"This new order underlines Senok Group’s strategic focus on wind energy," a Suzlon statement quoted Senok chairman Noel Selvanayagam as saying.
The new 21MW project will come up alongside the existing farm.
"This repeat order underlines Suzlon’s strong value proposition - offering expertise and flexible solutions - from concept to commissioning...," Tulsi R Tanti, C nanaging director, Suzlon Group said.
Sri Lanka used to approve wind farms up to 10MW on a standard power purchase agreement, but a recent decision by the power ministry said larger plants were encouraged as they were more cost-effective and plug-and-play wind energy parks would be set up for investors.