Curtain Motor Voltage Parameters: Instruction Q&A

curtain motors’ voltage parameters

Input Voltage / Battery Voltage / Working Voltage

curtain motors

Take the 25 lithium battery motor as an example, the input voltage is 5V direct current (DC means direct current) when charging the curtain motors.

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Battery voltage 7.4V means that the battery charging voltage and the motor working voltage are both 7.4V, so after inputting 5V to the motor, it also needs to be turned into 7.4V through the transformer to charge the battery.

curtain motors

However, as shown in the picture, the power adapter of our 25 Li battery motor is already built into the motor, so we only need to use a normal 5V charging cable to charge the motor’s battery. After charging the motor will run at an operating voltage of 7.4V.

Direct Current vs. Alternating Current

Direct current (DC) is electricity in which the current flows in one direction and the direction and strength of the voltage is relatively constant. It is commonly used in battery-powered devices, such as torches and wireless curtain motors.

Alternating current (AC) is electricity in which the direction and intensity of the current changes periodically. It is most commonly found in household and industrial power supplies, such as those powered by household outlets.

curtain motors

Our 24 motors require the use of a power adapter to convert household alternating current (AC) to direct current (DC) for use by the motor. Examples of curtain motors powered by DC include systems that use lithium batteries and solar panel charging. These systems are commonly found in places that do not have easy access to household AC power, or in environments where energy self-sufficiency is sought.

Advantages of DC


DC output is stable and unaffected by fluctuations in the power grid, which is particularly important for motorised curtain systems that require high precision control.

Low energy consumption:

DC motors are usually more efficient and consume less energy, which is especially noticeable when using solar power, as solar energy can be directly converted into electricity without conversion losses.

DC vs. AC in curtain motors

Usability comparison:

Installation and maintenance: DC curtain motors are often easier to install, especially where no power lines are required. Whereas AC curtain motor installation may require specialist electrician wiring, especially for complex structures or large building projects. Power supply through household AC, into the motor without having to go through a power adapter to DC.

Ease of operation:

DC curtain motors can often be more easily integrated with smart home systems to provide remote control and automated operation due to their higher degree of intelligence.


Our AC motors have a four-minute thermal protection feature that stops them after four minutes of continuous operation. This is because this type of motor generates a lot of heat during operation, especially at high loads or during continuous operation. If the heat is not dissipated effectively, the temperature inside the motor will continue to rise, which may result in damage to internal components such as windings and bearings due to overheating. Thermal protection protects the internal components of the motor from damage by automatically cutting off power when the motor temperature reaches a threshold for possible damage. This risk is not present with DC motors.

Difference between built-in motors:

DC motors and AC motors have different motors. DC motors use DC-specific motors inside, and AC motors also have special motors.

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