EV Charging Infrastructure Design for Commercial and Fleet Sites

Most EV Charging Projects Are Under-Engineered at the Design Stage

Fleet electrification and commercial EV charging are moving fast. What's not moving fast enough is the engineering behind it. Most sites need more than a conduit plan. They need a proper load analysis, a utility capacity check, transformer sizing, and a design that leaves room to scale.

I spent a decade on the EPC and procurement side hiring engineering firms before I founded Jolt in 2017. The pattern I kept seeing: EV charging designs that looked fine on paper but created problems the moment the site tried to add more chargers, or failed at the utility interconnection stage because no one had run the numbers early enough.

At Jolt, we design for where your site is going, not just where it is today. Every package includes the electrical calculations, code compliance analysis, and PE stamp you need to get through the AHJ and the utility.

What You Get With Every Package

• •PE-stamped electrical drawings
• •NEC Article 625 compliance analysis
• •Load calculation and utility capacity review
• •Conduit routing and raceway layout
• •EVSE manufacturer coordination
• •Installation-ready permit package

Site Layout & Conduit Routing

Level 2 and DCFC charger placement, conduit runs, panel locations, and raceway sizing, designed for efficient installation and future capacity.

Load Analysis & Utility Capacity

Full electrical load calculations confirming your existing service can support the charging load, plus recommendations for upgrades or phased build-out when needed.

PE-Stamped Electrical Drawings

Licensed professional engineer stamp on every drawing set. Single-line diagrams, panel schedules, conduit plans, and equipment schedules, permit-ready from day one.

EVSE Manufacturer Coordination

We coordinate directly with your EVSE vendor to confirm equipment compatibility, circuit requirements, and installation specs, so nothing gets discovered on the job.

Transformer & Service Upgrade Design

When your existing service won't support the load, we design the upgrade. Transformer sizing, service entrance layout, and utility coordination documentation.

Fleet & Phased Deployment Planning

For sites adding chargers in stages, we design the infrastructure backbone upfront, so future phases don't require expensive retrofits to the conduit or panel.

Site & Load Review

We start by understanding your electrical infrastructure, existing service capacity, panel locations, transformer size, and future load projections. No assumptions. We gather what we need to make the design right.

Design & Code Analysis

Our engineers develop the conduit routing, load calculations, and equipment layout with NEC Article 625 compliance built in from the start. We check AHJ-specific requirements and utility interconnection rules before we finalize.

PE-Stamped, Permit-Ready Package

You receive a complete, stamped plan set with drawings, calculations, specifications, and EVSE coordination documentation, ready to submit to the building department and utility.

We Design for Scale, Not Just Today's Load

A lot of EV charging designs are sized for the current install and ignore what happens when you add more chargers. We design the electrical backbone to support future phases without retrofitting.

We Coordinate With Your EVSE Vendor

Most engineering firms hand you drawings and disappear. We stay in the conversation, coordinating with your equipment vendor to make sure the design matches what's actually going in the ground.

We Understand Local AHJ Requirements

EV charging permitting varies significantly by jurisdiction. We track local code interpretations and utility interconnection requirements across 20+ states, so your package gets approved, not bounced.

We're Reachable When You Need Us

If your electrician has a question on the job, they can call us. That's not something most engineering firms offer. We're US-based, available, and here to help close the project, not just deliver a drawing set.

What types of EV charging projects does Jolt design?

We work on commercial, industrial, multi-family, retail, and fleet depot sites, Level 2 and DC Fast Charging (DCFC). Whether you're installing 2 chargers or 50, we size the design for your site and your growth plans.

Do you provide load calculations and service upgrade design?

Yes. Every project includes a full load analysis to confirm whether your existing service can support the charging load. When an upgrade is needed, we design the service entrance modification and provide documentation for utility coordination.

How do you handle EVSE manufacturer coordination?

We work directly with your chosen EVSE vendor to confirm circuit requirements, conduit sizing, mounting details, and communication wiring. This eliminates the gap between the engineering drawings and what the equipment actually needs.

Can you design EV charging for a phased deployment?

Absolutely. We regularly design sites where the first phase installs 10 chargers but the infrastructure needs to support 30. We size conduit, panels, and transformer capacity upfront so future phases don't require expensive retrofits.

How long does EV charging design take?

Most plan sets land in a 2 to 3 week range, sometimes sooner depending on the project. Complex sites or utility interconnection coordination may run longer. We will give you a clear timeline at kickoff.