It sounds like you’re referring to a course code – possibly in industrial engineering, energy systems, operations research, or a related technical field (e.g., at institutions like the University of Tennessee, Knoxville, which uses IENE prefixes for engineering management).
With storage: Battery charges during low-cost hours (solar or cheap grid), discharges during peak. Peak shaving saves 200 kW × $15/kW × 12 months = $36,000/year. iene-315
[ PW = -1,000,000 + (114,000 - 10,000) \times (P/A, 8%, 20) ] [ (P/A, 8%, 20) = \frac{1 - 1.08^{-20}}{0.08} = 9.8181 ] [ PW = -1,000,000 + 104,000 \times 9.8181 = -1,000,000 + 1,021,082 = $21,082 ] It sounds like you’re referring to a course