While the early albums have pronounced industrial, esoteric darkwave and a touch of medieval influences, with time their musical style matured, embracing multi-faceted sonorities between neofolk, experimentalism and ballad songs.

The albums, that include also instrumental tracks, are characterized by a significant switch and mix of genres, making Ordo Equitum Solis' music unusual, various, intimistic and hard to describe.

Distinguishing features are Leithana's voice, Deraclamo's folk guitar, lyrics in various languages (English, French, Latin, Italian), highly-emotional melodies, experimental effects, romantic and decadent atmosphere, and remarkable, sometimes provocative arrangements.

In addition to Planetes, the band's revival resulted in the release of the mini-album Signs, the double CD compilation Octo, the album Metamorphosis - Personam Impono and the 7 inch vinyl picture-disc A Divine Image.

Also, Ordo Equitum Solis found that live-concerts were harder to get or unsatisfying, and the band finally decided to break up, immediately after their concert at the Wave-Gotik-Treffen in Leipzig on 3 June 2001.

Ordo Equitum Solis is influenced by the gothic and post-punk London music scene of the 1980s, particularly by bands like Joy Division, SPK, Cocteau Twins, Bauhaus, Dead Can Dance, Clair Obscur, Virgin Prunes, Coil, Sol Invictus and Death In June.

The name of the band, which literally means "The Order of the Knights of the Sun" in Latin, was coined by Deraclamo, and was meant to underline a certain vision of the world, willingly anachronistic yet strong and current in the 1990s.

The use of the Latin language as well as the look of the band represent some of the innovations introduced by Ordo Equitum Solis, which would be extensively reused in the gothic and alternative music scene.