Perfectlogic
Member
It is a falacy to compare the cost of utility solar to residential rates. In the US residential rates are about 80% higher than industrial rates. Roughly the industrial sector pays about 7c/kWh while the residential sector pays about 12.5c/kWh. The point here is that wholesale prices are the same regardless of sector. So even the average wholesale price goes from 6 to 4 c/kWh because of cheap wind and utility solar, this will mean very little rate relief for residential ratepayers. The spread from industrial to residential has little to do with the cost of generating power. So the spread will remain. In fact the spread has been widening in both absolute and relative terms over the past 10 years. Residential rates have gone up 3.2% annually for the last 9 years, while industrial has only gone up 2.4% in the same time. It is not the cost of wholesale electicity that is driving this widening gap. I suspect the different owes to greater demand elasticity among industrial ratepayers than residential. So increasingly the residential sector is bearing more than its share of the cost of the grid. So utility solar can go to zero, but the residential sector is still stuck with the bill for the grid.
So the primary issue with distributed solar is whether residential ratepayer are willing to pay for the grid. The attack against distributed solar was that these residents were not paying as much for the grid, as if residents have a moral obligation to subsidize the grid for industrial ratepayers. But what rooftop solar owners are doing is expressing demand elasticity. They are simply not willing to pay higher rates and will modify their homes and finance their own energy investments to do so. It is the unwillingness of marginal residential ratepayers to accept high prices that puts economic pressure on utilities to lower their rates. The regulatory framework cannot do this. Only consumers willing to defect can force utilities to lower their rates. But the defection has to be massive. Electricity consumption has actually been in decline for a while, while revenue rises. So a modest decline cannot motivate a utility to compete. But if the threat of defection is high enough to impact solvency, they will have to change strategy.
Why do you not want residential solar owners to pay for the grid when in fact they are still using it? You want net metering but you don't wan't to pay for it. You can't just go to Wal Mart and expect them to buy groceries for the same price they are selling them for. When distribution has a price there will be a difference between wholesale and retail it's that simple. You might very well be underestimating grid cost, from the income statements I have seen (admittedly only a few) the profit margin has been around 10% for utilities. And the thing is that we still need the grid, without it residential solar owners would have to pay for a battery much larger than they use 90% of the time due to the fluctuations of their energy use which would drive their average cost way higher than utility rates everywhere (except maybe Hawaii) and ofcourse if the solar array is too large compared to electricity usage all excess will go to waste, this whole scenario is very inefficient at this time, we need the grid and everyone who uses it should pay for it.