Complex sentence: As of 2007,165 MW of capacity were installed in Japan, and NGK has announced in 2008 a plan to expand its NaS factory output from 90 MW a year to 150 MW a year.
Split into simpler sentences: As of 2007,165 MW of capacity were installed in Japan. NGK announced in 2008 a plan to expand its NaS factory output from 90 MW a year to 150 MW a year.