Solar Barrage is a skill located in the Dawn's Wrath (which can be found in the Templar skill tree). Solar Barrage is a morph of
Solar Flare.
Solar Barrage deals the following types of damage: Magic Damage. Which means that it gets buffed by the following blue champion point trees: Elemental Expert, Elf Born, Master at Arms, Spell Erosion. Also the following red champion point trees protect against this skill: Elemental Defender, Iron Clad.
ESO Skillbook