Facing Facts About Solar


Distributed solar might be a game changer, but at what cost?

Fortnightly - June 2012

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

I told Reggie the same thing I tell everybody who asks me about rooftop solar—namely, PV has very exciting potential for the future, but it isn’t the most economical way to spend his energy dollar today. And that’s especially true for an off-grid system that gets little use. If he wants solar panels to support his green ideals, that’s fine. But he shouldn’t expect them to pay for themselves.

As it happens, Reggie is a green-minded person—with disposable cash—so my speech about economics didn’t deter him. And he explained that he’d already researched prices, and learned that our local Home Depot was offering to finance, install, and warrant rooftop solar systems manufactured by BP Solar at surprisingly low prices. What’s more, if he takes advantage of various incentive programs—including low-interest green loans, the state’s net-metering law, and a solar rebate offered by the local utility (Minnesota Power)—he can install a grid-tied rooftop solar system that should pay for itself in about 10 years. After that he should be in the black.

I congratulated Reggie on his research. Yet I couldn’t resist pointing out that while solar might be affordable for him, that’s only because the rest of us are helping to pay for it. Minnesota Power must maintain the grid 24 hours a day to support and integrate Reggie’s PV generation, but for every hour his panels will be generating power, his net-metered bill will subtract his share of the costs—leaving the rest of us to pick up the tab. And while the utility will finance the solar rebate programs to meet its obligations under the state’s renewable portfolio standard, it rolls those costs into everyone’s bills.

Going Postal

I was thinking about these facts as I was writing the CEO Forum for this issue (“Facing the Future”). In an interview for that article, NRG Energy’s David Crane talked about the “Post-Officization” of rate-regulated utilities in a world where rooftop solar [a wholesale technology] competes against retail power prices. Crane made a compelling point, but I wonder: can we—society—accept an outcome that makes the utility grid uneconomic? While people like my friend Reggie are living the green life and showing off their solar panels, will the rest of us be content to pay ever-higher utility bills?

In the short term, I think the answer is yes. Today the costs of net metering and RPS compliance remain modest, so PV investments make sense as part of a long-term R&D effort. As solar gets cheaper, it will contribute more to the important goal of diversifying America’s power portfolio with domestic, sustainable resources. That’s an effort worth subsidizing.


EES North America

While my friend is living the green life and showing off his solar panels, will the rest of us be content to pay ever-higher utility bills?


Whether subsidy levels are appropriate is another question, of course. In “Energy Subsidy Myths and Realities,” analysts Roger Bezdek and Robert Wendling attempt to penetrate the maze of government incentives, subsidies, and programs that contain the full scope of government investments in energy. Whether those programs are designed to harmonize with policy goals is a debatable question. And it might be a moot point, given the amorphous nature of U.S. energy policy. However, in the grand scheme of things, accelerating the development of PV could make a dramatic difference—ultimately for the better, we hope. And so, I told Reggie that I’m OK with paying for part of his PV panels, because they serve my long-term interests as a ratepayer and a citizen.

But then I also told him he could take that money and spend it more productively on other things that serve the same goals. For example, he could replace all his old light bulbs, appliances, and windows with more efficient models. That investment would pay for itself faster than PV panels, I’d bet. Or better yet, he could have his SUV crushed into scrap, and replace it with a used Honda Civic. That would save a lot more energy and pollution, not to mention gas money.

Reggie didn’t like hearing these things, of course. None of them are nearly as cool as putting PV panels on his boathouse. But I figured that if his goal is to save the planet, he’d like to have the facts before he pulls out his checkbook.


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