Field notes · 31 August 2026
On a Level 3 site, the utility sets the schedule
DC fast charging draws enough power that the local utility becomes a project participant rather than a supplier. Almost every EV charging schedule that slips, slips there — and it slips for reasons that were knowable in the first week.
Why Level 3 is different
It is a service upgrade wearing a parking-lot costume.
Level 2 charging generally works within a site's existing electrical service. Level 3 — DC fast charging — typically does not. It draws from three-phase supply at a scale that often exceeds what the site was built for, which means a new or upgraded service, and often new utility-side equipment.
That reframes the project. It is not a site improvement with an electrical component; it is an electrical service project with a site component. Sites that are planned the first way discover the second way in month three.
The single highest-value decision
File the service request before the layout is finished.
The utility's process — capacity confirmation, service design, equipment lead time, and any easement it needs — runs largely independently of site design and permitting. It cannot be compressed by finishing drawings faster.
Filing early costs almost nothing and buys the one thing no amount of engineering can: an answer about capacity while the layout is still cheap to change. A site that turns out to need a transformer, a new service run, or utility-side work is a different site plan, and it is far better to learn that before parking layout and civil design are locked.
What the engineering has to settle
The items that actually shape the site.
Once capacity is understood, the design questions are ordinary but interdependent, and each one moves the others.
- Service and equipment locationWhere the service enters, where switchgear and transformers sit, and the clearances and access each requires.
- Feeder routingHow power reaches the dispensers, and what that routing does to paving, drainage and existing utilities.
- Dispenser layoutStall geometry, vehicle circulation, ADA accessibility, and pull-through requirements where they apply.
- Civil and structuralFoundations and bollards, grading and drainage around new equipment, and paving restoration.
- PermittingSite plan, electrical permit, and any jurisdiction-specific requirements for charging equipment.
Scope, stated plainly
What we do and do not do here.
Aria engineers EV charging sites: site design, civil and structural, utility coordination, permitting and sealed construction drawings for Level 2 and Level 3 installations on surface lots, structured garages, fleet yards and multi-family properties.
We do not perform the electrical installation, we do not supply or commission charging hardware, and we cannot influence a utility's capacity or its queue. What coordination does is prevent avoidable delay — filing early, filing complete, and keeping the site design consistent with what the utility comes back with.
In short
Level 3 EV charging engineering
- Level 2 charging generally works within a site's existing electrical service; Level 3 DC fast charging typically requires a new or upgraded service and often utility-side equipment.
- The utility's capacity confirmation, service design, equipment lead time and easement requirements run independently of site design and permitting, and cannot be shortened by finishing drawings faster.
- The electric service request should be filed before the site layout is finalised, because a capacity answer can change the layout while it is still cheap to change.
- EV site engineering must settle service and equipment location, feeder routing, dispenser layout and circulation, civil and structural work, and permitting — each of which affects the others.
- Aria engineers EV charging sites including site design, civil and structural, utility coordination, permitting and sealed drawings, for Level 2 and Level 3.
- Aria does not perform electrical installation, does not supply or commission charging hardware, and cannot influence a utility's capacity or queue position.
- Aria's professional engineers hold licensure across 48 states, plus the District of Columbia and Puerto Rico, and maintain NCEES records for comity licensure elsewhere.