Parking garages add EV chargers one deck at a time, not all at once. The operator surveys the electrical capacity and the mobile signal on a first level, groups the charging bays near the power source, settles how drivers will access and pay, and installs a first row that later decks can copy. The hardware is the same as on a surface lot — the building around it makes a garage project different.
Key Takeaways
- A garage adds chargers deck by deck: survey first, install a grouped first row, then copy the pattern.
- Three surveys decide the project — electrical capacity, mobile signal at the bays, and the building’s own questions.
- Structural, fire and ventilation questions go to the building’s engineer and the local code reviewer, in writing.
- Access rules are set by the garage and enforced by the chargers.
What Makes a Garage Different From a Surface Lot
| Question | Surface lot | Parking garage |
|---|---|---|
| Where does the power come from? | Chargers stand close to the meter and switchgear. | The electrical room usually sits on one level; every other deck is a cable run away from it. |
| How do drivers find the bays? | The row is visible from the entrance. | Drivers must be led level by level — signage and bay marking are part of the works. |
| Will payment and access work? | Open sky gives phones and terminals a signal. | Concrete decks weaken mobile signal, so connectivity is a survey item, not an assumption. |
| Who else must agree? | Mainly the site owner and the utility. | The building’s engineer, fire strategy and insurer raise questions an open lot never does. |
Our overview of how commercial charging stations work covers the equipment itself; a garage project is about feeding it, connecting it and helping drivers reach it inside a structure.
Start With Three Surveys
- Electrical. A licensed electrician confirms what spare capacity reaches the deck; the building’s existing load decides how many chargers the first row can carry. Charging is a continuous load, so circuits are sized at 125% of the charger’s draw: a 40 A charger sits on a 50 A breaker.
- Signal. Access control, payment and fault reporting all ride on the charger’s connection. Test mobile data standing at the bays on the lowest, most enclosed level; where it fails, the design specifies wired backhaul or another agreed route before ordering.
- Building. Mounting surfaces, headroom, ventilation and the fire strategy belong to the building, not the charger datasheet. Whether the structure needs changes is a question for the building’s engineer, the local code reviewer and the insurer — raised early and answered in writing.
Choose the Deck, Group the Bays, Phase the Rest
The first row usually goes on the entry level or the level nearest the electrical room: the cable run is shortest, and drivers find the bays without learning the building. Group the bays in one run rather than scattering chargers across decks — a grouped row shares one power run, one signage route and one maintenance visit. Fit the infrastructure for the layout you expect to end with, then add chargers deck by deck as session records show the first row filling. Wayfinding is part of the same scope: entrance signs naming the level, ramp directions, marked bays, and accurate finder listings.
Chargers That Fit Garage Bays
Two shapes cover most garage rows. The EV-AC03201T dual-connector AC station serves two adjacent bays from one floor-standing post — two Type 2 connectors sharing up to 43 kW (22 kW per connector), with RFID access and OCPP 1.6J records via the platform. Where bays sit against a wall, the EV-ACT3204PE 22 kW wallbox (tethered Type 2 cable, RFID and app, IP66) mounts at the bay instead. Access by card or account follows the pattern in our guide to RFID and user management for shared chargers: the garage decides who the bays serve, and the chargers enforce it. The full range is on our commercial EV charging page.
Frequently Asked Questions
Can chargers go on every deck of a garage?
In principle, yes — but each deck repeats the same three surveys: power, signal at the bays, and the building questions for that level. Most operators prove one deck first and copy the pattern.
Does adding chargers change a garage’s fire or ventilation requirements?
That is decided by the local code and the building’s own fire strategy, not by the charger. Take the question to the building’s engineer, the local code reviewer and the insurer before the design is fixed; no requirement can be stated for a building we have not seen.
How many chargers should a garage start with?
Start with the row the first deck’s capacity can feed and the demand you can already see. Session records from that row, not a ratio, tell you when the next deck earns its chargers.
Related Reading
- How Do Commercial EV Charging Stations Work?
- RFID and User Management for Shared EV Chargers
- Apartment and Condo EV Charging: Solutions for Shared Parking
- Hotel EV Charging: How to Plan Guest Charging That Pays Off
