Apple makes California solar deal

Electronics manufacturer Apple has announced an $848 million deal to buy electricity from a solar energy project to be developed in California. Project developer First Solar has described the power purchase agreement as "the largest agreement in the industry to provide clean energy to a commercial end user."

Solar photovoltaic panels in the Utah desert.

Earlier this week, Apple announced the deal with First Solar, Inc., to buy power from First Solar's California Flats Solar Project in Monterey County, California.  Under a 25-year power purchase agreement or PPA, Apple will buy the equivalent of 130 megawatts of the solar project's output. 

First Solar is a vertically-integrated solar company, manufacturing solar photovoltaic panels, developing utility-scale photovoltaic power plants, and providing solar project support services.  First Solar boasts involvement with over 10 gigawatts of installed solar photovoltaic capacity worldwide.  Its resume includes the 550-megawatt Topaz Solar project in California and the 290-megawatt Agua Caliente project, which was once the world's largest operating solar energy project.

First Solar's California Flats Solar Project will occupy a 2,900-acre site on the Jack Ranch in Cholame, California.  Owned by Hearst Corporation, the project site was formerly a dryland farm, and occupies about 3% of the Jack Ranch property.  First Solar expects to begin construction later this year, and to complete the project by the end of 2016.

With a total project capacity of 280 megawatts, Apple's 130-megawatt commitment covers about 46% of the project's output.  The project's remaining 150 megawatts will be sold to utility Pacific Gas & Electric under a separate long-term PPA.

Apple has developed other renewable energy projects, including fuel cells and solar panels at its Maiden, North Carolina data center.  Other high-tech companies have also made significant investments in renewable energy, including Google's commitment of over $1.5 billion to solar and wind projects through power purchase agreements and direct investments.

California utility time of use rates

California regulators have upheld a decision to change the way many business and agricultural customers are charged for electricity.  Under the new structure, known as "time of use" pricing, customers will pay different rates for the energy consume depending on the real-time balance of supply and demand.

Historically, electricity consumers paid rates set by state public utilities commissions that, in the aggregate, allow utilities to recover their costs and make a reasonable rate of return on their investment.  Typically, these rates for energy have been fixed in advance, changing only when a utility files a new tariff or secures its regulators' approval to raise the rates.  Absent such a change, customers' retail rates remained fixed throughout the day and the year.

In recent years, real-time wholesale markets have developed across much of the United States.  The true cost of producing and delivering power varies in real time, depending on the balance of supply and demand.  If consumers demand more electricity, more and more expensive generating units are required to serve their load, resulting in an increase in the true cost of power.  Conversely, at night or during mild weather, decreased demand typically leads to a reduction in the real-time cost of power.  Real-time wholesale markets are designed to allow utilities and other wholesale buyers to respond to price variations, buying more electricity when it is less expensive or conserving power when prices rise.  Most retail customers like homeowners and businesses are not directly exposed to these real-time variations, instead paying the utility's fixed tariff rates.

This paradigm is starting to change in parts of the country.   In 2010, the California Public Utilities Commission ordered utility Pacific Gas and Electric Co. to implement a variable pricing structure for many of its business and agricultural customers by next March. The utility asked the regulators to allow customers to opt out of the time of use rates and back in to their previous fixed rates, pointing to its experience with customer complaints over a lack of an opt-out mechanism for smart meters.

Last week, the commission upheld its earlier decision, noting that evidence suggested that few customers would see increased bills as a result of the shift to time-of-use rates. Will more regulators and utilities shift customers to time-of-use rates?