Setting Automatic Switch-Off; Setting The Priority Of The Load - SMA sunny home manager User Manual

9 Load Control

9.3.14 Setting Automatic Switch-Off

If the load has internal automatic switch-off, you must provide additional information in order that
the radio-controlled socket can detect whether the load is in operation or in standby mode.
Example: Heating element with automatic switch-off
A heating element heats the water in a hot water tank. An integrated thermostat ensures that the
heating element is switched off automatically above a specific defined target temperature. The
heating element is controlled via a radio-controlled socket.
Within the time period defined for the heating element (see Section 9.3.16, page 87), it is
switched on and off depending on the availability of PV energy. If the automatic switch-off is
activated and the water has not yet reached the set temperature at the end of the time period, the
heating element can continue to draw electric current from the radio-controlled socket even though
the time period has expired, until the target temperature is reached and the heating element has
switched to standby mode on its own. The Sunny Home Manager recognizes the standby mode of
the heating element and switches the radio-controlled socket off.
Requirement:
☐ The load must not be program-controlled.
Procedure:
1. In the field Load has internal automatic switch-off, activate the checkbox Yes.
2. If required, in the text field Threshold for disconnection, adjust the preset threshold for the
power consumption in standby mode (refer to the load manual for information on power
consumption during standby mode). Tip: Typically the threshold is approximately 50% of the
average power consumption in operation.
3. If required, in the text field Detection time for disconnection recognition, adjust the preset
time period for which the threshold of the power consumption must at least be exceeded in
order to detect standby mode.

9.3.15 Setting the Priority of the Load

The priority determines which load should be switched on preferentially in the event of conflicts.
The priority will only be considered for the following loads:
• Smart appliances with optional energy absorption. You will have already set the priority of
these devices when adding them to your Sunny Home Manager system via the configuration
wizard.
• Loads connected to radio-controlled sockets for which you have set time periods of type Load
can be switched on (see Section 9.3.16, page 87). In the case of the time period type
Load must be switched on, the priority of the load does not have any effect, as the load is
switched on in any event.
86 HoMan_Portal-BA-en-20
SMA Solar Technology AG
User Manual