What you describe sounds like Buy-All Sell-All, except you're allowed to use and store what you produce before paying retail rates for electricity purchased from the service provider.
Is it anti-competitive to deny residential renewable energy producers the right to use the clean energy they invested in producing if they want to purchase electricity?
Another exclusive monopoly contract: if you buy water from me, you can't use the water you capture yourself.
Net metering in the United States: https://en.wikipedia.org/wiki/Net_metering_in_the_United_Sta...
Net metering > "Post-net metering" successor tariffs: https://en.wikipedia.org/wiki/Net_metering#Post-net_metering...
We want there to be renewable residential energy. Subsidizing renewable energy will hasten adoption. We should subsidize residential renewable energy if we want there to be more renewable energy.
If we make the break-even point later in time, residential renewable energy will be less lucrative.