EV Charging Infrastructure for Commercial and Multifamily Properties

EV charging infrastructure on a commercial or multifamily property is a metering and money problem wearing an electrical costume. The circuits are not difficult. Deciding whose meter the energy comes off, who gets billed, who approves the spending and how the garage keeps operating while the work happens is the actual project.

We build charging infrastructure for condominium associations, homeowner associations, apartment ownership groups, office buildings, medical plazas, hotels and employers throughout Broward County, in Aventura, Golden Beach, North Miami, North Miami Beach and Sunny Isles Beach, and in Boca Raton and Delray Beach. Some of these are eight stalls in a residential garage built in 1978. Some are forty ports across an employee lot. This page is about how those projects are actually planned and built.

Who owns the electrons is the first question

Before conduit, before equipment selection, before a board vote, somebody has to answer a plain question: when a car draws power at this property, whose meter does it register on and how does that party get paid?

There are only a few honest answers, and each one produces a different building.

• Off the individual resident's own meter. Clean billing, no reimbursement scheme, no accounting. Electrically it is often brutal, because the unit panel may be six floors and three hundred feet of conduit away from the parking space.
• Off the house meter, with submetering and reimbursement. Short conduit runs, straightforward electrical work, and it hands the association an ongoing billing and collection obligation it did not previously have.
• Off a brand new dedicated service just for charging. The utility sets a separate meter for the charging equipment. Isolates the load completely, keeps it off the building's demand profile, and costs the most up front.
• Off the house meter with no measurement at all, paid out of common expenses like hallway lighting. Simple to build and, in our experience, the arrangement most likely to produce an argument at the next annual meeting.

We push every client to settle this before we design anything, because the answer determines feeder routing, equipment selection, panel location and the size of the electrical scope. EV charging infrastructure designed around the wrong billing model has to be redesigned, and choosing late is how that happens.

The shared meter problem in multifamily buildings

Most South Florida condominium buildings from the 1970s and 1980s were built with a bank of resident meters in a meter room and one house meter carrying corridor lighting, elevators, pumps, common area air conditioning and the garage. The garage lighting circuit is on the house meter. That is the only power that exists anywhere near the parking spaces.

So the physically easy path is to feed chargers from the house side. The moment you do, every kilowatt hour a resident's car consumes is being paid for by every owner in the building, including the ones who drive gasoline cars and have opinions about it. That is the shared metering problem in one sentence, and it is the reason most of these projects stall.

The second half of the problem is capacity. The house service in a mid-rise built forty years ago was sized for lighting, elevators, pumps and a few common area loads. It was not sized to add a hundred amps of continuous charging demand. We nearly always run a recording meter on the house service for a week or two before proposing anything, because the panel schedule describes a building that no longer exists and the recorded demand describes the one that does.

A third wrinkle shows up in older buildings specifically. Some of them have a house service that is already loaded by equipment added over the decades with no load calculation behind it. When we find that, the charging project turns into a service conversation first, which is honest information to have early rather than after the association has voted on a budget. That work is covered on our commercial panel upgrade page.

Submetering and revenue grade measurement

Once charging is fed from a common meter, somebody has to measure what each user consumed. There are two ways to get that number, and they are not equivalent.

Metering built into the charging equipment. Most networked charging stations meter their own output and report it to a software platform, which handles user authentication, session records and payment. For an association that wants residents to swipe a card or use an app and be billed automatically, this is the practical answer. The important question to ask the vendor is whether the internal meter is a revenue grade device, meaning it is built and tested to a recognized accuracy standard rather than simply displaying an estimate. If the association intends to bill people money based on that reading, it should be a measurement that would survive being questioned.

Separate submeters on the branch circuits. A metering device with current transformers on each charging circuit, independent of the charging equipment. This is what we install when each stall belongs to a specific deeded parking space and the association wants a permanent record tied to the circuit rather than to whichever charger is bolted to the wall this decade. It also survives an equipment change, which internal metering does not.

There is a legal dimension worth raising with the association's attorney rather than with an electrician. Reselling electricity by the kilowatt hour can be treated differently than recovering a cost, and how an association structures its charges matters. Our role is to install measurement that is accurate and defensible; how the association bills against it belongs to their counsel and their management company.

One practical note we make on every job: put the submetering current transformers where a technician can reach them without shutting down the garage. A metering cabinet in a locked electrical room with room to work is worth the small extra cost, because someone will eventually need to verify a reading a resident is disputing.

