| Comparision of E-8 vs E-7 billing rate schedules for our household | |||||||||||
| For June 19, 2003 through June 17, 2004 we used an average of 45KWH/day and would have saved roughly $500 if we had been on an E-7 schedule instead of the E-8 billing rate schedule that we were actually on. | |||||||||||
| Surcharges apply equally to the KWH whether on the E-8 or the E-7 schedule so they were excluded from the analysis. | |||||||||||
| The 10% legislated reduction and the 5% tax would throw off the numbers by about 5%, but were not included. | |||||||||||
| If we went from 45KWH/day back to 80KWH/day with the additional power spread evenly 24x7 how much of the $500 do we lose? | |||||||||||
| added KWH/day | Season | seasonal days/yr | peak vs off-peak hrs /wk | peak vs off-peak % usage | KWH/yr | Baseline KWH rate E-8 | Baseline KWH rate E-7 | $/yr E-8 | $/yr E-7 | $ E-7 costs more than E-8 | |
| 35 | Summer | 184 | Peak | 30 | 18% | 1150 | $0.12017 | $0.31524 | $138 | $363 | |
| off-peak | 138 | 82% | 5290 | $0.12017 | $0.08515 | $636 | $450 | ||||
| 35 | Winter | 181 | Peak | 30 | 18% | 1131.25 | $0.07308 | $0.11636 | $83 | $132 | |
| off-peak | 138 | 82% | 5203.75 | $0.07308 | $0.08851 | $380 | $461 | ||||
| Annual | 365 | 12775 | $1,237 | $1,405 | $168 | ||||||
| How many additional KWH/day (spread evenly 24x7) to offset $500 of E-7 savings? | |||||||||||
| added KWH/day | Season | seasonal days/yr | peak vs off-peak hrs /wk | peak vs off-peak % usage | KWH/yr | Baseline KWH rate E-8 | Baseline KWH rate E-7 | $/yr E-8 | $/yr E-7 | $ E-7 costs more than E-8 | |
| 104 | Summer | 184 | Peak | 30 | 18% | 3417.14 | $0.12017 | $0.31524 | $411 | $1,077 | |
| off-peak | 138 | 82% | 15718.86 | $0.12017 | $0.08515 | $1,889 | $1,338 | ||||
| 104 | Winter | 181 | Peak | 30 | 18% | 3361.43 | $0.07308 | $0.11636 | $246 | $391 | |
| off-peak | 138 | 82% | 15462.57 | $0.07308 | $0.08851 | $1,130 | $1,369 | ||||
| Annual | 365 | 37960 | $3,675 | $4,175 | $500 | ||||||
| How many additional KWH/day (all during peak hours) to offset $500 of E-7 savings? | |||||||||||
| added KWH/day | Season | seasonal days/yr | peak vs off-peak % usage | KWH/yr | Baseline KWH rate E-8 | Baseline KWH rate E-7 | $/yr E-8 | $/yr E-7 | $ E-7 costs more than E-8 | ||
| 11.44 | Summer | 184 | Peak | 100% | 2104.96 | $0.12017 | $0.31524 | $252.95 | $663.57 | ||
| off-peak | 0% | 0 | $0.12017 | $0.08515 | $0.00 | $0.00 | |||||
| 11.44 | Winter | 181 | Peak | 100% | 2070.64 | $0.07308 | $0.11636 | $151.32 | $240.94 | ||
| off-peak | 0% | 0 | $0.07308 | $0.08851 | $0.00 | $0.00 | |||||
| Annual | 365 | 4176 | $404 | $905 | $500 | ||||||
| What ratio of peak usage to off-peak usage will result in no difference between E-8 and E-7? | |||||||||||
| added KWH/day | Season | seasonal days/yr | peak vs off-peak % usage | KWH/yr | Baseline KWH rate E-8 | Baseline KWH rate E-7 | $/yr E-8 | $/yr E-7 | $ E-7 costs more than E-8 | ||
| 10 | Summer | 184 | Peak | 7.8% | 143.52 | $0.12017 | $0.31524 | $17.25 | $45.24 | ||
| off-peak | 92.2% | 1696.48 | $0.12017 | $0.08515 | $203.87 | $144.46 | |||||
| 10 | Winter | 181 | Peak | 7.8% | 141.18 | $0.07308 | $0.11636 | $10.32 | $16.43 | ||
| off-peak | 92.2% | 1668.82 | $0.07308 | $0.08851 | $121.96 | $147.71 | |||||
| Annual | 365 | 3650 | $353 | $354 | $0 | ||||||