▁sell ▁solar ▁pan els ▁or ▁solar ▁roof s ▁on ▁the ▁T es la ▁website . ▁ ▁Install ation ▁technology ▁Sol ar City ▁provides ▁techn ologies ▁for ▁mount ing ▁solar ▁pan els ▁on ▁ro o ft ops ▁developed ▁by ▁Z ep ▁Sol ar , ▁which ▁it ▁acquired ▁in ▁ 2 0 1 3 . ▁Z ep ▁is ▁best ▁known ▁for ▁invent ing ▁a ▁system ▁that ▁allows ▁P V ▁install ers ▁to ▁" s nap ▁together " ▁pan els ▁on ▁the ▁roof ▁more ▁quickly ▁than ▁other ▁installation ▁approaches , ▁in ▁order ▁to ▁short en ▁installation ▁time . ▁Z ep ▁Sol ar ' s ▁technology ▁elimin ates ▁the ▁need ▁for ▁mount ing ▁rails ▁on ▁many ▁roof ▁types . ▁ ▁Sol ar ▁roof ▁ ▁In ▁August ▁ 2 0 1 6 , ▁Mus k ▁announced ▁that ▁T es la ▁would ▁be ▁introdu cing ▁a ▁new ▁product ▁called ▁the ▁T es la ▁Sol ar ▁Ro of ▁where ▁the ▁phot ov olta ic ▁elect rical ▁energy ▁generating ▁devices ▁and ▁system ▁would ▁make ▁up ▁an ▁entire ▁roof ▁surface , ▁rather ▁than ▁merely ▁be ▁the ▁mount ing ▁of ▁solar ▁pan els ▁on ▁an ▁existing ▁roof , ▁as ▁solar ▁energy ▁systems ▁have ▁generally ▁been ▁designed ▁and ▁installed ▁during ▁the ▁early ▁dec ades ▁of ▁terrest rial ▁solar ▁power . ▁He ▁stated ▁" It ’ s ▁not ▁a ▁thing ▁on ▁a ▁roof . ▁It ▁is ▁the ▁roof ." ▁In ▁late ▁October ▁ 2 0 1 6 , ▁ass orted ▁styles ▁of ▁solar ▁roof ▁t iles , ▁made ▁of ▁a ▁type ▁of ▁glass , ▁were