The meeting is being organised to mark the centenary of “Kayal samaram”, a protest by the community against denial or right to organise themselves.
According to community chroniclers, a group of Pulaya community members made a flotilla of boats and held a meeting in the backwaters off Kochi about a century back.
The BJP is projecting the invitation extended to Modi by the outfit as a sign of his increasing acceptability among the backward classes.
Last year, Modi had spoken at the Sivagiri Mutt at Varkala, run by followers of Sree Narayana Guru, the 20th century spiritual leader and social reformer who hailed from the Ezhava community and also the Amrita Mutt of Mata Amritanandamayi Devi at Vallikkavu.