Solar

Although today microgrids serve a tiny fraction of the market, that share will grow as costs fall. Utilities can benefit if they plan ahead.

(July 2012) Thanks for your enlightening editorial about the problems of feed-in tariffs for photovoltaic installations and the distortions they are causing in cost responsibilities among electric utility customers. While these issues are an immediate and growing concern, an entirely different set of problems will emerge over the next decade as the share of renewables in total generation approaches the high levels being dictated by most regulatory authorities.

A growing wave of rooftop PV projects is starting to look ominous to some utilities. Will lawmakers accept utilities’ warnings at face value—or will they suspect they’re crying wolf?

Utilities are testing options for adding solar capacity to existing steam power plants. Concentrated solar thermal boosters increase plant efficiency and reduce emissions, while helping utilities to cost-effectively meet renewable mandates.

When MidAmerican Energy Holdings issued $850 million in bonds in February 2012 to finance construction of the massive 550-MW Topaz Solar photovoltaic (PV) farm, it raised more than a few eyebrows in the financial and renewable energy communities.

My friend Reggie recently asked me for advice about installing photovoltaic (PV) panels on the roof of his boathouse on the river. It has no electricity now, but he wants just enough PV to power a few lights, an automatic garage door opener, and the occasional power tool. I told Reggie the same thing I tell everybody who asks me about rooftop solar: it's exciting but still expensive. Then Reggie explained why I was wrong.

Whether it deserves it or not, the solar energy industry can’t count on continued government largess, thanks in part to the Solyndra mess. But in the end, Solyndra’s demise might be exactly what the industry needs to wean itself off heavy subsidies and become a mainstream resource.

As solar generation systems grow in number and size, they will pose new challenges to the electric grid. Integrating solar energy calls for applying sophisticated monitoring and synchronization technology, to allow operators to keep track of operating parameters and ensure as much solar electricity as possible can be integrated into the grid.

The industry has struggled to craft a feed-in-tariff (FiT) structure that works for solar generators and utility customers, with mixed success. But now, the California Public Utility Commission might have found an approach that other states can replicate. CPUC’s FiT mechanism recognizes the value proposition of solar energy, and uses market forces to drive economic improvements, especially for distributed solar projects.

With recent scale-up in both photovoltaic and concentrated thermal facilities, solar energy is nearing cost parity with wind and even some fossil generation sources. And with development models evolving to help companies manage technology risks, solar power has become an attractive investment opportunity—not just for tax-equity players, but also for utilities.