Interconnection queues in 2026: the numbers every fleet VP should know

Fleet electrification plans are built on vehicle delivery dates. The schedule that actually governs them is the utility's. This guide collects the interconnection and upgrade numbers a fleet VP should carry into every planning meeting in 2026, explains why the queue is long, and sets out what a fleet can do about it without waiting.

The headline number

Lawrence Berkeley National Laboratory's Queued Up analysis, updated in 2025, tracks roughly 2,600 GW of generation and storage capacity waiting in US interconnection queues. That figure is for supply-side projects, not fleet depots, but it matters to fleets for a simple reason: the same utility planning engineers, the same substations and the same distribution feeders that serve those queues also serve a depot asking for a new megawatt-scale service. A utility with a decade of queued generation study work is a utility with a long line for load studies too.

The timelines to budget

Three 2026 sources put numbers on what fleets actually experience.

End-to-end depot electrification: 8 to 18 months. Oxmaint's 2026 fleet charging infrastructure planning guide puts a first-time depot at 8 to 18 months from plan to energized chargers, including site work, engineering, permitting and utility service.

Utility upgrade: 3 to 18+ months; major grid work: 18 to 36 months. Fleet Rabbit's 2026 infrastructure planning guide separates the service upgrade from the depot project and from major distribution or substation work, which runs 18 to 36 months.

Grid constraints are the critical path. Charged Fleet's 2026 review of fleet electrification after the hype cycle concludes that in 2025–26 the binding constraint is the grid connection rather than vehicle availability or price.

A fleet VP planning a 2027 deployment who has not filed a service application in 2026 should assume the chargers will not be energized on the vehicle delivery date.

Why megawatt loads take longer

Small loads ride on existing distribution capacity. Megawatt loads do not. A 100-truck yard that needs 3 to 5 MW overnight is a medium-voltage service, and the MCS hubs now entering corridor deployment need medium-voltage connections outright, per EV Infrastructure News' 2026 MCS guide. Medium-voltage service means a utility load study, often a feeder or substation upgrade, easements, transformer lead times and a construction window. Each step has a queue.

The utility is not the villain here. It is allocating scarce engineering and construction capacity across everything in the region that wants power. The fleet's job is to get in line early with an honest number, and to make sure the trucks do not sit idle while the line moves.

What the queue costs a fleet

The cost is idle vehicles. Evaisun's 2026 EV charger RFP checklist estimates downtime at $800 to $1,500 an hour for a 30-van fleet. Scale that to a 150-van depot or a 100-truck yard, multiply by the idle hours per day and by the months in the timelines above, and the queue becomes a line item larger than the charging equipment. The downtime calculator puts your own numbers into that equation.

Five moves for a fleet VP in 2026

1. File the service application before the vehicle order. The utility clock starts when the application is complete, not when trucks arrive. Ask for the study timeline in writing and the assumptions behind it.

2. Size honestly, and size for the end state. Utilities dislike serial applications. A depot that asks for 1 MW now and 3 MW next year goes to the back of the line twice. Apply for the fleet you will have, and phase the chargers.

3. Reduce the ask with storage. Battery storage lets a smaller service deliver megawatt-rate charging overnight. A 200 kW service delivers 4,800 kWh over 24 hours, which is 13 trucks at 350 kWh, from a service most sites already have. A smaller service application can mean a shorter study.

4. Bridge with mobile capacity while the queue moves. Mobile blocks with on-board storage, recharged from the existing service or on-site generation, deliver megawatt charging in days. The permanent project continues; the vehicles stop waiting. See fleet depot charging and heavy-duty truck charging.

5. Write the exit into the bridge. The bridge should end when the utility delivers. Require no early-termination penalty after a minimum term once permanent service is energized, and relocation rather than disposal. The MegaWatts pricing terms are structured that way.

What to put in the board deck

• The utility's written study and energization dates for each depot
• The 8 to 18 month end-to-end range and the 18 to 36 month major-work range, sourced above
• The number of vehicles that will arrive before energization at each site
• The idle-vehicle cost per month at each site
• The bridge plan, its cost, and its exit trigger

A board that sees those five lines understands why charging is on the critical path and why a bridge is cheaper than the wait. A Site Power Plan produces the bridge line for a specific site in 48 hours.

Reading the utility's answer

Utility responses to a megawatt-scale load application fall into recognizable types, and each implies a different plan.

"Capacity available; standard service." Rare for megawatt loads, but it happens near industrial feeders. Proceed with the permanent project and a minimal bridge for early vehicles.

"Load study required." The normal case. The study itself takes months. Ask for the study scope, the fee and the date, and start the bridge now.

"Upstream upgrade required." A feeder, transformer or substation must be built. This is the 18 to 36 month category. Bridge fully and plan for the permanent project to change scope at least once.

"Not serviceable at this time." Some sites cannot get the requested load for years. Consider whether the depot should be there at all, or whether storage plus a smaller service can make it work indefinitely.

Storage changes the application

Fleets often apply for the peak they would draw with no storage: 3 MW for a yard that charges 100 trucks over 10 hours. With storage in the charging equipment, the same energy can be drawn from the grid over 24 hours at a third of the peak. A smaller application may fit existing capacity, avoid an upstream upgrade and skip a study category. Before filing, run the numbers both ways and ask the utility which path is shorter. The on-site power page explains how battery-first blocks make a small service do megawatt work.

The one-line summary for the CFO

Vehicles are on a delivery schedule measured in months; power is on a utility schedule measured in years; the difference is paid in idle vehicles unless it is bridged.