What commercial EV charger installation involves
Commercial EV charger installation is an electrical construction project, not an equipment delivery. The U.S. Department of Energy (DOE) states that installations must comply with local and state codes and be completed by a licensed electrical contractor, with a permit obtained from the local building authority before work starts. A typical project runs in this order:
- Site assessment. DOE’s planning guidance looks at the number and type of chargers needed now and later, distance to incoming electrical service, weather, internet or cellular coverage, and future expansion. The federal Joint Office site checklist adds lighting, visibility, vandalism prevention, accessibility and avoiding areas likely to flood.
- Charger selection. DOE describes Level 2 equipment as running on 208 volts in typical commercial settings, with output from 2.9 to 19.2 kW, and DC fast chargers as typically using a three-phase AC input with output up to 500 kW. Level 2 units commonly use the J1772 connector, DC fast units use CCS or CHAdeMO connectors, and the J3400 (NACS) connector works at all charging levels.
- Utility review. DOE advises engaging the utility early to identify service and equipment upgrades. NYSERDA’s DC fast charger guidebook notes that fast chargers require 480 volt service, often with trenching from the main switchboard, and that utility work can take many months where a new or upgraded transformer is required.
- Design and permit. Load calculation, single-line diagram, site plan and equipment specifications are prepared and submitted.
- Installation. Conduit, trenching or core drilling, conductors, overcurrent protection, disconnects, pads or pedestal mounts, bollards, signage and striping.
- Inspection and energization. The jurisdiction inspects the work before the charger is energized.
- Commissioning. Each port is registered with its network, test sessions are run, and payment and access settings are confirmed.
Codes, standards and requirements for EV charger installation
Licensing and permits. DOE notes that the permit process can require a site installation plan and approval from fire, environmental or electrical inspectors. The wiring follows the electrical code the authority having jurisdiction (AHJ) has adopted, and the AHJ decides which edition applies.
What a permit package can include. The model checklist in NYSERDA’s guidebook lists a site plan for commercial sites, manufacturer specifications including the UL listing, a single-line wiring diagram, an electrical load calculation showing existing panel size, existing load and proposed charging load, and a lockable disconnect in a readily accessible location for chargers over 60 amps or 150 volts to ground. The same guidebook reports that DC fast charger plan review can take one to six months.
State permit rules. DOE reports that California requires cities and counties to adopt expedited permit ordinances for charging stations, with completeness reviews within 5 or 10 business days and approval within 20 or 40 days, depending on whether a project has up to 25 stations or more. New York and New Jersey publish best-practice permitting guidance.
Equipment certification. DOE advises confirming that the manufacturer has tested the product with a certified testing body and that chargers comply with SAE standards such as J1772. ENERGY STAR certified chargers are safety tested by a nationally recognized testing laboratory. DOE also notes that chargers supporting OCPP version 1.6 or higher allow a site to change charging networks without major equipment upgrades.
Accessibility. The U.S. Access Board recommends at least two charging spaces with accessible mobility features, each at least 132 inches wide and 240 inches long with a 60-inch access aisle, operable parts no higher than 48 inches, connectors needing no more than 5 pounds of force, and cables that do not obstruct accessible routes. The Access Board notes that state or local codes may set a minimum number of accessible spaces and requirements for marking and signage.
Installer training. DOE’s procurement guidance points site hosts to the Electric Vehicle Infrastructure Training Program (EVITP) list of contractors trained and certified in charging equipment installation. Funding and incentive programs can set their own installer and equipment requirements, including Buy America compliance, so each program’s terms are checked before work is awarded.
Preventive maintenance schedule for new EV charger installations
Planned maintenance from the day of commissioning catches damaged cables and connectors early and builds an uptime record. DOE notes that repairs outside warranty can be costly and that maintenance contracts should state response time, repair time and required uptime.
| Task | Recommended frequency | Basis |
|---|---|---|
| Confirm each port is online and reporting to its network | Daily, through network monitoring | Facility First program default, adjusted per site |
| Inspect cables, connectors, holsters and pedestals for damage | Monthly | DOE AFDC (check parts periodically). Frequency: Facility First program default, adjusted per site |
| Clean housings, screens and connectors | Monthly, with the inspection | DOE AFDC (keep equipment clean). Frequency: Facility First program default, adjusted per site |
| Check that stored cables do not obstruct accessible routes and that cable management works | At every inspection | U.S. Access Board (cables must not obstruct accessible routes). Frequency: Facility First program default, adjusted per site |
| Check that access aisles and spaces are clear of wheel stops, bollards and cable slack | Monthly | U.S. Access Board. Frequency: Facility First program default, adjusted per site |
| Apply firmware and network updates | As released | Manufacturer instructions |
| Full preventive maintenance visit by a qualified electrician | Annually, or the manufacturer’s interval where shorter | Manufacturer instructions; Facility First program default, adjusted per site |
| Review warranty and network maintenance plan coverage | Annually and at renewal | DOE AFDC. Frequency: Facility First program default, adjusted per site |
The authority having jurisdiction, the manufacturer and the property’s insurer can require more frequent service, and each location’s schedule is set in its program and recorded on every visit. Ongoing service is covered on the EV charger maintenance page.
