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| S.no | Client Name and Address | Wind Turbine Model and capacity | Certification Scheme | Certificate Number | Validity up to | Present Status (Valid/ expired/ suspended/ terminated) |
| 1 | M/s. Suzlon Energy Limited, Tree Lounge, Level 0 One Earth, Opp.Magarpatta City, Hadapsar, Pune-411028 | S-60 / 1000 kW | TAPS-2000 | PTC-III-003 | Issued -Valid upto 30.06.2003 | Expired |
| 2 | M/s. Enercon (India) Limited, "Enercon Tower", A-9, Veera Industrial Estate, Veera Desai Road, Andheri (West), Mumbai - 400 053 |
E-30 - 230 kW | TAPS-2000 | PTC-I-005-R2 | Renewed - Valid upto 15.04.2005 | Expired |
| 3 | M/s. Suzlon Energy Limited, Tree Lounge, Level 0 One Earth, Opp.Magarpatta City, Hadapsar, Pune-411028 |
N-3335/350 kW and N-3330/300 kW | TAPS-2000 | PTC-II-002-R2 | Renewed - Valid upto 24.11.2005 | Expired |
| 4 | M/s. Chiranjjeevi Wind Energy Limited, No.26-A, Kamaraj Road,Mahalingapuram, Pollachi, Tamilnadu - 642 002 |
C2920 / 250 kW | TAPS-2000 | PTC-I-010 | Issued -Valid upto 30.09.2006 | Expired |
| 5 | M/s. Pioneer Wincon Private Limited, 30/1A, Harrington Chambers, 2nd Floor, "A"Block, Abdul Razaq, 1st Street, Saidapet, Chennai - 600 015 |
W 250/29 -250 kW | TAPS-2000 | PTC-I-008 | Issued - Valid upto 31.03.2007 | Expired |
| 6 | M/s. Vestas Wind Technology India Private Limited, 298,Rajiv Gandhi Salai, Sholinganalluar,Chennai - 600 119 |
NM 48/750 / 750 kW | TAPS-2000 | PTC-I-011-R2 | Renewed - Valid upto 25.08.2007 | Expired |
| 7 | M/s RRB Energy Limited, No.17, Vembuliamman koil street, K K Nagar(West), Chennai – 600078 | Pawan Shakthi - 600 kW /600 kW | TAPS-2000 | PTC-II-014-R12 | Renewed -Valid upto 31.03.2019 | Expired |
| 8 | M/s. Southern Wind Farms Limited, No.15, Soundarapandian Salai, Ashok Nagar,Chennai - 600 083 |
GWL 225 / 225 kW | TAPS-2000 | PTC-III-004-R16 | Renewed -Valid upto 30.09.2019 | Expired |
| 9 | M/s RRB Energy Limited, No.17, Vembuliamman koil street, K K Nagar(West), Chennai – 600078 |
V39-500 kW with 47m rotor / 500 kW | TAPS-2000 | PTC-II-001-R17 | Renewed-Valid upto 31.03.2019 | Expired |
| 10 | M/s. Siva Windturbine India Private Limited, 12-A, Kandampalayam, Perundurai-638052 Erode District, Tamilnadu, India |
Siva 250/50 and 250 kW | IS/IEC 61400-22:2010 | TC-1542-01/Rev.00 | 21.07.2026 | Valid |
| 11 | M/s.Southern Wind Farms Limited, No.14, First floor, Brindhavan Street Extension, West Mambalam,Chennai-600033, India |
GWL225 and 225/40 kW | IS/IEC 61400-22:2010 | TC-1543-02/Rev.00 | 26.07.2026 | Valid |
| 12 | M/s.Siva Windturbine India Private Limited, 12-A, Kandampalayam, Perundurai - 638052, Erode District, Tamilnadu, India |
Siva 225/40 and 225 kW | IS/IEC 61400-22:2010 | TC-1555-03/Rev.00 | 27.10.2026 | Valid |