Excess Solar Energy, CA
Los Angeles Times
California invested heavily in solar power. Now there's so much that other states are sometimes paid to take it
On 14 days during March, Arizona utilities got a gift from California: free solar power.
Well, actually better than free. California produced so much solar power on those days that it paid Arizona to take excess electricity its residents weren’t using to avoid overloading its own power lines.
It happened on eight days in January and nine in February as well. All told, those transactions helped save Arizona electricity customers millions of dollars this year, though grid operators declined to say exactly how much. And California also has paid other states to take power.
The number of days that California dumped its unused solar electricity would have been even higher if the state hadn’t ordered some solar plants to reduce production — even as natural gas power plants, which contribute to greenhouse gas emissions, continued generating electricity.
Solar and wind power production was curtailed a relatively small amount — about 3% in the first quarter of 2017 — but that’s more than double the same period last year. And the surge in solar power could push the number even higher in the future.
Why doesn’t California, a champion of renewable energy, use all the solar power it can generate?
The answer, in part, is that the state has achieved dramatic success in increasing renewable energy production in recent years. But it also reflects sharp conflicts among major energy players in the state over the best way to weave these new electricity sources into a system still dominated by fossil-fuel-generated power.
No single entity is in charge of energy policy in California. This has led to a two-track approach that has created an ever-increasing glut of power and is proving costly for electricity users. Rates have risen faster here than in the rest of the U.S., and Californians now pay about 50% more than the national average.
Perhaps the most glaring example: The California Legislature has mandated that one-half of the state’s electricity come from renewable sources by 2030; today it’s about one-fourth. That goal once was considered wildly optimistic. But solar panels have become much more efficient and less expensive. So solar power is now often the same price or cheaper than most other types of electricity, and production has soared so much that the target now looks laughably easy to achieve.
At the same time, however, state regulators — who act independently of the Legislature — until recently have continued to greenlight utility company proposals to build more natural gas power plants.
These conflicting energy agendas have frustrated state Senate Leader Kevin de Leon (D-Los Angeles), who opposes more fossil fuel plants. He has introduced legislation that would require the state to meet its goal of 50% of its electricity from renewable sources five years earlier, by 2025. Even more ambitiously, he recently proposed legislation to require 100% of the state’s power to come from renewable energy sources by 2045.
“I want to make sure we don’t have two different pathways,” de Leon said. Expanding clean energy production and also building natural gas plants, he added, is “a bad investment.”
Environmental groups are even more critical. They contend that building more fossil fuel plants at the same time that solar production is being curtailed shows that utilities — with the support of regulators — are putting higher profits ahead of reducing greenhouse gas emissions.
“California and others have just been getting it wrong,” said Leia Guccione, an expert in renewable energy at the Rocky Mountain Institute in Colorado, a clean power advocate. “The way [utilities] earn revenue is building stuff. When they see a need, they are perversely [incentivized] to come up with a solution like a gas plant.”
Regulators and utility officials dispute this view. They assert that the transition from fossil fuel power to renewable energy is complicated and that overlap is unavoidable.
They note that electricity demand fluctuates — it is higher in summer in California, because of air conditioning, and lower in the winter — so some production capacity inevitably will be underused in the winter. Moreover, the solar power supply fluctuates as well. It peaks at midday, when the sunlight is strongest. Even then it isn’t totally reliable.
Because no one can be sure when clouds might block sunshine during the day, fossil fuel electricity is needed to fill the gaps. Utility officials note that solar production is often cut back first because starting and stopping natural gas plants is costlier and more difficult than shutting down solar panels.