SunPower–Honda solar module, 1994
In February 1994 this experimental solar module set a record for efficiency by converting nearly a quarter of the sunlight that shone on it into electricity. A team from SunPower Corp., Sandia National Lab, and EPRI were investigating ways to mass produce high-efficiency solar cells. To test their process, the team made the cells that Honda used to win the 1993 World Solar Challenge car race. Cells from that production run went into this panel—and it can still produce about twenty-six volts today.
Gift of Electric Power Research Institute; Smithsonian photo