Paul Burridge schrieb:

The power company run a line to my house. They supply me with
electricity. This amounts to a 230V, 65A facility at the distribution
board in a cupboard under the stairs. I run all my stuff from that
board. The board contains several RCBOs that trip-out in the event of
any leakage current being sensed. If current in = current out; they're
happy and won't trip. Because they don't trip out, I conclude I don't
use any current.
The voltage supplied is 230VAC RMS. Since this is alternating between
equal positive and negative half-cycles, the average level of this
voltage supply is zero.
I use no current and they effectively supply no voltage. Why do I get
billed for electricity usage when I clearly can't have used any?

Because free energy is against one of the laws of thermodynamics - can't
remember which...
As everybody knows, you get fined for doing illegal things
That's what your power company is doing.

Regards
Markus