The Somfy Sonesse 40 WireFree Zigbee (Li-ion) (USB-C), part 1245993, puts a rechargeable battery and a Zigbee 3.0 radio inside a single 40mm tubular body. No power run, no receiver, no low voltage transformer above the window. You charge it over USB-C and pair it to TaHoma pro.
Tube Diameter Decides This Motor
Somfy publishes a minimum tube inner diameter of 1.46 in for this motor. Measure the inside of your tube before you order, not the outside. A 40mm octagonal tube clears that figure with room for the crown to seat. The motor body measures 1.57 in across and 25.59 in long, so the tube needs enough clear length to take the motor plus the crown and drive at the far end. Installers who measure the outside diameter and assume the wall thickness order the wrong motor more often than any other mistake on a 40mm build.
The store listing for 1245993 prints a 38mm (1.5 in) minimum internal diameter. Somfy's own record for reference 1245993 reads 1.46 in, which is 37mm. Use the Somfy figure when you size a tube. The gap matters on thick-wall profiled tube, where half a millimeter of wall decides whether the crown seats.
Shades This Motor Drives
Somfy lists one application family for the Sonesse 40 WireFree Zigbee: interior blinds and shades. The 4 Nm rating, about 35 in-lb, carries a standard interior roller shade in a residential or light commercial opening. Blackout fabric on a wide tube draws more torque than a light screen of the same width, so weigh the fabric roll rather than the width alone when you sit near the top of the range.
The battery build earns its keep on retrofit work. A finished room with plaster walls and no attic access gives an installer nowhere to pull 120V, and the WireFree body removes that problem from the job. Somfy rates the battery for about one recharge per year on a reference blind. Real cycles per charge depend on drop length and how many times per day the shade moves.
Somfy rates the motor IP 30 and Class III. Keep it indoors. Exterior screens and awnings belong on a Sunea or Maestria motor built for weather.
Verified Specifications from Somfy
Every figure below comes from Somfy's published record for reference 1245993.
| Specification | Published value |
|---|---|
| Torque | 4 Nm (35 in-lb) |
| Speed | 20 rpm |
| Power | 12V DC rechargeable lithium-ion |
| Rated current | 1.7 A |
| Consumption in operation | 18.4 W |
| Standby consumption | 0.78 W |
| Protocol | Zigbee 3.0, 2.450 GHz |
| Range, open field | 262.48 ft |
| Noise level | 40 dB |
| Ingress protection | IP 30 |
| Insulation class | Class III |
| Head type | Round, white cover supplied |
| Motor diameter | 1.57 in |
| Motor length | 25.59 in |
| Minimum tube inner diameter | 1.46 in |
| Limit switches | Electronic, 200 turn capacity |
| Charging | USB-C, removable cable |
| Operating temperature | 32 to 140 F |
| Storage temperature | -4 to 140 F |
| Thermal protection | 6 min |
| Weight | 2.43 lb |
| Warranty | 5 years |
Tube Hardware That Fits the LS40 Body
The Sonesse 40 WireFree uses the same LS40 crown and drive family as the wired Sonesse 40 motors, so the hardware side of a WireFree build looks familiar to anyone who has assembled a 400 Series shade. The LS40 Crown and Drive Set (9012224) covers round 40mm tube. For octagonal tube, the LS40 Octagonal Rubberized Crown and Drive Set (9016655) adds a rubber layer that damps the drive and takes noise out of a shade already running at 40 dB.
Bracket fit runs through a motor plate. The Sonesse 30-40 Motor Plate for RollEase 360 R3-R8 (9026001) adapts the round head to RollEase 360 brackets with a 10mm x 1.8mm slot and a 7mm pin. Confirm the bracket series on the hardware you already stock before you pick a plate, since the R3-R8 plate will not seat in a SkyLine bracket.
Zigbee 3.0 Pairing and TaHoma pro
Zigbee 3.0 gives this motor a mesh network rather than a point to point link. Every mains powered Zigbee device in the house extends the mesh, which helps in a home where the hub sits two floors below the shade. Somfy publishes 262.48 ft of open field range at 2.450 GHz. Interior walls cut that figure, and the mesh is what recovers it.
You pair the motor to TaHoma pro, and the app reports live position and battery state for each shade. Somfy's TaHoma switch then carries the shade into Amazon Alexa, Google Home, and Apple Home for voice control. RTS remotes do not pair to this motor. The radio inside it speaks Zigbee, and an RTS Situo or Telis handset will not reach it, so plan the control layer around TaHoma from the start.
USB-C Charging and Battery Planning
The USB-C port takes a removable cable, which means a shade high on a stairwell wall does not force you to pull the whole motor for a charge. The Somfy USB-C Magnetic Adaptor (9028564) snaps the cable on and off the port without the fiddle of aligning a connector overhead on a ladder. Somfy also publishes a solar panel option for installations where a recharge visit costs more than the panel.
Standby draw sits at 0.78 W, and the motor pulls 18.4 W with 1.7 A while it runs. Thermal protection cuts in after 6 minutes of continuous operation, which no interior shade cycle will reach. Somfy rates the electronic limits at a 200 turn capacity, plenty for a tall drop on 40mm tube. Confirm the charging connector on the motor you receive before you order a spare cable, since Somfy ships more than one WireFree charging standard across the range.
Frequently Asked Questions
What tube does the Sonesse 40 WireFree Zigbee fit?
Somfy publishes a minimum tube inner diameter of 1.46 in for reference 1245993. A 40mm octagonal or 40mm round tube accepts it with the matching LS40 crown and drive. The motor body measures 1.57 in in diameter and 25.59 in long, so the tube needs clear internal length for the motor and the drive end together.
Can I use an RTS remote with this motor?
No. The Sonesse 40 WireFree Zigbee carries a Zigbee 3.0 radio at 2.450 GHz, and RTS handsets transmit at 433.42 MHz. Pair the motor to TaHoma pro instead. A TaHoma switch then adds Alexa, Google Home, and Apple Home voice control on top of the app.
How often does the battery need a recharge?
Somfy rates the lithium-ion battery at about one recharge per year on a reference blind. Drop length, fabric weight, and daily cycle count all move that number. The TaHoma pro app reports battery state for each motor, so you can plan a charging visit rather than wait for a shade to stop.
Is this motor rated for exterior shades?
No. Somfy rates it IP 30 and Class III, and lists interior blinds and shades as its application. For exterior screens, awnings, and rolling shutters, choose a Somfy motor built for weather exposure, such as the Sunea or Maestria family.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
