Solar Cell

Solar Cell - Cosmic Anomaly
Class 3 Complex Site
NPCs - Hostiles

First Encounter
Awakened Upholder x1 (Cruiser Class - )
Emergent Preserver x1 (Frigate Class - )

Killing the Emergent Preserver triggers the next spawn.

First Wave
Awakened Defender x3 (Cruiser Class)
Awakened Upholder x1 (Cruiser Class - )
Emergent Defender x2 (Frigate Class - )
Emergent Upholder x2 (Frigate Class - )

Killing the Emergent Upholder triggers the next spawn.

Second Wave
Awakened Defender x2 (Cruiser Class)
Sleepless Preserver x1 (Battleship Class - )
Sleepless Defender x1 (Battleship Class - )

(Source)