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New manufacturing techniques could cut solar power costs by 20 percent.
The solar industry says incremental advances have made transformational technologies unnecessary.
A simpler design could reduce the cost of solar power generated by concentrating sunlight on Stirling engines.
A new solar-cell design could cut costs and is suitable for large-scale flexible panels.
A bill before Congress may prove a costly way to reduce greenhouse gases.
A startup is making thin-film solar cells on flexible steel sheets.
A new printing method could cut costs and produce more-precise features.
Skyline Solar, a new startup, is combining conventional technologies to lower solar-power costs.