1000W DC-DC Buck-Boost MPPT Solar Charging Power Module

1000W DC-DC Automatic Buck-Boost Power Supply Module with MPPT Solar Charging

Take control of your power conversion projects with this versatile 1000W DC-DC Automatic Step-Up & Step-Down Power Supply Module. Featuring MPPT (Maximum Power Point Tracking) technology, adjustable constant voltage and constant current output, and a four-switch synchronous buck-boost design with 8 MOSFETs, this board is engineered for solar chargers, battery chargers, RV systems, and regulated DC power supply applications. Made in Mainland China.

Key Features

• Automatic Buck-Boost Operation: Seamlessly steps voltage up or down — input DC 11V–75V, output DC 8.4V–63V
• MPPT Maximum Power Point Tracking: Optimizes energy harvest from photovoltaic panels, fuel cells, and other variable-output sources
• High Power Capacity: Up to 1000W peak; recommended continuous operation at up to 1000W with adequate heat dissipation
• Adjustable Voltage & Current: Dial in exact output voltage (up to ~65V) and current (1A–25A) using onboard rotary knobs
• Constant Voltage & Constant Current Modes: CV mode current range 0–25±1A; CC mode current range 1–25±1A
• Built-In Protections: Overcurrent protection, over-temperature protection (~100°C threshold), backflow/reverse-injection protection (80V), 40A input/output fuses
• Onboard Cooling Fan Interface: 12V fan connector (output current <200mA) for enhanced thermal management
• Compact Form Factor: 104mm × 56mm board with four corner mounting holes (97mm × 49mm spacing, 3.5mm diameter)

Technical Specifications

Terminal & Knob Guide

Terminal Connections

• IN+ — Input positive terminal
• IN− — Input negative terminal (with current sensing; do NOT connect to OUT−)
• OUT+ — Output positive terminal
• OUT− — Output negative terminal (with current sensing; do NOT connect to IN−)

Rotary Knob Functions

• Output Voltage Knob: Clockwise = higher output voltage (max ~65V)
• Output Current Knob: Clockwise = higher max current limit (~1A–25A)
• Input Voltage Knob: Sets MPPT tracking voltage or under-voltage cutoff (8V–80V range)

Three Operating Modes

Mode 1 — Regulated Power Supply / Charger (No Under-Voltage Protection)

Turn the input voltage knob fully counterclockwise. Connect input power (IN+ to positive, IN− to negative). Power on and adjust the output voltage knob to your target value. Set maximum output current using Method A (count clockwise rotations, ~1A per rotation) or Method B (precision load-based calibration).

Mode 2 — Regulated Power Supply / Charger (With Under-Voltage Protection)

Turn the input voltage knob fully counterclockwise. Connect input power and then slowly turn the input voltage knob clockwise until the output voltage drops sharply (near 0V) — the current input voltage at that point becomes your under-voltage cutoff. Set output voltage and current as in Mode 1.

Mode 3 — MPPT Solar / Fuel Cell Charging

Turn the input voltage knob fully counterclockwise. Connect your photovoltaic panel or fuel cell (IN+ to positive, IN− to negative). Set the output voltage and current limits so that P = V × I exceeds the panel's maximum power. Connect the panel and then slowly adjust the input voltage knob while watching the power reading on the display — the point of maximum displayed power is your MPPT tracking voltage.

Typical Applications

• Solar panel MPPT battery charging systems
• RV and vehicle secondary battery chargers
• Lithium, lead-acid, and supercapacitor/farad capacitor chargers
• Adjustable bench or field DC power supply
• Fuel cell power management
• Voltage-stabilizing supplies for sensitive electronics

What's in the Box

• 1× DC-DC Buck-Boost Power Supply Module (1000W)

Note: Slight color variation from images may occur due to screen settings. Please allow ±1–10mm tolerance due to manual measurement. Battery not included.

For guidance on safe solar photovoltaic system design and wiring best practices, refer to the U.S. Department of Energy – Homeowner's Guide to Solar.

Frequently Asked Questions

Q: What is the difference between the DC-DC buck-boost module's CV and CC modes?

A: In Constant Voltage (CV) mode, the module maintains your set output voltage regardless of load changes (current varies, 0–25A). In Constant Current (CC) mode, the module limits output current to your set maximum (1–25A), allowing voltage to vary — ideal for safely charging batteries to a defined charging current without overloading the source.

Q: Can I use this 1000W MPPT module to charge lithium-ion or LiFePO4 battery packs directly from a solar panel?

A: Yes. Set your output voltage to match the battery's target charge voltage (e.g., 29.2V for a 24V LiFePO4 pack) and set the output current limit to the desired charge rate. Then use Mode 3 (MPPT) to connect your photovoltaic panel and track its maximum power point. The module will regulate both voltage and current to safely charge the pack.

Q: How do I add external cooling for long-term 500W+ continuous operation?

A: The board includes a 12V onboard fan interface (up to 200mA) — connect a compatible 12V cooling fan directly to this header. Alternatively, attach the module's heatsink backplate to a thermally conductive surface or enclosure wall. For sustained loads above 500W, active airflow is strongly recommended to maintain performance and extend service life.

Q: What does backflow protection mean on this buck-boost power supply board?

A: Backflow (reverse-injection) protection prevents current from flowing backwards from the output (e.g., a connected battery) into the input source. This protects both the module and the input power supply from damage. The protection activates up to 80V on this board.