Feature: Using industrial-grade main control chip, real-time display of working temperature, charging current and discharge current. Large-screen LCD display, charge and discharge current display, cumulative power generation and discharge power query, temperature display, light control + delay control, adjustable charge and discharge parameters, with power-off memory, etc. Dual USB output, the maximum current is up to 2.5A, supporting Apple mobile phone charging. Complete 3-stage charging management, it can effectively protect the battery and make the battery more durable. Built-in over-current, short-circuit protection, open-circuit protection, and reverse connection protection, all of which are self-recovery, without damaging the controller. Anti-backflow circuit, ultra-low heat generation, auto focus, high charging efficiency, non-stop detection. Specification: Model: K1688 Colour: Black Material:ABS System voltage: 12V/24V automatic adaptation Rated charging current: 10A Rated discharge current: 10A Maximum PV voltage: 50V Maximum PV input power: 130W (12V) 260W (24V) Boost charging voltage: 14.4V Float voltage: 13.7V (default, adjustable) Discharge cut-off voltage: 10.7V (default, adjustable) Discharge recovery voltage: 12.6V (default, adjustable) Charging recovery voltage: 13V Threshold of light-controlled light-on: photovoltaic panel 8V (light-controlled light-on has a delay) Threshold of light-controlled light-off: photovoltaic panel 8V (light-controlled light-off has a delay) USB output: 2-way USB output, 5V/2.5A (maximum) Standby current: