Technology nows allows us to monitor the electricity which is about to be exported to
the grid and divert it to a heater or other farming equipment.
It automatically directs any excess generated electricity, not used by the farm, to the a heater in the hot water cylinder.
If the load from the farm increases, eg. the milking machine or water pump is turned on, the amount of electricity sent to heat water is reduced to help you maintain independence from the grid.