The U.S. Department of Energy is offering vouchers of $50,000 to $300,000 that will let small clean tech innovators obtain help from federal energy research labs. The $20 million federal initiative is designed to help small businesses that are developing clean energy tech for advanced manufacturing, buildings, vehicles, wind, water, bioenergy, fuel cells, geothermal and solar. Five national energy laboratories will provide vouchers to more than 100 small clean tech innovators, so they can access the labs’ expertise and tools to test, validate, and introduce new products, expand their businesses, and grow the clean energy sector.