Q&A

Our TrimControl™ pack includes:

– 2 E-Telltales®.

– 1 receiver.

– Our Windows App.

Yes, it is. Up to 36 E-Telltales® can be displayed on the same receiver and software.

They offer many other advantages such as:

– Enhanced performance (continuous analysis of the sails trim).

– Ease of installation.

– Intuitive use.

The TrimControl™ system is also a safety equipment:
No need to take risks and venture on the deck in rough weather conditions or at night to check the telltales. Check the sail trims on a screen from the cockpit !

Yes! They were tested and approved on several sailing boats during the Vendée Globe.

Yes, an E-Telltale® mode is operational with the HR processor from NKE.

The bigger, the better. Generally speaking. the e-telltales® are very useful as soon as you can’t see them any longer because it is too dark or because they are hidden by another sail.

The sensor is useful on storm jibs and upwind sails (mainsail, staysail, jib). For the time being, we don’t advise to use it on spinnakers.

Being heavier than a classic ribbon, it will be truly efficient with an AWS > 8 knots.

Yes, of course. They have been designed accordingly.

Two e-Telltales® per sail are a minimum (starboard and port).

For long luffs, two pairs are recommended.

For one pair:

– Height: 30% of the luff (height of centre of effort).

– 2,3ft (70cm) aft from the luff. For two pairs:

– Height: 30% and 75% of the luff 2.3ft (70cm) aft from the luff.

Yes, at any time on the computer, touch pad or smartphone screen. No need to go on deck at night.

Yes, just glue them on the sail.

It will take a few minutes to install it on the sails.

No E-Telltales should be located in the axis of the antenna.

Each time you turn on the app, the app will go out of eco mode the E-Telltales received for the first 10 seconds.

Indeed, you must go to the following address:

C:/Users/XXX/Appdata(hidden by Windows)/Roaming/solutions.trimcontrol.app/logs/



  • 800j without brightness
  • 100j without brightness in 8Hz
  • 200j without brightness in 4Hz
  • 400j without brightness in 2Hz

Everything that happens in the application is recorded in a Logs file available at:

C:/Users/XXX/Appdata(hidden by Windows)/Roaming/solutions.trimcontrol.app/logs/



Output data epenon on two additional interfaces: Ethernet and NMEA/RS232. Still contains USB-B output.

The tab transmits its vibrations and oscillations to the strain gauge which sends the value of this force to the receiver. The variability of this force over 15 values is then calculated. If its variability gives a low value, the penon is at rest, average corresponds to a laminar state (the penon floats in the wind). Strong: the tongue is very agitated.

Bring back to the tutorial

The shape of the ePenon is developed to stretch along the fibers of the sails that wrap themselves. ePenon is also waterproof due to its flexible resin overmolding.
The tab must be oriented in the direction of the passage of the wind in the sail.

Frequency similar to wifi but proprietary protocol. To name only the most common, aluminum, metal, water and carbon materials mitigate/ block the passage of these waves.

Must be left in eco energy mode to recharge on its own and be fully autonomous. Its voltage will remain around 3.7V 0.1V, visible from the communication tab.

Should not be kept in the dark for too long.

Send them to TrimControl for a controlled recharge.

  • Une ou plusieurs paires sur chaque voile. Dépend du bateau, 1 paire pour une voile jusqu’à 50m².

More than 10kts optimum 20kts

Max battery temperature: 140°F. Beyond this temperature, the battery may swell. Regularly climb above 140°F, reduces battery charging and discharging capabilities.

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