Spreading one feeder across many ports

The arithmetic that makes multifamily charging affordable is this: a car sits in a garage for twelve hours and needs four of them. Cars do not all need power at once, and a system that recognizes that can serve many more ports than its feeder could serve at full output.

A managed group of Level 2 stations shares an allocated amount of current. When one car is plugged in, it gets the full available power. When twelve are plugged in, the controller divides the available current among them and each one charges more slowly. Overnight, every car still finishes. The building never exceeds the ceiling the feeder and service were designed around.

What we set with the client before design:

• The site ceiling, meaning the total current the charging system is permitted to draw at any moment. This is a design input, chosen from the load study, not a number the equipment picks on its own.
• The allocation rule, which decides whether power is split evenly, given out first come first served, or weighted by how long a vehicle has been connected. Equal division is the least likely to generate complaints.
• The minimum per port, because dividing a feeder among too many simultaneous vehicles eventually produces a rate so low that cars stop accepting the charge and users decide the system is broken.
• What happens when the controller is offline, which we cover further down because it is the question inspectors and engineers ask and vendors gloss over.

Getting the ceiling right is where experience matters. Set it too low and the garage gets a reputation for being slow. Set it too high and the building's demand charges climb or the service runs out of room the first hot afternoon when the chillers and the chargers peak together. We size it against the recorded demand curve, not against the nameplate.

Pulling feeders through a garage that is already built

New construction gets conduit in the deck. Everything else gets surface raceway, and how it is run is what the board will actually look at when they walk the garage.

Most South Florida parking structures are cast concrete, which means we are anchoring to the underside of a deck or to columns, and every anchor is a drilled fastener into structure. Where post tensioned slabs are involved, cables have to be located before anything is drilled. That is not optional caution, it is a life safety issue and a structural one, and any contractor who does not raise it should not be doing the work.

The route decisions that matter:

• Run height and clearance. Conduit and equipment must stay above the required vehicle clearance and out of the path of anything taller than a sedan. Garages here have low ceilings and delivery vans.
• Physical protection. Anything a car can strike gets guarded. Bollards, wheel stops in the right position, or mounting the equipment behind the striping rather than in the swing of a door.
• Expansion joints, which must be crossed with fittings designed for movement. A rigid raceway bridged straight across a joint will pull itself apart.
• Drainage and washdown. Garage floors get hosed, and the lower level of a coastal garage floods. Equipment and boxes get mounted with that reality in mind.
• Fire separation. Penetrations through rated assemblies get firestopped with a listed system, and that detail gets inspected.

Salt air deserves specific attention in a garage within a mile of the beach. Open air parking structures in Hollywood, Hallandale and the barrier island communities are corrosive environments. We select conduit, fittings, hardware and enclosures for it, use stainless anchors, and avoid dissimilar metal contact that will produce galvanic corrosion in a few seasons. A charging installation is meant to last fifteen years, and cheap hardware in that atmosphere does not last five.

Designing the first phase so the fifth one is cheap

Almost no association installs charging for every space at once, nor should they. Demand grows, and spending reserve money on ports nobody uses is a bad decision. But the way most properties phase this work guarantees they pay for the same job repeatedly.

The expensive parts of a charging project are the feeder, the panel, the raceway and the labor of getting from the electrical room to the far end of the garage. The cheap part is the charging station itself. So the phasing that works is to build the expensive parts once, at full future capacity, and add equipment over time.

What that looks like in practice:

• A distribution panel sized and located for the eventual build-out, not for phase one, with real spare breaker space.
• The main feeder from the source to that panel sized for the ultimate load, or at minimum installed in a raceway large enough to be repulled without demolition.
• Empty conduit stubbed and capped at every future stall on the phase one route, with pull strings left in place and the stub locations documented on a drawing that goes in the association's records.
• Junction boxes and pull points placed along the run so a later branch does not require opening the entire raceway.
• Structural blocking, mounting backing or pedestal bases installed at future locations while the lift is already in the garage.

The marginal cost of stubbing a conduit while the crew is already working that bay is small. The cost of coming back, remobilizing, drilling structure again and closing parking spaces a second time is not. We put the phase two and phase three provisions in the phase one proposal explicitly so the board can see what they are buying and decide with real numbers in front of them.

Boards, reserves and the vote you actually need

The electrical scope is usually settled weeks before the governance is. EV charging infrastructure at a condominium is an association decision before it is a construction project, and that runs on a different calendar entirely.

