800W DC Buck Converter 20–70V to 2.5–58V 30A Output | Adjustable High-Power Step-Down Module

High-Power DC Step-Down Conversion with Adjustable CV/CC Control

The amiciSolar 800W DC Buck Converter is a high-power, non-isolated step-down module designed to convert 20–70V DC input into an adjustable 2.5–58V DC output.

With up to 30A output current, 800W maximum output power, adjustable constant voltage (CV) and constant current (CC) control, the module is designed for demanding DC power conversion and battery-charging applications.

BUILT-IN INPUT PROTECTION

Input Low-Voltage Protection: Output switches off below 20V input
Input Reverse-Polarity Protection
Temperature-Controlled Cooling

Always verify input polarity and voltage before connecting the module.

INTELLIGENT COOLING FAN

Fan ON: Approx. 55°C
Fan OFF: Approx. 50°C

This helps provide cooling when the module temperature rises during operation.

EXTERNAL MCU & REMOTE CONTROL

For integration with external control systems, the module provides:

External voltage analog input
External current analog input
External ON/OFF control signal
MCU-based output adjustment

External potentiometers can also be used for voltage and current adjustment.

Recommended potentiometers: 100K for voltage / 1K for current
Potentiometer: Not included
Recommended cable length: ≤15cm

SUITABLE FOR DIY POWER APPLICATIONS

The module can be used for:

Battery charging
Solar step-down charging
High-voltage battery systems
High-current DC conversion
Adjustable DIY power supplies
Custom DC power projects


Specifications
Product Type:- High-Power DC Step-Down Converter
Circuit Structure:- Non-Isolated
Input Voltage:- DC 20–70V
Maximum Input Current:- 20A
Output Voltage:- DC 2.5–58V, Adjustable
Maximum Output Current:- 30A
Maximum Output Power:- 800W
Conversion Efficiency:- 92–96%
Standby Current:- ≤70mA
Output Ripple:- ≤120mV
Ripple Test Condition:- Input 24V, Output 12V / 20A
Constant Voltage:- Yes, Adjustable
Constant Current:- Yes, Adjustable
Input Low-Voltage Protection:- Yes; output switches off below 20V input
Reverse Polarity Protection:- Yes, at input
Temperature-Controlled Fan:- Yes
Fan Start Temperature:- Approx. 55°C
Fan Stop Temperature:- Approx. 50°C
MCU Control:- External voltage/current analog input
External ON/OFF Control:- Yes
Working Temperature:- -20°C to 50°C
External Potentiometer:- Voltage 100K / Current 1K (Not in the box)
External Potentiometer Cable:- Recommended ≤15cm
Isolation:- No

⚠️ Important Usage Note

This is a non-isolated buck converter, so the input and output are not electrically isolated. The module is designed for step-down conversion only; the input voltage must be within 20–70V DC and the output must be adjusted within 2.5–58V. For high-power operation, ensure appropriate wiring, connectors, cooling and power-source capacity.