So your 1 kWh excess generation goes to the grid, you get a credit for it for the entire retail rate, they store it for you for free, they ship it back to you when you need it and you are asking how much "they" made off your kWh?
I bit too clever here. You have several audiences on this board. One of them based the vast majority of their decision to switch to solar on the fact that they thought their utility was screwing them over. You will be here quite a while before any of that group
even acknowledges that a IOU has a right to exist, let alone raise rates on them or anyone.
Another distinct group had, as their motivation, the fact that IOUs were so lagging in figuring out a way to adopt clean technology that the gov had to figure out a way to incentivize private power plants in order to get some movement on saving the planet. To this group, as someone mentioned, there was already not enough pricing of the externalities of using off the shelf grid electricity as it was, and by installing a system not only was some money saved, but even assuming, if it could be proven, that non-solar customers somehow were paying "more" ---
this group would argue to the death that non-solar customers are already dodging the external costs of simply checking out and buying whatever the utility is selling, so you aren't going to get any joy from this group talking about the cost structure of utilities either.
A final group which may consist only of me, is more concerned with figuring out a practical way towards a total clean energy system, including personal systems, personal ESS, and EVs. I have actually spent a fair amount of time on CAISO. And as much time then breaking down what utilities are currently doing. I understand the gap between wholesale electricity and delivered electricity, and how a personal power plant slips nicely into the gap.
Wholesale is about 3 cents to 10 cents, and right now in California with a decent non shaded roof and current interest rates a personal power plant is about 11 cents (solar alone) to 16 cents (with Powerwalls ,same generation, just more cost, as an ESS system is the only way that you get to use all of what you produce without the dance of death with the utility).
We need to do two things. Move towards more storage, and torture utilities until a true, non-profit way of covering grid costs is arrived at which is not based on volumetric pricing.
Tier and TOU rates are both a complete scam. No one would even consider going to a supermarket where the price of milk was based on how much milk you had personally used, yet people have accepted this in electricity pricing for so long ..... well, I beat a dead horse at this point.
