IPA: //ˌfoʊtəʊˈvɒlteɪɪk//
KK: /ˌfoʊtəʊvɔːlˈteɪɪk/
Relating to the generation of electricity from light, especially sunlight, through the use of certain materials that produce voltage when exposed to radiant energy.
The new building is equipped with photovoltaic panels to harness solar energy.
Photovoltaic → It is formed from "photo-" (from Greek "phōs", meaning light) and "voltaic" (from Italian "volt", named after Alessandro Volta, meaning related to electric potential). The word "photovoltaic" refers to the conversion of light into electrical energy.
Think of 'light' ('photo-') being transformed into 'electricity' ('voltaic') — that's what photovoltaic means.
No commonly confused words.