Solar Ray is a 2001 album that was composed by Susumu Hirasawa. It features remixes from some of his older songs and albums, such as Philosopher's Propeller and Aurora. These remixes are based upon his old band which disbanded in 1999, known as P-Model. Solar Ray's songs are energetic and have an electropop feel, reminiscent of P-Model's songs combined with Susumu Hirasawa's style. An interesting highlight of this album is that not only has he recycled some of his music, he has also used solar power, a renewable energy source to power his recording studio. In addition to using recycled material, the name of the album came from one of Susumu Hirasawa's previous works.