Tesco made the pledge as part of a plan to become a zero-emission firm by 2050. By 2030, it wants to reduce emissions from its stores and distribution centres by 50% per square foot.
To achieve its renewable electricity goal, the retailer has set an interim target of sourcing 65% of its power from renewables by 2020.
Tesco said it would switch its UK and Ireland operations to renewable electricity from this year. The company has also joined the RE100 initiative for corporate firms.
"We aim to expand our renewable electricity mix across the group to include over 50% from grid power purchase agreements (PPAs) and on-site generation by 2030. This plan balances price stability, cost-effectiveness and support for creating additional renewable capacity," Tesco said.
Tesco has operations across Asia and central Europe, as well as being one of the largest retail chains in the UK and Ireland.