"Export Threshold
The relay will activate when a set export power Threshold is reached. The relay will remain activated a set minimum ON Period. After this period the relay will deactivate, unless the export threshold still exceeds the set level. If the export has fallen below the threshold after the ON Period, the relay will immediately deactivate and will remain so for the set OFF Period. This function operates independent to the heater outputs. The heater outputs will take priority, therefore the available export power will be 'consumed' by the heaters first. "