Even with generous government subsidies and mandates, penetration of wind and solar power is still very small with about 4% of world's electricity energy mostly due to Solar PV "religion" in Germany and the rest of Europe. It's only about 1% of the total in the US.
The cost of solar & wind power is a large burden to consumers and taxpayers where there it has been adopted on a large scale, such as in Europe. The average cost of electricity in the US is about $0.10 per KW-h but Germany and Denmark burden it's people and industry with punitive costs of $0.33 per KW-h. It's mostly due to subsidies for the renewables since these expensive forms of power are not economic. Even then, all of the costs are probably NOT included in the unit costs. The reality is likely worse. For example, Germany has installed additional power cables to/from Sweden and France to help cope with the intermittent nature of this alternative power. Subsidizing conventional power companies, who remain partly on standby when there is abundant sun and wind, adds to the burden. Taxpayers are picking up this additional tab.
|Countries shown above in "red" are those experiencing severe debt problems. Solar and wind subsidies worsen these problems|
How can paying twice the capital cost ever make sense? Yes, existing power plants are already built, so people take comfort in ignoring the conventional utility power companies. But as subsidies rise for homeowner installations, the power utilities find their revenues and profits are down, so THEY begin to require subsidies as well. This means that subsidies then are required for everyone! All this to support these low quality and expensive alternatives! How can this ever work?
Many countries, including many in Europe are already having debt problems. Solar and wind subsidies ADD to their problems! It's really insane.
The Figure below shows some of the more obvious problems with Solar and Wind that ultimately limit it's adoption on a wide scale. Gail Tverberg writes frequently about these issues in her blog called Our Finite World.
|Numerous Problems and Costs Associated with Low Quality Intermittent Power Generation|
On a regional or national level, the example of Germany shows the problems with widespread solar PV power adoption. For 4 months of the year during winter (when their power demand is highest), there is little sun since they are at 50 deg N Latitude with plenty of clouds, so they are reliant on conventional power generation (or purchased power from Sweden or France). In the summer, when the sun comes out, the surge of solar power generation requires that nearly all of traditional power generation to shut down and/or requires them to sell power to neighboring countries. Furthermore, wholesale spot power rates go NEGATIVE during sunny periods meaning producers aren't making money to add to the grid, they're LOSING money during these peaks.. If you don't have neighbors to sell to, then that creates a huge problem due to the time required to start and stop large conventional production. And the electric power grid must be modified to accommodate these variable power flows-- which costs taxpayers money. Then, idling conventional plants in summer cause the electric utilities to lose money where they aren't able to pay investors their dividends, so Germany has to provide assistance to the utilities!
So in Germany, the solar installations don't make economic sense because of their costs. But Germany is in the grip of a climate change/solar energy fantasy which borders on a false religion since solar has never made sense there. Making public policy based on fantasy is not likely to work.
Wind has similar problems too. There are higher maintenance costs for these generators. You will often see many idle windmills in wind farms. They aren't very durable and require frequent repair.
Trying to substitute expensive energy for cheap energy is like trying to make water run uphill. It is virtually impossible to make such a system work. It makes everyone from governments to businesses to citizens poorer in the process.