Commercial EV charger installation in Chicago.

Start with how the chargers will be used. A workplace, fleet yard, customer lot, and public charging site can need very different power levels even when they have the same number of parking spaces. Estimate how long vehicles remain parked, how much energy each vehicle needs, and when charging demand will overlap.

Then decide who may charge and who will manage access. A private fleet may need assigned vehicles and charging schedules. A workplace may limit access to staff. A public station may need payment processing, driver support, and station listing. These choices affect hardware, networking, cellular or internet service, signs, and operating fees.

Finally, decide what the first phase must support and what later phases may add. Planning conduits, panels, equipment space, and communications early can make expansion less disruptive. It does not mean every future charger must be purchased now.

Equipment is only one line. A useful budget separates charger hardware from the electrical, civil, utility, permit, network, and operating work required to place it in service.

Level 2 charging supplies AC power to the vehicle, where onboard equipment converts it for the battery. Commercial Level 2 equipment commonly connects to a building panel and works well when vehicles remain parked long enough to charge over several hours. That can fit employee parking, overnight vehicles, and other predictable dwell periods. The design still must account for simultaneous charging, panel capacity, cable routing, communications, and parking use.

DC fast charging performs the AC-to-DC conversion outside the vehicle. It is intended for drivers or fleets that need energy in a shorter stop. Higher power can bring larger conductors, dedicated distribution equipment, cooling needs, greater utility involvement, and a more complex equipment layout. It may also have a stronger effect on the facility's electrical demand and rate strategy.

Do not choose solely by the charger's maximum rating. The vehicle, battery condition, and other limits can affect delivered charging speed. Choose the lowest practical power that reliably serves the operating need, then confirm that the electrical and parking design can support it.

Two projects with the same charger count can require very different work. Electrical capacity and the route from the power source to the parking spaces often matter more than the number of units.

The assessment should document the existing electrical service, transformers, switchgear, panels, protective devices, metering, and known building loads. The team then compares available capacity with the proposed charging load. When every charger does not need full power at once, load management may help control charging within an established limit. That approach still needs a clear operating plan and compatible equipment.

The field review should also trace realistic feeder and communications routes. It should identify trenching, wall penetrations, structural mounting, bollards or other protection, signs, lighting, security, and restoration. Charger cords must reach vehicles without creating an avoidable conflict with traffic or walking paths. Equipment location should also allow service access.

The review ends with a basis of design: charger quantity and power, electrical assumptions, proposed locations, network needs, utility questions, permit approach, construction limits, and future phases. That document gives bidders a common scope. Without it, low bids may simply exclude work that appears later as a change.

The Chicago Department of Buildings states that a permit is required before most construction, demolition, and repair work begins. Its permit processes vary by project type. The city also provides an Express Permit Program for qualifying repair and small improvement work and a Self-Certified Permit Application Program for eligible projects where the design professional takes responsibility for code compliance.

Do not assume an EV charging project belongs in either pathway. Confirm the applicable process from the actual electrical and construction scope. Permit planning should identify the required drawings, responsible design professional, expected reviews, fees, and inspections before the installation schedule is promised.

Commercial charging continues after the electrical inspection. The owner needs a clear plan for station access, pricing, payment processing, uptime, software administration, driver support, warranty claims, repairs, and reporting. Networked equipment can provide controls and utilization data, but it can also bring subscriptions and reliance on a service provider.

Ownership terms should be reviewed with the same care as construction terms. Confirm who owns the chargers and collected data, who can change pricing or access rules, and what happens if a network agreement ends. A maintenance plan should also define response expectations and which party carries replacement parts.

Issue the same site information and performance requirements to every bidder. State who will use the stations, expected parking time, required energy, access rules, payment needs, first-phase quantity, and expansion goal. Include available electrical records and known construction limits. If the design is not complete, require each bidder to list assumptions in plain language.

Compare the installed system and its ongoing obligations. Review utility work, distribution equipment, protection, trenching, restoration, permits, inspection support, networking, software, warranties, training, and maintenance. A lower equipment price can lose its advantage if the solution creates avoidable service upgrades, high recurring fees, poor parts access, or difficult expansion.

Order long-lead equipment only after major electrical and utility assumptions are understood. Build a schedule around design, utility review, permit review, equipment delivery, construction, inspection, activation, and training. For an occupied facility, define parking closures, shutdown windows, temporary access, and restoration phases before work begins. A realistic schedule protects daily operations and makes responsibility visible.

A proposal should make scope gaps easy to find. Ask each bidder to show these items separately and explain any exclusions, allowances, owner-supplied work, or unresolved utility conditions.