The questions a board has to resolve, which we can inform but not answer:

• Is this a common element alteration requiring a membership vote, or something the board can authorize on its own? That depends on the governing documents and on how the equipment is characterized. Their attorney decides it, and the answer changes the timeline by months.
• Where does the money come from? Operating budget, existing reserves, a reserve line item added for future years, a special assessment, or a vendor arrangement where a third party owns the equipment and takes the revenue.
• Who owns the equipment after installation, and who is responsible for maintaining, repairing and eventually replacing it? Charging stations have a service life. A reserve study that includes the garage should include them.
• What is the policy for individual owners who want their own charger at their own deeded space, which Florida law generally protects. An association that installs a shared system still needs a written policy for individual requests, and the two should be designed to coexist rather than conflict.

What we provide to support that process is documentation the board can actually use: a scope with clear phase boundaries, a description of the electrical path, the load study behind the capacity numbers, the location and appearance of the equipment, and the permitting path. Boards approve projects they understand. We have watched more than one good proposal die because the electrical contractor sent a one line quote to a group of volunteers who had no way to evaluate it.

Bring us to the meeting if it helps. Explaining why the house service can carry sixty amps of managed charging but not a hundred and sixty is a five minute conversation in person and an impossible one over email.

Accessible stalls and how the layout gets reviewed

Accessibility applies to charging stalls, and plan reviewers in this region look at it. It is also the item most often missing from a vendor's layout drawing, because equipment companies think in ports and reviewers think in routes.

The requirements are about usability rather than about reserving a stall for a placard. A person using a wheelchair has to be able to park, get out of the vehicle, reach the charging equipment, operate the interface and the connector, and travel from the stall to the building on an accessible route. That translates into specific physical conditions:

• An access aisle alongside the vehicle space, wide enough to deploy a ramp or open a door fully.
• A firm, stable, level surface at the stall and along the route to the equipment, with no curb, wheel stop or bollard obstructing it.
• The user interface, card reader and connector holster mounted within a reachable height range, not at whatever height the conduit happened to arrive.
• Connector cable management that keeps the cord off the accessible route rather than draped across it.
• Clear floor space at the equipment large enough to approach and operate it.

In a retrofit garage, satisfying this often means choosing the accessible charging stall based on where a compliant route already exists rather than putting it wherever the feeder is shortest. It is far cheaper to select the right stall during design than to rebuild a curb ramp afterward. We work this out with the property's architect or engineer when there is one, and we flag it to the property manager when there is not.

Signage, striping and keeping the stalls usable

A charging installation that works electrically can still fail as an amenity, and it usually fails at the stall.

The recurring complaint at every property is the same: someone parked a non-charging vehicle in the charging stall, or a resident left a fully charged car plugged in for two days. Neither is an electrical problem, but both determine whether owners think the money was well spent.

What we install, and what the property has to decide:

• Pavement striping and stall marking that identifies the space clearly, including the accessible stall marked to its own standard.
• Wall or post mounted signage stating the use restriction, hours, session limits and any towing or enforcement authority. Enforcement language is the association's call and should match what their documents and Florida towing rules actually allow.
• Instructional signage at the equipment: how to start a session, who to call for a problem, and the property contact rather than only a vendor number.
• Equipment identification and hazard labeling, including circuit identification and the disconnect location, which is a code and inspection matter rather than an amenity one.
• Adequate lighting at the stalls. People plug in at night, and a dim corner of a garage is where an incident happens. If garage lighting is already tired, doing it in the same mobilization is worth pricing, and our lighting installation work covers it.

Session limits and idle policies are enforced through the charging software, not through electrical hardware. Whoever is chosen as the network operator should be evaluated on that capability, because it is how the stalls stay available.

Liability, and what the association is really worried about

When a board hesitates, it is usually not about the electrical design. It is about what happens if something goes wrong in the garage. That concern deserves a straight answer rather than reassurance.

The things that actually reduce exposure are unglamorous. Equipment that is listed for its application and installed the way the listing requires. A permit and a passed inspection on file, so there is a public record that a qualified party built it and an inspector accepted it. Overcurrent protection and a disconnecting means that are correctly sized and clearly identified so the fire department can kill power to the charging equipment without shutting down the building. Physical protection so a vehicle cannot strike energized equipment. Documented commissioning showing the system was tested at the settings it was designed around.

