Error detection

The Internet portal has a fault detection function that is independent of the inverter manufacturer.
Various types of error detection are available.

The settings can be found in the portal under Configuration = > Error detection.


If a change is made, the floppy disk symbol appears. Please press the icon to save the changes.
JOB » A job is the execution of an error detection.
You can create as many jobs as you like.
In the first column you can select when the error detection (the job) should be executed.
In the second column, you can specify the period of time from the time the error detection is executed.
In this example the error detection is executed daily at 22.00 o'clock and the data of the last 16 hours are considered!
In the further columns you indicate which data should be examined.


  1. You want to check in the morning whether all inverters are feeding into the grid:
    Execute at: 10:00 o'clock
    Data of the last hours: 4
    Activate no data
  2. In the evening you want to check if all inverters are running the same:
    Execute at: 22:00
    Data of the last hours: 16
    Activate inverter comparison
The "No data" error detection simply checks whether the inverter has produced at least 1 Wh in the specified hours.
If this is not the case, an error notification is issued.
The inverter comparison requires that you have at least two inverters in the plant or in the group.
The DC power must be stored in the inverter configuration.
In the inverter comparison, all inverters in the plant or in the groups are compared with each other.
The yields are first normalized to 1kW.
If you have differently oriented roofs, it is recommended to set up groups.
Each group is then examined separately.
For the comparison with the solar radiation you need a solar radiation sensor.
You have to assign this sensor to the respective inverters in the inverter configuration.
You can compare each inverter with the solar radiation, then please activate everywhere, or only certain ones.
The DC power must be stored in the inverter configuration.
When comparing with the solar radiation, the theoretical yield is calculated and this is compared with the actual yield.
You will only receive the error messages of the inverters if the inverters are connected to the monitoring system via RS485 or LAN, as this is the only way we can read out the messages of the inverters directly.
Depending on the inverter, more or less status and error messages are output.

If you want to take the alignment into account, you have to set the azimuth in the inverter configuration the azimuth and the tilt.

The azimuth value is an angle specification and is given in degrees (°)! It
indicates by how many degrees the photovoltaic modules (module level) deviates from the optimal south orientation!
Exact south orientation = 0°.
  • Southeast orientation  = e.g. -15°.
  • Southwest orientation = e.g. +15°.
The inclination indicates the angle of inclination of the modules (roof inclination) (optimum = 30°)!
The orientation is taken into account in the inverter comparison and in the comparison with the solar radiation.


For error detection you must specify the parameters here.

Here you can specify the maximum deviation in %  depending on the relative power.

In case of low yields (fog, snow, continuous rain) the deviations are larger by default, so in our example a maximum deviation of 30% shall apply. In case of nice weather the maximum deviation should be only 15%.

1. Parameter
  • From (kWh/kWp): 0
  • To (kWh/kWp): 1
  • Deviation (%): 30
The comparison should only be executed if the relative yield is between 0 and 1 kWh/kWp!

2. Parameter

  • From (kWh/kWp): 1
  • To (kWh/kWp): ∞
  • Deviation (%): 15
The comparison should only be executed, from a  relative yield of 1 kWh/kWp!
Don't know what percentage to set, then run the system for a few days to see what might be reasonable and then calculate what the default deviation should be in your system.
You can set the parameters in the same way as for the inverter comparison.


You can specify several e-mail addresses to which the error messages are to be sent.
The inverters that have an error are listed in the e-mail.



Once a day you will receive a free SMS in case of an error.
This SMS only indicates that error messages have occurred at the plant.
Please read the exact error messages in your e-mails or online in the portal.

The cell phone number must be specified as follows. → 0049179123456

e.g. international code 0049 for Germany. The zero of the area code is omitted.
Please enter only numbers, NO + / - or spaces
If you do not enter your cell phone number in the format as shown here, then no SMS notification can be sent!