. Half power adjustable mode: nine grades of reduced power or brightness settings to save energy and extend battery runtime. Tandem PWM control to minimize charging circuit voltage loss to one fifth of a diode drop, with charging efficiency between 3 percent and 16 percent. Open circuit antiovercharge protection to safeguard the solar panel from overvoltage conditions. Nonvolatile memory stores user settings so configured parameters remain after unexpected power loss or battery depletion. Typical applications Solar floodlight systems for residential yards, driveways, and gardens where automated dusk to dawn control is required. Offgrid security and perimeter lighting that need reliable battery protection and energy saving modes. Remote area lighting where compatibility with different battery chemistries is needed and settings must persist through power interruptions. How it solves common problems Eliminates manual switching by automatically turning lights on and off based on ambient light and timer settings. Prevents battery damage and premature replacement by controlling charge and discharge limits and blocking reverse discharge at night. Reduces solar panel stress using open circuit protection and improves charging behavior with PWM control. Compatibility and installation notes Select the correct battery type and configuration in the controller to match the battery bank: VRLA, GEL, 3.2V x 2, 3.2V x 4, or 3.7V x 1 iron based lithium options. Configure light sensitivity and half power settings to balance desired illumination time and battery runtime. Designed for use in solar lighting systems and floodlight installations where automated control and battery protection are required.