Sensors precisely record the deviations between the possible and the actual power production and provide important key figures in regard to the quality of the entire plant. An error message is generated when a deviation is detected. The irradiation sensor is the most important element of the Sensor Box Professional and Professional Plus. It provides a reference value for the amount of solar irradiation that can be used to to evaluate the potential power production.  Power reductions are easier to analyze with the internal cell temperature sensor. The sensor evaluation provides indications of the cause of the fault. Up to nine Sensor Boxes Professional and Professional Plus can be connected. It is possible to use the Sensor Boxes with their own RS485 inverters on the same bus the Solar-Log™. The Sensor Box Professional Plus also has the option to connect an ambient temperature sensor and window sensor.

The ambient temperature sensor (PT1000) provides additional information on power generation. One problem that could arise and contribute to decreased yields is that the combination of cold temperatures and sunshine causes a buildup of ice. Such problems are easily detected when a sensor is being used. In addition to this, wind speeds can be tracked with a wind sensor and identified much better as possible causes for breakdowns, power reductions or power losses.

The Weather Station with integrated CMP3 pyranometer provides information on air pressure, wind direction, wind strength, humidity and the local solar irradiation. The local measured values give information on how weather influences the PV plant’s output. This data is available in the Solar-Log WEB Enerest™ XL portal.