You might be thinking about it as you might a DC circuit or a battery with electron shuffling one-way down the wire.
But it’s AC, the electrons are shuffling in both directions at 50/60hz
Voltage goes forwards and backwards and odd but current also goes forwards and backwards, for both appliances and generators.
The difference between consumer and producer is only the phase angle between the voltage and current waveform.
Because power is VxA, do that across the wave cycle and the power direction changes for consumers and producers.
At every junction, Kirchhoff’s current law will sum the currents so you get a “net current” waveform on a wire that might have both a kettle and a plug in solar panel.
That summation means the kettle will chomp as much current as the panel can deliver and than take more from the grid. Swap the kettle for a small LED which takes a fraction of the current and the sum gives a NET supply, and on to the next junction.
It took me a while to get my head round it too.
But it’s AC, the electrons are shuffling in both directions at 50/60hz
Voltage goes forwards and backwards and odd but current also goes forwards and backwards, for both appliances and generators.
The difference between consumer and producer is only the phase angle between the voltage and current waveform.
Because power is VxA, do that across the wave cycle and the power direction changes for consumers and producers.
At every junction, Kirchhoff’s current law will sum the currents so you get a “net current” waveform on a wire that might have both a kettle and a plug in solar panel.
That summation means the kettle will chomp as much current as the panel can deliver and than take more from the grid. Swap the kettle for a small LED which takes a fraction of the current and the sum gives a NET supply, and on to the next junction.
It took me a while to get my head round it too.