Signs a site is ready for new or additional chargers
- Existing ports are regularly occupied or staff and customers are waiting to charge
- Older units are non-networked and cannot take payment or report usage
- Chargers are out of warranty and failing repeatedly
- The current network cannot be changed without replacing hardware
- A lease, renovation or parking lot project opens the ground for conduit
Records to keep
- Site assessment, load calculation and single-line diagram
- Utility correspondence, service upgrade orders and energization date
- Permit, inspection approvals and electrical certificate
- Equipment specifications showing the listing, serial numbers and warranty terms
- As-built drawings with conduit routes and disconnect locations
- Accessible space layout, signage and striping photos
- Network contract, commissioning test results and the first maintenance date
How Facility First runs EV charger installation across a portfolio
- Request. The facilities team submits the locations, intended users and target number of ports.
- Triage and assessment. Facility First arranges site assessments and collects utility service details for each location, then compares locations on cost drivers and timing.
- Approval. Each scope is quoted against the client’s approval limits before work starts. See NTE meaning.
- Dispatch. A vetted local electrical contractor with the required licenses and insurance receives the work order and pulls the permit.
- Completion. The contractor documents trenching, wiring, inspection sign-off and commissioning with photos.
- Verification and invoice. Facility First checks the work against the scope, files the records on the location’s history in PostControl and invoices in one format.
What affects the cost of commercial EV charger installation
- Charger level, power output and number of ports
- Distance from the electrical panel or transformer, and trenching or boring
- Existing wiring and panel capacity, and any service upgrade
- Utility fees and transformer work
- Permit fees, plan review and inspection requirements
- Labor, which DOE identifies as the largest expense in a typical installation
- Accessible layout, bollards, signage and striping
- Network subscription, warranty and maintenance plan
- Incentives and any Buy America requirement tied to them
EV charger installation for retail stores, restaurants and offices
Retail stores. The Joint Office checklist favors highly visible, well-lit locations where customers can spend 2 or more hours at Level 2 chargers or around 30 minutes at DC fast chargers. Trenching is phased to keep entrances and accessible parking open during trading hours.
Restaurants. Charger level is matched to typical visit length and the electrical service available. Drive-thru lanes and pickup bays are kept clear of work zones.
Offices. DOE reports that Level 2 is the most common workplace charger and that employers often set sharing policies and time limits. Work in garages and tenant lots is scheduled with building management.
Frequently asked questions
Who can install a commercial EV charger?
DOE states that installations must be completed by a licensed electrical contractor under a local permit. DOE also points site hosts to the EVITP list of contractors trained and certified in charging equipment installation.
Is a utility upgrade always needed?
Not always. It depends on the existing service and the chargers planned, which is why DOE advises engaging the utility early. NYSERDA notes that DC fast chargers require 480 volt service and that utility work can take many months where a new or upgraded transformer is required.
How long does a permit take?
It depends on the jurisdiction. California sets review deadlines by project size, and NYSERDA’s guidebook reports DC fast charger plan review of one to six months.
How many accessible charging spaces are needed?
The U.S. Access Board recommends at least two spaces with accessible mobility features. State or local codes can set a specific minimum.
How often should a newly installed EV charger be maintained?
The Facility First program default pairs daily network checks with a monthly inspection and cleaning visit and an annual preventive maintenance visit, or the manufacturer’s interval where it is shorter.
Sources
- U.S. Department of Energy, Alternative Fuels Data Center: Procurement and Installation for Electric Vehicle Charging Infrastructure
- U.S. Department of Energy, Alternative Fuels Data Center: Operation and Maintenance for Electric Vehicle Charging Infrastructure
- U.S. Department of Energy, Alternative Fuels Data Center: Developing Infrastructure to Charge Electric Vehicles (charging levels and connectors)
- U.S. Department of Energy, Alternative Fuels Data Center: Permitting Processes for EV Charging
- U.S. Department of Energy, Alternative Fuels Data Center: Charging Electric Vehicles at the Workplace
- NYSERDA: DC Fast Charger Streamlined Permitting Guidebook
- U.S. Access Board: Design Recommendations for Accessible Electric Vehicle Charging Stations
- Joint Office of Energy and Transportation: Public EV Charging Site Selection Checklist