Ocon spent two-and-a-half seasons on the grid, mainly at Force India, before getting replaced by Lance Stroll for the 2019 season as the Canadian's father had become owner of the team.
The young Frenchman stuck around the grid as Mercedes' reserve and test driver, and it was announced in the final stages of last season he would be replacing Nico Hulkenberg at Renault for 2020.
At the presentation of the RS20 on Wednesday in Paris, Ocon gave his vote of trust in his new team.
"It's all about details in Formula 1 and I've seen quite a lot of details on the Renault R.S.20," the former F3 champion said.
"It's exciting to see the design but the next thing you want is to be behind the wheel and feeling what it's like."
Ocon's deal at Renault lasts until the end of 2021, meaning he'll be part of the French outfit into the new era next year.