The short answer
Commercial fleet electrification adds 50-100 kWh/day per vehicle. A 50-vehicle fleet adds 2,500-5,000 kWh/day. Managed charging on TOU rates costs $0.04-$0.10/kWh; unmanaged uncontrolled charging triggers demand charges of $5,000-$50,000/month. Most utilities offer dedicated fleet rate schedules.
Commercial fleet electrification (delivery vans, last-mile trucks, school buses, transit) is the fastest-growing commercial electricity load segment. A 50-vehicle fleet charging overnight adds 2,500-5,000 kWh/day — equivalent to a small office building. Without proper rate planning, fleet charging can spike demand charges $5,000-$50,000/month. With managed charging, time-of-use rates, and the right utility tariff, fleet electricity costs $0.04-$0.10/kWh — well below diesel-equivalent.
Fleet load impact
Light commercial van: 60-100 kWh battery, 30-50 kWh/day per vehicle.
Heavy truck (Class 6-8 electric): 250-700 kWh battery, 200-500 kWh/day on routes 100+ miles.
School bus: 120-300 kWh battery, 60-150 kWh/day on 60-100 mile routes.
50 vans on 50 kWh/day average = 2,500 kWh/day = 75,000 kWh/month, comparable to a small office building.
Utility rate strategy
Most utilities offer dedicated EV fleet rate schedules with TOU components — overnight rates $0.04-$0.08/kWh, daytime rates $0.18-$0.30/kWh.
Demand charge management: charge sequencing software (ChargePoint, Volta, Greenlots, EVgo Fleet) staggers vehicle starts to keep peak under 200-500 kW depending on tariff.
Smart charging: prioritize vehicles by next-day route (long routes charge to 100%, short routes to 80%) to reduce total kWh.
Demand response: enroll fleet in utility DR programs. Pause charging during 5-25 grid events/year. The demand-response-rebate-guide covers payment structures.
Service capacity, install costs, and federal incentives
Service upgrade: most depots need 1 to 3 MW of service capacity for full fleet electrification. Lead times for major service upgrades run 6 to 18 months from the utility, especially in regions with active interconnection queues. Engage early in the planning process — fleet electrification typically waits on service capacity rather than vehicles or chargers.
EVSE (Electric Vehicle Supply Equipment) costs vary by charger class. Level 2 chargers (7 to 19 kW) run $1,500 to $5,000 installed per port and are typically used for overnight depot charging. DC fast chargers (50 to 150 kW) run $40,000 to $150,000 installed and are used for opportunity charging during driver breaks or at en-route locations.
Federal IRA Section 45W commercial clean vehicle credit ($7,500 to $40,000 per vehicle depending on weight class) plus Section 30C alternative fuel infrastructure credit (30 percent up to $100,000 per charger). Combined, these credits cover 30 to 60 percent of fleet electrification capital costs through 2032. State and utility incentives stack on top: California, New York, Massachusetts, and several other states have additional fleet rebates.
Make-ready programs: many utilities (PG&E, SCE, Eversource, ConEd, others) install service infrastructure to fleet depots at utility cost as part of state EV-deployment programs. This shifts $200,000 to $1,000,000 of capital cost off the fleet operator. Always inquire about make-ready before signing service contracts.
Managed charging — the difference between $0.04/kWh and chaos
Uncontrolled charging is the default failure mode. If 50 vehicles plug in at 6 PM when drivers come back from routes, the depot peak hits 1.5 MW for 4 hours. At commercial demand-charge rates of $20 per kW per month, that is $30,000 per month in demand charges alone, on top of energy charges.
Managed charging staggers vehicle starts across the overnight window (10 PM to 6 AM in most TOU schedules). The depot peak drops to 200 to 500 kW, demand charges fall 70 to 80 percent, and the energy is purchased at the cheapest TOU rate. Charge management software (ChargePoint Fleet, Volta, Greenlots, EVgo Fleet) automates the scheduling.
Smart charging adds another layer: prioritize vehicles by next-day route. Long-route vehicles charge to 100 percent; short-route vehicles charge to 80 percent. This reduces total kWh consumed (battery degradation slows above 80 percent SOC and energy efficiency drops). Combined savings: 15 to 30 percent of fleet energy cost vs unmanaged charging.
Demand response participation: enroll the fleet charging schedule in utility DR programs. Pause charging during 5 to 25 grid stress events per year and earn $5 to $50 per kW of curtailable load. The demand-response-rebate-guide covers commercial DR programs.
Infographic
Fleet charging demand curve — managed vs unmanaged
Total cost of ownership vs diesel and gas fleets
Fuel cost: diesel at $4 per gallon in a Class 6 truck (8 mpg) costs $0.50 per mile in fuel. Electric at $0.07 per kWh and 1.5 kWh per mile costs $0.105 per mile. 70 to 80 percent fuel cost reduction. For a fleet driving 25,000 miles per vehicle per year, that is $10,000 per vehicle per year saved on fuel.
Maintenance cost: electric vehicles have far fewer moving parts (no engine oil changes, no transmission service, regenerative braking extends brake pad life 2 to 3x). Maintenance cost typically drops 40 to 60 percent vs diesel.
Total cost of ownership (TCO): for fleets driving 30,000+ miles per vehicle per year, EV TCO is now competitive with or below diesel even before federal incentives. With incentives, EV TCO is typically 15 to 30 percent below diesel for high-mileage applications.
Range and routing: most last-mile delivery routes (under 200 miles per day) are well-suited to current Class 4 to 6 electric trucks. Long-haul Class 8 (500+ miles per day) is harder; battery technology improvements over the next 5 to 10 years are expected to expand the addressable range.
Recap
Bottom line
Commercial fleet electrification is one of the largest emerging electricity-load segments in the United States, and managed correctly it delivers 70 to 80 percent fuel cost reductions vs diesel along with 40 to 60 percent maintenance savings. The keys are service-capacity planning (start 6 to 18 months ahead), managed charging software (cuts demand charges 70 to 80 percent), and full claim of federal IRA incentives ($7,500 to $40,000 per vehicle plus 30 percent of charger costs).
For fleets considering electrification, the cleanest workflow is: (1) audit current fleet energy and operations data, (2) engage utility for service-capacity assessment and make-ready program eligibility, (3) select managed-charging software that integrates with your operations, (4) phase deployment across the fleet over 24 to 48 months. The ev-home-charging-rate-plan-guide covers residential EV TOU; the demand-charge-strategy and capacity-tag-management-pjm-ercot guides cover the underlying commercial energy management.
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