The cost that stops most charging projects is not the chargers. It is the supply upgrade, which can exceed everything else combined and which brings a timeline the project does not control.
Several measures can avoid it, and they are worth trying in order of cost and disruption rather than all at once.
First, establish that the upgrade is actually needed
The requirement is frequently derived from an unmanaged worst case: every bay at full rate simultaneously. Measured against the building's real peak and a managed allowance, the same bay count often fits.
This costs a logger and an assessment, and it resolves a meaningful proportion of projects without any further measure.
Managed charging
Sharing a fixed allowance among active bays lets a site install considerably more points than it could serve simultaneously. On sites with long dwell, where vehicles finish and stop drawing, the practical effect is that most bays deliver a full charge overnight regardless.
This is the single highest-value measure, and it is the reason load management is a commercial feature rather than a technical refinement.
Lower the per-bay rating
More bays at a lower rate frequently serves more drivers than fewer at a higher rate on the same connection. Where dwell is measured in hours, the higher rate delivers no additional energy to a vehicle that was going to be full anyway.
Specifying the highest available rating by default is a common way to consume supply capacity for no delivered benefit.
Shift charging away from the building peak
Where the load can be scheduled, moving it outside the building's peak converts a capacity problem into a timing one. This works well for fleet depots and overnight residential charging and poorly for workplace charging, which coincides with the peak by nature.
It also reduces exposure to demand-based tariff components, which is a separate and sometimes larger saving.
Use storage as a buffer
A battery charged during low-demand periods and discharged to support charging during peaks can defer a supply upgrade. It carries its own capital cost and its own maintenance, and it makes sense where the upgrade is exceptionally expensive or slow.
It is rarely the first answer and occasionally the only one, particularly on constrained urban sites.
Order to try them in
Most sites resolve within the first three. Reaching the sixth having tried none of the others is how projects get abandoned on cost.
- Measure the real headroom before accepting an upgrade requirement.
- Apply managed charging.
- Reconsider the per-bay rating against actual dwell.
- Schedule charging away from the peak where the use case allows.
- Consider storage where the upgrade is genuinely prohibitive.
- Upgrade the supply, if none of the above closes the gap.