Product Description
Solar Charge Controller
Smart Safety Protection / Eliminate Safety Hazards
This solar charge controller utilizes an intelligent MCU control chip and features a high-definition LCD display that shows key parameters in real time, including battery voltage, charging current, load current, and ambient temperature. It supports automatic recognition of 12V/24V systems and incorporates multiple protection features including overcharge, over-discharge, overload, short circuit, and reverse connection protection. Dual USB ports enable direct charging for mobile phones, tablets, and other devices. Additionally, it supports external temperature sensors and remote control, making it suitable for residential solar power systems, outdoor photovoltaic energy storage, RV/camping photovoltaic power supply, and other scenarios. Installation is convenient, and operation is stable.
Six Major Protections
Overcurrent Short-Circuit Open-Circuit Protection Protection Protection
Backflow Thermal Reverse
Prevention Circuit Control Protection Connection Protection
Functional Features
Anti-Backflow Circuit with Ultra-Low Heat Generation
Features industrial-grade main control chip
Light-Sensor + Delay Control
Multiple load operating modes, customizable settings
Charging Current
Discharging Current
Operating Temperature
Charge/Discharge Current Display
Quick and convenient access to charging/discharging data
Safety Usage Recommendations
1. This controller automatically detects 12V/24V batteries. During initial installation, ensure the battery has sufficient voltage for the controller to correctly identify the battery type.
2. Install the controller as close to the battery as possible to avoid voltage drop caused by excessively long wires, which may affect accurate voltage detection.
3. This controller is compatible with ternary lithium batteries, lead-acid batteries (including open-vented, sealed, gel, etc.), and lithium iron phosphate batteries.
b01: Lead-acid battery (12V/24V auto-detection)
b02: Ternary lithium battery (3 cells in series at 3.7V=11.1V)
b03: Lithium Iron Phosphate Battery (4 series 3.2V = 12.8V)
4. Use only photovoltaic panels as the charging source. Do not use DC or other power sources for charging.
5. The controller generates heat during operation. Ensure it is installed on a flat, well-ventilated surface.
Product Views
Solar panels
AC load Inverter Battery DC load
Display Interface/Parameter Settings
01 Main Interface 02 Full-Charge Cut-Off Voltage 03 Discharge Recovery Voltage
Browse Interface
Press the menu button briefly to
cycle through interfaces and parameters.
Settings Interface
Press and hold the menu button for 3 seconds to
enter manual adjustment mode.When the digits flash, 04 Discharge Cut-off Voltage
use the up/down buttons to adjust parameters.
07 Operating Parameter Display 06 Load Operation 05 Battery Type
Submenu under the Operating Parameters Display Menu
Operating Temperature Display Charging Current Display Discharging Current Display
Icon Definitions/Buttons
Display of battery voltage
or light-controlled delay
shutdown time
Menu Key
Solar input indicator
Up Scroll
Charging indicator: Flashing
indicates charging;steady
light indicates full charge
or constant-voltage charging
Down Scroll/Manual
Battery capacity indicator
Load activation indicator
Product parameters
Model | K1688 | ||
System Voltage | 12V/24V auto-adaptive | ||
Rated Charge Current | 10A | 20A | 30A |
Rated Discharge Current | 10A | 10A | 10A |
Maximum PV Voltage | Max 23V with 12V battery; max 46V with 24V battery | ||
Quick-Select Settings Charge Battery | b01 Lead-acid battery | b02 Ternary lithium battery | b03 Lithium iron phosphate battery |
Full Charge Cut-off Voltage | 14.4V | 12.6V | 14.6V |
Discharge Cut-off Voltage | 10.7V | 9V | 10V |
Discharge Recovery Voltage | 12.6V | 10.5V | 12V |
Charge Recovery Voltage | 13.2V | 11.8V | 13.7V |
Light-Sensor On Threshold | Solar Panel 8V (Light-controlled on with delay) | ||
Light-Sensor Off Threshold | Solar Panel 8V (Light-controlled off with delay) | ||
USB Output | 2 USB Outputs, 5V/2A (Max) | ||
Standby Current | <10mA | ||
Operating Temperature | -35°C to +60°C | ||
Dimensions / Weight | 125×112×34mm / 179g | ||
Friendly Reminder: The battery voltage displayed on the screen may show slight discrepancies. Please refer to the actual reading.
*Voltage marked in red applies only to 12V systems. For 24V systems, multiply by 2.
*This manual is a general guide. If minor differences exist between the manual and the actual product, please refer to the actual product.
*Product specifications are subject to change without notice.
System Connection
1. Connect the battery terminals to the controller as shown in the diagram. The controller will automatically detect the battery voltage.
2. Connect the load terminals to the controller as shown in the diagram. Ensure polarity is correct.
3. Connect the solar panel to the controller as shown in the diagram.
Dimensions: 125*112*34mm
Weight: 179g
Application
Solar-Powered Garden Lights Smart Home
