I suppose you have a good reason for turning off your power but that is not completely sensible.
You will still be charged a supply charge unless you have have the power disconnected.
Simply turn off all the circuit breakers in your meter box except your solar breaker (this should be well marked).
That way you will be making some money rather than wasting your ability to generate solar.
If you really want to turn it all off you don't need to do anything as without power being supplied to your inverter it will not turn on.
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