Source google image: https://4.bp.blogspot.com/-h8yR-0adym8/V1RP3ARS9GI/AAAAAAAACjc/e7WiZDO6Iz0cryfizogg-mHrSredHpB0QCLcB/w1200-h630-p-k-no-nu/viessmann-vitosol-200-FM-capteur-solaire-thermique.jpg
Sonde panneau solaire viessmann
Source google image: https://4.bp.blogspot.com/-h8yR-0adym8/V1RP3ARS9GI/AAAAAAAACjc/e7WiZDO6Iz0cryfizogg-mHrSredHpB0QCLcB/w1200-h630-p-k-no-nu/viessmann-vitosol-200-FM-capteur-solaire-thermique.jpg