EV and mixed fleet management: A guide for fleet managers

Managing a fleet has never been straightforward. As electric vehicle (EV) adoption accelerates, fleet managers are balancing petrol, diesel, hybrid, and electric vehicles with different operational requirements, costs, and infrastructure needs.

That is what mixed-energy fleet management looks like in 2026. Instead of replacing one technology with another, businesses are managing different vehicle types, energy sources, and operational requirements within the same fleet.

This guide explains how EV and mixed-energy fleet management works, the challenges businesses face, the benefits available, and how technology can help improve fleet operations.

What Is EV fleet management?

EV fleet management covers the operation of electric vehicles used for business purposes, including vehicle performance, charging activity, maintenance, costs, and driver support. 

Within a mixed-energy fleet, EV management forms part of a wider approach that includes:

• Electric vehicles
• Hybrid vehicles
• Petrol and diesel vehicles

Key areas of EV and mixed-energy fleet management include:

• Monitoring vehicle usage and performance
• Managing fuel and charging costs
• Planning routes around vehicle capabilities
• Managing charging access and payments
• Tracking maintenance and downtime

Rather than focusing on a single fuel type, a mixed-energy fleet approach helps businesses manage different vehicle types, energy sources, and operational requirements. 

What are the challenges of managing EV and mixed fleets? 

Managing mixed-energy fleets requires businesses to balance several key challenges: 

1. Managing fuel and charging costs

Mixed fleets require visibility across multiple energy sources, including petrol, diesel, and electricity. Fleet managers need to track fuel spend, public charging costs, workplace charging, and home charging reimbursement to understand total running costs.

2. Planning charging alongside daily operations

Unlike traditional refuelling, EV charging needs to be planned around vehicle routes, availability, and schedules. Businesses need to consider where vehicles charge, when charging takes place, and how costs are managed. 

3. Choosing the right vehicles for electrification

Not every vehicle is suited to electrification. Fleet managers need to consider mileage, routes, payload requirements, charging availability, and total cost of ownership before replacing vehicles.

The benefits of EV and mixed fleets 

The benefits of mixed-energy fleet management extend beyond lower emissions.

1. Lower maintenance costs

EVs can reduce some fleet operating costs through lower maintenance requirements. According to WhoCanFixMyCar, the average cost of a full service for an EV is £157.91, compared with £203.06 for an internal combustion engine (ICE) vehicle. 

For larger fleets, these savings can add up over the lifetime of a vehicle.

2. Lower fuel and energy costs 

Energy costs can vary significantly across vehicle types and energy sources. For fleets running a mix of EVs and petrol or diesel vehicles, understanding these differences can help you identify where costs are higher and where there may be opportunities to reduce them.

HM Revenue & Customs (HMRC) advisory fuel rates provide a useful benchmark for comparing typical running costs:

Actual costs depend on energy prices, charging location, vehicle efficiency, and usage. 

Figures are based on HMRC advisory fuel rates available in August 2026 and reflect a snapshot of typical running costs at that time. Actual costs will vary depending on energy prices, charging location, vehicle efficiency and usage.

3. Greater flexibility in operations 

A mixed-energy fleet allows businesses to match vehicles to different requirements:

• EVs for predictable urban routes and shorter journeys
• Hybrids for mixed-use operations
• Diesel vehicles for heavier loads and longer journeys

This allows businesses to introduce EVs where they provide the most value while maintaining operational reliability.

4. Government incentives

Many governments offer financial incentives for businesses shifting to electric vehicle fleets. Fleets based in the UK can benefit from grants such as the Plug-in Van Grant and Electric vehicle infrastructure grant for staff and fleets.

5. Supporting lower-emission operations

Transitioning suitable vehicles to electric can help businesses reduce transport-related emissions. According to the Department for Energy Security and Net Zero, transport accounted for 28% of UK greenhouse gas emissions in 2023. 

For many businesses, a mixed-energy approach provides a practical way to reduce emissions while continuing to meet operational requirements. 

Best practices for managing mixed-energy fleets

Effective mixed-energy fleet management requires businesses to understand vehicle usage and make decisions based on operational needs. 

Assess vehicle requirements before transitioning vehicles

Review routes, mileage, payload, utilisation, and total cost of ownership to identify where EVs are suitable and where other vehicle types remain necessary.

Bring fuel and charging data together

Combine fuel transactions, EV charging activity, and vehicle data to create a clearer view of fleet energy costs and performance. 

Plan charging around fleet operations

Develop a charging strategy based on vehicle routes, charging locations, operating schedules, and energy costs. Consider the most suitable times for charging, such as overnight when electricity rates may be lower. 

Monitor fleet performance and costs

Track vehicle usage, energy consumption, maintenance requirements, and operating costs to understand where improvements can be made.

Create consistent driver processes

Ensure drivers understand charging, refuelling, payments, and vehicle usage procedures so different vehicle types can operate efficiently within the same fleet.

EV fleet management with WEX 

As fleets bring electric vehicles into the mix, keeping track of fuel, charging, payments, and vehicle data across different energy types becomes harder to manage alone. WEX fleet management solutions bring fuel, vehicle and energy data together, giving fleet managers a clearer view of costs and day-to-day operations.

Contact us today to discover how WEX can help your business manage your fleet as vehicle and energy requirements change.