Fleet charging project timeline: how long to energisation

A confident number here would be a made-up number, and a schedule built on a made-up number is worse than no schedule at all.What is stable is the sequence, the dependencies and which phase controls the others. That is what the table below gives you, and it is enough to build a real schedule once you have three dated answers from your utility: capacity study turnaround, make-ready review cycle, and transformer lead time.Ask for those three in writing at first contact. They are the only inputs that turn this shape into dates.

Effort spent accelerating a phase that is not on the critical path is usually wasted. Effort spent removing a week from the utility path is worth several times as much.

Start it before you have selected hardware, before the design is drawn, and before the port count is final. The load letter can carry a range and a stated managed maximum. A utility that hears from you early enough to put the project into its planning cycle is a different utility from one that hears from you when the contractor is mobilised.It is also the conversation that reorders everything else. The answers about existing capacity, the cost of a new service and the transformer lead time will change your port count, your voltage, possibly your site and certainly your dates. Making those decisions before the utility answers means making them twice.Ask in the same conversation which rate schedule applies and whether an EV-specific commercial schedule exists. That is an operating-cost question with a long tail, and the account representative is the person who knows.

Design to the basis the study is likely to confirm, and hold loosely the parts most likely to change. Redrawing after a capacity answer is normal; redrawing three times because the design was frozen too early is not.The permit set can be submitted while equipment is on order, and in most jurisdictions the review is not the constraint.There is no reason for pedestals to sit in a yard for four months, and a good reason not to: warranty clocks and firmware support windows sometimes start at shipment.The make-ready application runs against design, but only so far. Most programs need a design package to review, so the application cannot precede the design entirely — and construction generally cannot precede the approval. That ordering constraint is the one that catches projects out.What does not run in parallel is the transformer. It is a long-lead item on someone else's factory queue, and nothing you do on site shortens it.

Measured that way, a depot really is a few weeks of work, and the number is not dishonest. It is answering a different question.The question a fleet operator is asking is when vehicles can charge. That clock starts at the first conversation with the utility and includes every phase in the table above.The gap between those two clocks is where fleet electrification programs fail. Vehicles get ordered against the construction timeline, arrive against the utility timeline, and sit in a yard with nowhere to plug in.So sequence it the other way: order vehicles against the energisation date the utility gives you, with contingency, and treat the construction schedule as the short pole it is.

Make-ready approval arriving after construction started. Many programs disqualify work begun before the pre-approval date, which turns a scheduling shortcut into a lost incentive.An incomplete first submittal to the utility. A load letter missing the vehicle schedule, the port count or the in-service date goes to the back of a queue you have already waited in.Redesign after the capacity study. If the study says the existing service cannot carry the design, the design changes and the permit set changes with it.Correction rounds at inspection — usually short, occasionally not, and much more likely where the adopted code edition differs from the one the design assumed. Confirm the adopted edition with the authority having jurisdiction before the drawings are stamped.The compression levers, in order of usefulness: start the utility conversation first, get the transformer lead time in writing before design freeze, submit a complete make-ready application before any construction begins, and build the underground work for the full plan while the trench is open so there is no second project to schedule.