The BST900W is a high-power, digitally controlled DC-DC step-up (boost) voltage converter. Hobbyists, solar technicians, and electronics engineers use this module to efficiently boost lower input voltages to higher output levels.
Long press SET for 10 seconds. Use arrows to pick a slot (0–9), then press SET again to save.
Press the button twice to enter current adjustment mode. Use the ↑up arrow or ↓down arrow buttons to set the maximum allowable current (A). Press SET again to save. 3.4 Saving Settings (Memory Function) bst900w manual
The BST900W is a programmable, high-power DC-DC . In simple terms, it takes a lower DC voltage and increases it to a higher DC voltage. This device is a popular component among hobbyists and engineers for applications where a higher voltage is needed than the available power supply can provide. Common uses include powering brushed DC motors , charging laptop batteries, running CNC spindles, and acting as a key component in solar charging systems for e-bikes and power stations .
Use the button to configure your desired voltage and current values. The BST900W is a high-power, digitally controlled DC-DC
Hold the OK button for 10 seconds to toggle between "AUTO-OFF" (manual start) and "AUTO-ON" (automatic start at power-on).
Lights when in constant voltage mode. OUT: Indicates that output power is currently active. 3. Operating Instructions Initial Setup Use arrows to pick a slot (0–9), then
This guide was compiled using manufacturer datasheets, verified specifications from resellers (Easytronics, CompactTool, Radiovin), and user community insights. Always refer to the physical documentation included with your specific unit, as minor revisions may occur between production batches.
4-digit LED or LCD showing Volts (V), Amps (A), Watts (W), and Capacity (Ah) Cooling: Built-in fan for thermal management 🕹️ Basic Operation Guide Primary Controls SET Button: Toggles between setting voltage and current. Up/Down Arrows: Increases or decreases the selected value. OK Button: Turns the output ON or OFF . Indicators: OUT: Active output. CV: Constant Voltage mode. CC: Constant Current mode (active during current limiting). ⚙️ Advanced Programming Data Storage and Recall The device can store up to 10 groups of settings (0–9).