Since I heat my 150l geyser via the Smart Load
output of my Deye inverter (excess solar),
I needed a beter way to manage the heat.
The geyser's own thermostat can be set to max (around 70°C)
Excess solar, after the battery is charged, will heat the geyser.
When it's cloudy, the grid must heat the geyser.
I wanted to take the guess work out.
It will only use grid power at certain times of the day
when the temperature is lower than required.
I now have the ability to customize time of day and temperature required.