Solar Ray (stylized and subtitled as SOLAR RAY Hirasawa best recycling album Recycled by P-MODEL kernel) is a 2001 remix album by Susumu Hirasawa.

It is the centerpiece of "Hirasawa Energy Works", a project to produce music in an ecologically friendly way.

In 2000, Hirasawa switched from a gasoline-powered car to a hybrid electric, developing an interest in sustainable energy, specifically in the idea of using solar power to make music.

[1][2][3] He purchased two 120-watt solar panels, outfitted his home studio to be powered by them, and connected two car batteries to store additional energy, which combined allowed Hirasawa to work for 12 hours.

[5] Solar Ray features remixes of songs from previous albums in the energetic technopop style of Hirasawa's former band, P-Model.