Green energy has taken another positive step forward as Sanyo has announced that it will begin mass producing a new type of solar cell. These new solar cells, dubbed HIT cells, boast the world’s highest cell conversion efficiency of 21.6%. It’s worth noting that Sharp showcased a solar cell that was capable of 42.1% efficiency a while back, but that was just a prototype. Sanyo’s HIT-N240SE10 is capable of 19% efficiency and was made by redesigning the tabs and using anti-reflection coated glass. The company is planning to begin sales of this in Europe in February 2011.