SunPower back contact, back junction solar cells have several advantages compared with conventional solar cells:

• Higher voltage due to reduced metal/silicon interface area (contact made through small holes in insulating oxide)
  
• Higher current since no light is blocked at the front surface by electrical contacts
  
• Superior aesthetics, with no highly visible reflective gride lines and metal interconnect ribbons
  
• Ease of panel assembly since all electrical contacts are in-plane behind the cell circuit.