While President Bush is on his way to confronting the country’s addiction to oil: He’s being one upped by Republican governors promoting solar power. In his State of the Union address, Bush said he would increase the federal government’s research budget for solar power to $150 million, but the money will come out of other renewable energy projects. Meanwhile, Gov. Arnold Schwarzenegger has pledged a million solar rooftops in
Conservative politicians determined to embrace renewable energy may sound like an environmentalist’s dream world, but there’s a catch. Government money calls at the worst time in the solar industry’s economic cycle. In the last two years, the price of polysilicon, the basic material for most panels that turn photons from the sun into electricity, has more than tripled because of overseas demand. Polysilicon is made from silica, a mineral that’s cheap but that must be refined and processed. If the new subsidies were delayed by a couple of years, there would be time for new polysilicon factories to come online, and the government and solar eager homeowners would save a big chunk of money.
Another reason to wait out the polysilicon price bubble is that the high prices are doing wonders for alternative solar power technologies that use less polysilicon, or none at all. Several recent scientific advances have brought other materials to the efficiency levels of polysilicon. Firms that are closet to market, have some production that has already started, in the thin-film photovoltaic cell. Instead of polysilicon, and it can be made on flexible rolls, which means it’s cheaper to produce than a polysilicon cell. If these technologies fulfill their laboratory promise, they’ll offer higher efficiency for less money.
It’s too bad that the timing of
In the meantime, if politicians want to spend wisely to promote power, they can invest in "big solar" solar power plants that wou8ld cover hundreds of square miles of desert, producing energy on a massive scale with mirrors that concentrate the heat of the sunlight to produce electricity. This technology has recently been able to produce electricity at a cost that’s almost with the same as fossil fuels (about 6 cents per kilowatt hour). The only raw materials needed for big solar plants are steel and aluminum, neither of which is priced high at the moment. Several southwestern utilities are already building such plants. The utilities would add more if state governments were to help fund them.
So what do you do if you’re a sunny state homeowner with an urge to go solar and you’re being offered an intoxicating subsidy? In the short-term, the most cost effective choice is probably a solar water heater. Though decidedly low tech, these systems are eligible for most state subsidy programs and promise to immediately shave 15 percent off most homeowners’ energy bills. In a couple of years, when the price of polysilicon comes down and alternative technologies come to market, you can spring for a set of solar panels for your roof.