| | Cases | Budget limit ($) | Energy savings (kWh) | Percentage saved over target | IRR | Payback period (months) | NPV ($) | Maintenance cost ($) | Total investment ($) |
| | Fixed schedule | 20,000 | 1,167,215 | 11.99% | 72.15% | 18.72 | 51427.78 | 19,986 | 40,678 | | Optimal schedule | 20,000 | 1,190,464 | 14.22% | 76.23% | 16.92 | 52949.3 | 19,998 | 40,690 | | Fixed schedule | 40,000 | 1,670,773 | 60.30% | 79.20% | 18.12 | 68393.86 | 39,987 | 60,679 | | Optimal schedule | 40,000 | 1,702,041 | 63.31% | 79.27% | 17.64 | 70076.16 | 39,986 | 60,678 | | Fixed schedule | 65,000 | 1,829,741 | 75.56% | 78.81% | 18.64 | 70608.34 | 52,382 | 73,074 | | Optimal schedule | 65,000 | 2,001,191 | 92.01% | 80.44% | 17.28 | 77670.84 | 58,046 | 78,738 |
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