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Table 4 Slack that would be left in the test year from wind and solar projects optimized to leave 10% slack in the training years

From: Can wind and solar replace coal in Texas?

Test year

Training years

Slack in test year

Solar sites

Wind sites

Cost (Billion $)

2009

2010–11

11.9%

42

71

2.75

2010

2009, 11

11.1%

39

72

2.77

2011

2009–10

7.5%

44

74

2.91