How to Choose the Right Zemismart Roller Shade Motor in 3 Minutes

Choosing the right Zemismart roller shade motor does not have to be difficult. Most customers only need to check three things before buying: the roller tube size, the blind weight, and the smart home protocol they want to use.

If you are replacing a manual roller blind, upgrading your home with a smart blind motor, or building a Home Assistant, Matter, Zigbee, or WiFi smart shading system, this guide will help you quickly narrow down the correct motor without contacting support.

The easiest way to choose is:

1. Measure the aluminum roller tube and confirm the blind weight is within the motor’s supported range.
2. Choose the power type: plug-in, built-in battery, or battery with solar charging.
3. Choose from the available smart home protocols for that motor.

Let’s go step by step.

Step 1: Measure Your Roller Tube Diameter and Confirm the Blind Weight

The first step is to measure the inner diameter of the aluminum roller tube. This is the hollow opening where the motor goes.

Do not measure the outside of the tube. The outside diameter can be larger because of the tube wall thickness. The motor must fit inside the tube, so the inner diameter is the key measurement.

Also check whether your tube is round or slotted/grooved. Some Zemismart motors are designed for round tubes, while others are designed for slotted tubes.

After measuring the tube, check the blind weight.

This step is especially important for larger roller blinds. A motor may fit the tube, but if the blind is too heavy, the motor may struggle or fail to operate smoothly.

Small Tube Motors: Up to 2kg

The small built-in battery motors are best for lightweight roller blinds. According to the product list, these models support up to 2kg:

Choose these if your roller blind is small, lightweight, and uses a compact tube.

37mm / 38mm Motors: 4kg, 5kg, or 9kg

For 37mm and 38mm slotted tubes, Zemismart offers several motor choices with different load ratings.

If your blind is heavier, choose a motor with a higher recommended load instead of only choosing by protocol.

Heavy Blinds: ZM35

For large roller blinds, the ZM35 roller shade motor is the best option from this list. It supports 40mm, 47mm, and 53mm aluminum tubes, uses 110V/230V power, has 10Nm torque, and supports up to 20kg.

If your blind is heavy, start with the ZM35 instead of small battery motors.

Step 2: Choose the Correct Motor Power

Once you know the tube size and blind weight, choose the power source.

Plug-In Motors

Plug-in motors are a better fit when you want continuous power and do not want to recharge a battery.

Choose plug-in power if:

• The blind is used frequently.
• There is an outlet or wiring nearby.
• You want long-term fixed installation.
• Your blind is heavier.

Plug-in 37mm/38mm options include the ZM25RX-11-35-30, ZM25RX-11-35-38, ZM25TQ-2-25, ZM25TQZB-2-25, ZM25Z, and ZM25C.

For heavy blinds, choose the ZM35.

Rechargeable Built-In Battery Motors

Battery motors are the easiest for most DIY installations. They do not require wiring and are ideal for replacing manual blinds.

Choose battery power if:

• You do not want electrical wiring.
• You want a clean installation.
• The window is far from a power outlet.
• You want the easiest installation.

Small battery motor options include the ZM15B, MT15B, ZM16B, and MT16B, each listed with an 800mAh battery.

For larger 37mm/38mm tubes, battery options include the ZM25WB with a 2600mAh battery, ZM25EL with a 3200mAh battery, and MT25B with a 2600mAh battery.

Motors With Solar Charging Support

Solar charging is useful for high or hard-to-reach windows. It can reduce the need to manually recharge the motor.

According to the product list, solar panel support is available on:

• ZM16B Tuya Zigbee motor

• MT16B Matter Thread motor
• ZM25WB Tuya WiFi battery motor
• ZM25EL Tuya Zigbee battery motor
• MT25B Matter Thread battery motor

Choose a solar-supported motor if the window is difficult to reach or if you want lower maintenance.

Step 3: Choose the Smart Home Protocol

Now choose the protocol. This is the final step because not every protocol is available for every tube size and power type.

Protocol Comparison

Tuya WiFi: Best for Simple App Control

Tuya WiFi is a beginner-friendly choice. It is good if you want a simple WiFi roller blind motor and do not want to set up Zigbee.

Tuya WiFi options include:

• ZM25RX-11-35-30
• ZM25RX-11-35-38
• ZM25WB
• ZM35

Choose Tuya WiFi if you want an easy setup and your WiFi coverage near the window is reliable.

Tuya Zigbee: Best for Stable Smart Home Installations

A Zigbee roller shade motor is a good option if you already use Zigbee devices or Home Assistant with a Zigbee coordinator.

Tuya Zigbee options include:

• ZM15B
• ZM16B
• ZM25TQ-2-25
• ZM25TQZB-2-25
• ZM25Z
• ZM25EL

Choose Tuya Zigbee if you are building a more stable smart home network with multiple devices.

Matter WiFi: Best for Cross-Platform Compatibility

A Matter roller shade motor over WiFi is a good choice if you want compatibility across modern smart home platforms.

Matter WiFi options include:

• ZM16A
• ZM25C

Choose Matter WiFi if you want a modern protocol but prefer WiFi instead of Thread.

Matter Thread: Best for Future-Ready Smart Homes

Matter Thread is a strong choice for users who already have a Thread border router and want a more future-ready smart home setup.

Matter Thread options include:

• MT15B
• MT16B
• MT25B

Choose Matter Thread if you use Apple Home, Home Assistant, or another Matter-compatible system with Thread support.

Motor Selection Guide by Scenario

Scenario 1: “I already have a 25mm or 28mm roller blind tube”

Choose a small battery motor. Suitable options include the ZM15B, MT15B, ZM16A, ZM16B, and MT16B.

Make sure your blind weight is within the 2kg recommended load.

Scenario 2: “I use Home Assistant”

For Home Assistant users, Zigbee and Matter Thread are usually the best starting points.

Choose a Zigbee model such as the ZM15B, ZM16B, ZM25Z, or ZM25EL if you already use a Zigbee coordinator.

Choose a Matter Thread model such as the MT15B, MT16B, or MT25B if your Home Assistant setup supports Matter and Thread.

Scenario 3: “I use Apple Home”

For Apple Home, choose Matter where possible.

For small tubes, consider the ZM16A Matter WiFi motor, MT15B Matter Thread motor, or MT16B Matter Thread motor.

For 37mm/38mm tubes, consider the ZM25C Matter WiFi motor or MT25B Matter Thread motor.

Scenario 4: “I need the easiest installation”

Choose a built-in battery motor.

For lightweight blinds, use the ZM15B, MT15B, ZM16A, ZM16B, or MT16B.

For 37mm/38mm tubes, choose the ZM25WB, ZM25EL, or MT25B.

Scenario 5: “My blinds are heavy”

If your blinds are heavy, do not choose a small 0.3Nm motor. For 37mm/38mm tubes, consider 2Nm motors such as the ZM25TQ-2-25, ZM25TQZB-2-25, ZM25Z, or ZM25C.

For larger 40mm, 47mm, or 53mm tubes, choose the ZM35, which supports up to 20kg.

Final Quick Selection Chart