House in the sunshine, house in the snow, 3 KNX weather stations from Elsner

Azimuth, not guesswork: How professionals control shading

News of 12 June 2025

Let solar energy in. Keep the sun out. Automatically.

Automated shading is one of the most effective ways to reduce cooling loads in summer and heating loads in winter – provided the system doesn’t rely on fixed schedules, but instead reacts to sun position, brightness and indoor temperature.

That’s exactly what our KNX weather stations do – with built-in logic designed specifically for façade control.

Control is based on the sun’s azimuth and elevation, including threshold logic and temperature lockout. This means shading remains inactive when solar gains are welcome in winter, and activates reliably during intense sunlight.

On this page, we present three products that are ideal for a wide range of projects – from single-family homes to commercial buildings. Find out more below!

Discover our KNX weather stations

Suntracer KNX pro

For complex façade control

High-end weather station with GPS time signal, ultrasonic wind measurement, brightness, rain, temperature, air pressure, and integrated shading logic for up to 12 façades.
Ideal for sophisticated projects with complex, sun-position-based shading control.

Get to know Suntracer KNX pro

Suntracer KNX sl

Smart design solution

Fully equipped weather station with sun position, wind, rain, brightness and temperature detection – controls up to 8 façades including slat angle adjustment. The slim housing blends discreetly into the façade, making it ideal when design matters.

Discover Suntracer KNX sl

Suntracer KNX sl KNX weather station, GPS reception, 8 shading devices

Suntracer KNX-GPS

Compact and GPS-based

Compact weather station with sun position calculation, rain and wind measurement – for up to 6 facades. The classic solution for automatic shading of objects and private homes.

Learn more about Suntracer KNX-GPS

Suntracer KNX GPS weather station, GPS reception, 6 shading sensors

Suntracer weather stations in our Online Shop

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Our webinars on saving energy with KNX weather stations

Learn how automatic shading works with KNX in two compact online sessions on the topic of ‘Energy saving with KNX weather stations’ – explained in practical terms by our experts Bastian Elsner and Martin Speer.

Part 1: Sun protection control for smart homes
With just a few settings, you can control weather-dependent shading for up to four facades – ideal for single-family homes and those new to automation.

Part 2: Sun protection control for complex buildings
Precise control of up to twelve facades with the Suntracer KNX pro – including louvre tracking, safety functions and individual parameterisation.

➥ Watch the webinar recordings now on the Elsner YouTube channel!

Watch recording of webinar 1 Watch recording of webinar 2