Entering the Minimum Switch-On and Switch-Off Time
This option can only be set for non-program-controlled loads.
Information about configuring switch-on and switch-off times
Loads are not designed to be switched on and off an infinite number of times during their service life. Internal components such as relays can fail after several thousand switching cycles due to material fatigue. In fickle weather conditions with highly variable PV power generation, the load may be switched on and off every few minutes because there is only enough surplus PV energy for brief periods.
You can set minimum switch-on and switch-off times when configuring the load characteristics in order to prevent loads from being switched on and off too frequently and experiencing too many switching cycles. If this is done, however, power may be drawn from the utility grid to operate the load if PV power generation drops briefly. Conversely, surplus PV energy may be "lost" during switch-off times.
If you select a long minimum switch-on time, by contrast, the load may not be switched on very often since there are very few adequately long periods in the PV power generation forecast with enough power to operate the load during the overall minimum switch-on time.
It is worth trying out different time settings in order to gradually find the best values for each load.
Setting | Explanation |
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Minimum switch-on time | The minimum switch-on time is the minimum time that the load connected must remain switched on, for example, to complete its starting sequence or complete a work sequence. Delayed activation possible:
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Minimum switch-off time | The minimum switch-off time is the minimum time the connected load must remain switched off, for example, to prevent overheating or enable restarting.
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