Have been searching of how to maximise the self-consumption on a grid tie connection without batteries with Zero Export Limitations to the grid.
MK2PV system uses parameters from variables that have been already exported to the grid, so it calculates an Energy Bucket that is the energy that can be diverted. In this case I cannot measure those units as it will be zero export.
The inverter, has got a dry contact that can be activated according to a certain Energy Bucket and then it will trigger the dump load. The problem is that the heater consumes 1,5kw so when switched ON this will be consuming power from the grid. The PV array will be around 2-2.5kw.
Was thinking in building a PWM regulator within an Arduino but again I don’t know from where to get the variables to monitor that Energy Bucket which would allow me to regulate the power going onto the heater.
Any ideas will be welcome.