REC Solar is the borrower while Reliance New Energy Solar is the guarantor, as per local media reports.
The loan is a rare acquisition financing from RIL which opted for term loans instead of a short-term bridge facility, media reports said.
In October, Reliance announced its acquisition of 40 per cent stake in Sterling and Wilson Solar, a Shapoorji Pallonji group.
The acquisitions is part of RIL's goal to become a net carbon zero company by 2035 with an investment of $10 billion.