Shared charger planning: installation steps

What to take away

Most shared charging schedules are drawn as a straight line: survey, design, permit, order, build. That line is why these projects take a year. Very little of it has to happen in that order.

Three threads that start together

The electrical thread runs the site survey, the electrical capacity check, circuit routes, and the load calculation. A licensed electrician or professional engineer signs off on the calculation and the panel work; the authority having jurisdiction sets the rules they work to.

The approvals thread covers the utility contact, program applications, the building department enquiry, and the permit submission.

The people thread settles the access model, pricing, resident rules, and board approvals.

All three begin on day one. The electrical thread cannot finish without decisions from the people thread, and approvals cannot finish without the design, but none of them has to wait to start.

Start the utility conversation before anyone has drawn anything. The utility's queue is the longest single item on the calendar, and its answer can change the design. Where that call sits in a full installation sequence puts it near the front for exactly this reason.

The installation steps, in order

Planning runs in parallel. The work on site does not. Whatever the schedule looks like, the physical build follows one order.

First, the load calculation and the capacity check. A licensed electrician or professional engineer compares what the existing service can carry with the new EV load, using Article 625 of the National Electrical Code for the equipment and the load-calculation methods in Article 220. If the service cannot carry the ports you want, the answer is a service or panel upgrade, or a load-management system that reduces charging when building demand peaks.

Second, the panel and service work: breaker space or a new subpanel, conduit and conductors from the panel out to the parking area, and the upgrade itself if one is needed. Conduit runs surface-mounted inside a garage and in a trench between the building and an outdoor lot.

Third, mounting and wiring: Level 2 equipment, 208/240 volts, on a wall or on a pedestal, networked over Wi-Fi or cellular. Networked units commonly speak the Open Charge Point Protocol, which keeps the building from being locked to one software vendor.

Fourth, commissioning: energize the circuit, test every port, and run a short pilot with a few residents before opening it to everyone. The permit submission that gets you to that point usually carries a site plan, equipment cut sheets, the load calculation, and a single-line diagram. Plan check is where a missing item stalls the job, and the inspection that closes it is done by the same authority having jurisdiction.

The two dependencies that are real

Design before permit. Obvious, and unavoidable.

Access model before design. Less obvious, and the one people break. Whether you build dedicated ports, a shared pool, or a mix determines circuit layout, port count, and where equipment goes. The three models differ most in the work they create afterwards. Design before that decision is settled and you design twice.

Everything else treated as sequential is habit. You do not need the permit before ordering long-lead switchgear, if you accept the risk of a plan check comment.

Know where the money stops being reversible: a deposit is usually that point. You do not need the design before applying to a utility program that allows early applications.

You do not need board sign-off on hardware before opening the utility conversation.

Who chases what

Give each thread a named owner whose job is to notice when it has stalled.

Threads do not fail loudly. The utility does not call to say your enquiry is sitting unanswered. The program application does not announce that it needed a document. Without a weekly check, a thread can sit dormant for a month before anyone notices.

Workplace charging programs run into the same pattern. The workplace charging technical assistance material from Clean Cities exists largely to give one person a checklist to work from, and that coordination structure transfers directly to a residential building.

Telling residents, three times

When you decide to investigate. Short and honest: we are looking at this, here is the rough timescale, we will report back. This kills the rumor that nothing is happening.

When the plan is decided. What is being installed, where, who may use it, and what a session costs. Objections should surface here, while they can still be accommodated.

The day before work starts. Which bays are unavailable, for how long, and where to park instead. This message decides whether residents experience the project as organized or as an imposition.

Skipping the middle one is the common error. Residents who first hear details when a crew arrives will find something to object to, and they will be right that nobody asked them.

Where to get help if the threads are too many

On a small installation, a property manager can hold all three threads. On anything larger, or with a volunteer board, technical assistance is often free.

The Joint Office of Energy and Transportation maintains technical assistance resources aimed at exactly this coordination problem, and much of that help is free. Utilities frequently run make-ready programs that cover part of the wiring from the service to the charger, and the Department of Energy's Alternative Fuels Data Center lists state incentives and utility programs by location. Finding out what yours offers costs a phone call.

Who pays for what

Capital costs land on the owner or the association: reserves, a special assessment, or a line in the operating budget. Ongoing costs land on drivers, on dues, or on both, depending on whether the building sets a price per session.

Some buildings hand the whole project to a network operator that owns the equipment and bills drivers per session or per kilowatt-hour. On the funding side, the federal Alternative Fuel Vehicle Refueling Property Credit, claimed on IRS Form 8911, can offset part of the equipment and installation cost. Its eligibility rules are specific, so confirm them before you count on it.

A realistic parallel schedule

Construction is days. Commissioning is about a week, including a small pilot.

Run the same project in series, each stage waiting on the last, and the difference is months rather than weeks. What costs these projects time and money is where the delays sit; running the comparison that feeds the design is the step most likely to stall a committee.

Common questions

Is ordering before permit approval reckless?

It is a calculated risk. For standard equipment with long lead times it is often worth taking. For anything a plan check might change, wait for the approval.

Who should own the utility relationship?

One person, and preferably not someone whose seat turns over with the board. Continuity matters more than seniority here.

What if the access model cannot be agreed?

Then the project is not ready to design. Time spent resolving it is not delay. Designing around an unresolved question is.

How much notice do residents need before construction?

A week for planning, and a reminder the day before. Parking disruption generates the complaints, not the work itself.