BioSolar Inc., a publicly traded California company, says it’s come up with a way to build a better solar panel, with plastics made from plants.

I sat down recently with company CEO David Lee, both of us at keyboards, to discuss BioSolar’s plans for a plastic revolution in sun power manufacturing.

Lee’s protective backing is derived from cotton and castor beans, and costs 25 percent less than Tedlar, the petroleum-based film made by rival DuPont, company officials say. Lee, an electrical engineer, founded the company in 2006.

Q: What makes BioSolar different from other solar companies in the United States?

Lee: BioSolar is developing a technology to produce bio-based photovoltaic (PV) components from renewable plant sources that will reduce the cost per watt of PV modules. BioSolar will gradually replace the petroleum-based portions of the PV module and do so at a substantial cost savings.

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The Australian government plans to build the world’s largest solar power station, a 1,000-megawatt plant that would generate three times as much electricity as the world’s largest solar electric plant, now located in California, Prime Minister Kevin Rudd announced.

Preliminary plans call for the construction of four individual plants — two solar thermal plants that use mirrors to focus the sun’s heat on steam-generating pipes or towers and two plants that use photovoltaic cells. Over all, the proposed facility would cost about U.S. $1 billion, Rudd said, and would generate electricity equivalent to a large coal-fired power plant.

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