Somfy Eolis RTS Wind Sensor 24V Kit 9012499 Setup and Fit Guide

Short answer: The Somfy Eolis RTS Wind Sensor 24V DC Kit (9012499) is a wired anemometer that sends an RTS UP command to awnings and exterior screens once wind passes the threshold you set. It runs on 24V, ships with its transformer, and pairs to any RTS motor or Somfy RTS receiver with a PROG press.

Buyers searching for an Eolis RTS wind sensor 24V tend to own an RTS awning already and want it to retract on its own. The fitment question that decides this part is power: the sensor needs a 24V feed within cable reach, while the motor it commands stays on its own 120V circuit. The two talk by radio on 433.420 MHz, so no control wire runs between them.

A wired anemometer for RTS awnings, screens and shutters

The Somfy Eolis RTS Wind Sensor 24V DC Kit (9012499) pairs a cup anemometer with a 24V power supply in one box. Somfy lists seven applications for it: awnings, exterior solar screens, pergolas, rolling shutters, and interior blinds, shades and draperies. Most installs land on the first group, where wind damage costs real money.

The sensor spins in the breeze, compares the reading to a threshold set on its potentiometer, and transmits an RTS UP order when wind crosses that line. A retractable awning rolls in. An exterior screen raises. A rolling shutter responds to the same command its own remote sends.

Somfy builds two wind-sensor styles for RTS. The Eolis RTS mounts on a wall or roof and needs power. The Eolis 3D WireFree RTS clips to the awning front bar and runs on batteries. Choose the 24V kit when the awning sits in an open spot you can wire to, or when one sensor needs to protect several products on the same wall.

Verified specs for the Eolis RTS 24V kit

Two numbers matter most on a quote. The 164 ft cable limit sets how far the transformer can sit from the sensor, so plan an outlet or junction box inside that run. The three-sensor ceiling matters if the motor already listens to a sun sensor or a second wind sensor.

Motors, receivers and remotes it pairs with

Any motor with a built-in RTS receiver accepts the Eolis RTS. On a lateral-arm awning, that covers the Somfy Sunea 535A2 CMO RTS motor (1116321), which adds a compact manual override for operating the awning by hand in a power outage, and the Somfy 525A2 Altus RTS motor (1043423), a common pick for awnings and shutters on LT50 tubes.

A wired 120V motor has no radio of its own. For that awning, the Somfy Universal RTS Receiver (1810627) sits between the motor and its supply and accepts Eolis and Soliris sensors alongside RTS remotes. The receiver raises the awning on a wind order the same way an RTS motor does.

Pairing also needs an RTS control point already programmed to the motor, because the sensor joins through that remote's PROG button. A patio remote such as the Somfy Telis 1 RTS Patio Remote (1810643) fills that role on a single awning. The Somfy sun, wind and rain sensors collection lists the other weather sensors that share this RTS system.

Pairing the sensor to a motor, step by step

Somfy's Eolis and Soliris RTS installation guide (ref. 5055455A) gives this sequence:

1. Press PROG on an RTS remote already programmed to the motor until the motor jogs up and down. Programming mode stays open for 2 minutes.
2. Press the PROG button on the Eolis sensor briefly. The motor jogs again to confirm the link.
3. Turn the wind potentiometer off the Demo position and set the threshold, starting from the central mark.

Repeat the sequence on the same sensor for each motor it should protect. Somfy's US 24V instructions add a safety check before any of this: the remote stored in the motor must match the product's direction, so DOWN lowers the awning. If UP extends the awning, a wind order would push it out in a storm. Check direction first.

Programming steps differ by motor generation and receiver. Pull the install guide for your motor from the Somfy spec library, and see the RTS remote pairing guide for the add and delete steps on the remote side.

Wind threshold, Demo mode and what the awning does

Each mark on the potentiometer equals 10 km/h. Turning toward plus raises the threshold. Somfy's US instructions put the usable range at 6 to 31 mph.

Once wind passes the setting, the sensor sends UP after 2 seconds. While the wind stays above the threshold, the motor ignores manual and automatic commands, so a remote cannot lower the awning into a gust. After the wind drops, a remote can send DOWN again 30 seconds later. In a system with a sun sensor, the awning waits 12 minutes before it redeploys on its own.

Demo mode proves the radio link. Turn the potentiometer to Demo, watch the motor jog, then spin the anemometer by hand. The awning raises in about 2 seconds. Somfy instructs installers to leave Demo before they finish, since Demo shortens the normal delays.

Somfy states that wind sensors do not protect an awning from sudden strong gusts. Keep the awning closed in storms. The wind, sun and rain sensor guide covers how the Eolis works beside Soliris and Ondeis sensors.

Mounting and wiring notes installers ask about

Place the sensor where it feels the same wind as the awning, in an open spot close to the product with no obstacles upwind. Never mount it under the awning or under artificial light. The anemometer goes on top, and the Eolis bracket fits walls or roofs with up to a 15 degree incline. Somfy's guide calls for two horizontal holes 35 mm apart for the bracket.

Wiring stays simple. Run the power leads through the grommet to the removable terminal block. Input polarity does not matter. Kill power and let the transformer discharge before the final connection, and keep the run under 164 ft.

Order the Eolis RTS Wind Sensor 24V DC Kit (9012499) with the motor or receiver above, so the awning retracts on its own the first breezy afternoon you are away.

Frequently asked questions

Does the Eolis RTS 24V sensor work with a wired awning motor?

Yes, through a receiver. A wired 120V motor has no radio, so the Somfy Universal RTS Receiver (1810627) goes between the motor and its power supply. The receiver accepts Eolis wind orders and RTS remotes, and it raises the awning when the sensor reports wind above the threshold you set on the potentiometer.

What wind speed makes the awning retract?

You choose it. The potentiometer sets a threshold between 6 and 31 mph according to Somfy's US instructions, with each mark equal to 10 km/h. Start from the central position. Once the wind passes your setting, the sensor sends an UP order after 2 seconds and blocks other commands until the wind drops.

Can one Eolis RTS sensor protect several awnings?

Yes. Somfy allows one sensor to be stored in several motors, so a single anemometer can guard a row of awnings on the same wall. Repeat the pairing sequence on each motor with its own programmed remote. Each motor accepts up to three RTS sensors, which leaves room for a sun sensor beside the Eolis.

Eolis RTS 24V or Eolis 3D WireFree: which one fits my awning?

Pick the Eolis RTS 24V kit when you can run 24V power within 164 ft and want a wall or roof mount that reads open wind. Pick the Eolis 3D WireFree RTS when the awning has no nearby power, since it rides on the front bar and runs on batteries.

Sources: Somfy product page for ref. 9012499 (somfysystems.com); Somfy Eolis and Soliris RTS installation guide, ref. 5055455A; Somfy Eolis RTS 24V sensor installation and programming instructions, ref. 182450A.

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