Rahul Prithiani, director of industry research at CRISIL Research, hints that lower PLFs will adversely impact returns for 18GW of competitively bid plants that have levelised tariffs of less than Rs. 3.1 per unit – a level needed to earn 15-16 per cent return on equity. Of this, close to 7 GW which have, been aggressively bid at levelised tariffs of below Rs.2.9 per unit, are at a high risk of being unviable.