Coverage questions belong to the association's agent, but the agent will ask whether the work was permitted and who performed it, and having clean answers to that makes the conversation short. We provide the permit record, the inspection sign-off, the equipment cut sheets, the as-built drawing and the commissioning documentation as a package at closeout, because in five years nobody will remember any of it otherwise.

One more item worth naming. Charging equipment in a garage is exposed to weather, salt, impact and misuse in a way that equipment in an electrical room is not. A maintenance expectation should be set at handover: who inspects the connectors and cables, how often, and who gets called when a stall is dead. Properties that assign that responsibility keep their systems working. Properties that assume the network operator handles everything end up with three dead ports and no record of when they failed.

Building it while people live and work there

The garage does not close. That constraint drives the schedule more than the electrical work does, and coordinating it with the property manager is a real part of the job.

How we sequence an occupied property:

• Walk the garage with management before pricing, at the hour the garage is fullest, so the plan is built around actual usage rather than an empty morning.
• Take spaces in small groups, working one bay at a time and returning it before opening the next, rather than closing a level.
• Give management written notice they can distribute, with dates, affected space numbers and a contact, far enough ahead that residents can plan. Property managers are judged on notice, and a contractor who provides it is easy to work with.
• Schedule loud and disruptive work deliberately. Anchoring into a concrete deck is extremely loud inside a residential building. That work belongs in mid-morning hours, not at seven in the morning under someone's bedroom.
• Plan the shutdowns. Tying a new feeder into the house panel requires an outage. That outage affects elevators, pumps, gates and corridor lighting, and it needs to be scheduled, noticed, and kept short. Where an outage genuinely cannot be tolerated, we discuss temporary arrangements in advance rather than improvising on the day.
• Protect the property. Drilling concrete makes dust that settles on every car on the level. Containment, cleanup and floor protection are part of the price and should be in the scope.

Access control is the other coordination item. Crews need garage access, elevator or freight access, electrical room keys and a place to stage material that is not a fire lane. Working that out with management in the first week prevents a lot of lost days. We handle this the same way we handle our other property management accounts, with a single point of contact and a schedule the manager can forward without editing.

What plan review looks for in a garage retrofit

Charging infrastructure at this scale is permitted work, and in most of our jurisdictions the submittal requires drawings prepared by a design professional, not a sketch. Reviewers are consistent about what they want.

They look for a load calculation justifying the added demand against the existing service, with the managed system's ceiling shown as the number used if load management is part of the design. They look at feeder and overcurrent device sizing, conductor ampacity at the terminal temperature rating, and voltage drop on long garage runs. They look at the wiring method, support spacing and physical protection in a parking structure. They look at grounding and bonding, at the disconnecting means and its accessibility, at working clearance in front of panels and gear, and at equipment listings for the environment. They look at the accessible stall and its route. In a parking structure they may also look at ventilation, fire protection interfaces and firestopping at penetrations.

Inspections follow the sequence of the work: rough on the raceway and boxes before anything is closed or concealed, then the equipment and terminations, then final with the system energized and the settings demonstrated. On phased projects, we get the stubbed conduit inspected and documented as part of phase one so that phase two does not become an argument about what is behind the wall.

Documents that make a proposal real

To put a serious number on charging infrastructure for your property, we want a few things. Some clients have all of it and some have none, and either is workable.

• The property address and a garage or site plan showing parking layout and stall numbers.
• Electrical service information: size, voltage and configuration for the house service, and the location of the meter room and main gear.
• Twelve months of utility bills for the common meter so we can see real demand and not just consumption.
• How many ports you want now and how many you want to reach eventually.
• The billing model the board or ownership has chosen, or a willingness to decide it with us.
• Whether a network operator or equipment vendor has already been selected.
• Who the decision maker is: board president, management company, asset manager or owner.

If the answer to most of those is unknown, that is normal. We start with a site walk, open the gear, find the capacity and tell you what the property can support before anyone spends money on a design.

Start with a site walk

The best time to call is while the board is still discussing it, before a vendor has quoted equipment against a building nobody has evaluated. Call (954) 602-0050, tell us the property type, the number of spaces and what you are trying to accomplish, and we will tell you what the electrical path looks like and what has to be decided before a design is worth paying for.

We answer the phone around the clock, we work across the full South Florida service area, and we handle the surrounding scope too: garage lighting, panels, feeders, submetering and the rest of the commercial electrical work a property needs. For individual unit owners installing at their own space, and for the load management equipment that makes a shared garage system possible, see our EV charging station page. To get on the schedule, reach us at (954) 602-0050 or through the contact page.