This compares what the Technology Committee recommended (see https://www.fortysixtwenty.tech/2022/10/04/4620-technology-committee-ev-charging-station-recommendations/ which is what the board authorized for a Not To Exceed estimate) and an estimate that was actually provided with a date of 8/31/2022. This estimate was evidently provided to management and directly to at least one board member but not to the chair of the committee. That board member then provided it to the committee. The committee and the chair had no chance to review it prior to this disclosure. Note that the board had directed that management include the chair of the committee in getting the estimate, which was not done. The 8/31 estimate bears no relationship to the committee’s unanimously approved recommendation for an NTE estimate or the direction of the board.
| Request | Estimate of 8/31/2022 | Comments | |
| Total number of supported Level-2 chargers | 20 | 83 | There are no data to support the need to be able to support 83 charging stations at this time. Planning out this much excess capacity was explicitly advised against by the committee since charging technology is changing rapidly and Level-2 chargers will probably be obsolete by the time additional capacity is desired. |
| Total current | 200A, with options for 400A and 600A | 3600A total, or 18 times the committee request | The 8/31 estimate was sized to provide sufficient capacity for all chargers to be operating simultaneously all of the time, which is absurd. |
| Charging stations | Not to be included | Not included | |
| Total cost | ? | $1,014,120, not including contractor’s bonds, permit and inspection fees. |
* EverCharge gives this for the amperage requirements for their smart chargers:
10 chargers – 125A
20 – 200A
30 – 250A
50 – 400A
75 – 600A
100 – 800A
200 – 1200A
300 – 1600A
400 – 2000A
600 – 2500A
1000 – 3000A
1500 – 4000A
2000 – 5000A
The amount of capacity in the 8/31 estimate assumes ‘dumb’ chargers that must all be able to run simultaneously at full load (what is technically called a 100% duty cycle), which is not what the committee requested for the estimate. Since a level-2 charger requires approximately 40A, the calculation is 40A per Level-2 charger × 83 chargers = 3320A