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(Image: Solar Impulse)
The HB-S1A HB-S1B is powered by 10,748 solar cells on its wings and 880 on the horizontal stabilizer; the next model, HB-S1B, will have about 15,000 cells on top. Every cell is handmade before being sent to Solar Impulse, where each is tested three times for voltage.
Cells are 135 microns and produce an efficiency of approximately 22.7 percent. Panels are made up of 300 cells that are cooked at 95 degrees for seven hours, then molded into the proper shape. The HB-S1B will be powered by 48 panels.