How to Electrify a Blue Light Fleet

Why Blue Light Fleets Are Different

Emergency service duty cycles are set by the public, not the fleet manager. Charging has to fit around them.

• Always on: services run 24 hours a day, 365 days a year
• Police mileage: up to 300 miles a day across a police vehicle fleet
• Fire appliances: must be able to pump water continuously for at least 4 hours
• Ambulances: average response time target of 7 minutes for life-threatening calls

These demands add cost. The Midlands Net Zero Hub report estimates that blue light depot electrification typically costs 15–35% more than an equivalent commercial depot. It points to four causes: resilience and redundancy, space-constrained estates, leased buildings that need landlord consent, and 24/7 availability that limits timed or flexible connections. Critical sites also often need a firm connection, with a second supply leg, which costs more than a standard connection.

Vehicle availability is no longer the main barrier. Emergency Services Times' 2025 survey of 103 services found that 13% of their 53,000 vehicles were battery electric or hybrid, and the range of suitable models is growing. Three constraints now matter most: access to charging infrastructure, access to sufficient grid capacity, and access to funding.

The same survey found that 67% of responding organisations did not know how much they would spend on electric or hybrid vehicles before 2030. A structured plan closes that gap.

Timing Matters More Than the Vehicle

• Vehicles: delivered in weeks
• Chargers: installed in months
• Grid connections: new or upgraded connections to stations can take several years

Legislation is already shaping supply. In 2026 the zero emission vehicle (ZEV) mandate requires 33% of new cars and 24% of new vans to be zero emission, and the phase-out of new internal combustion engine sales by 2035 remains in place for vehicles up to 26 tonnes. Start small, look to scale fast, and plan the longest lead time, the grid connection, first.

Plan: Understand Your Baseline

An informed plan is built on data from several sources. It does not need to be perfect at the start.

Collect the Data

• Senior decision makers: realistic goals and expectations, agreed across departments
• Assets: vehicles on the fleet, usage patterns and chargers already installed
• Sites: electrical condition, current demand and connection arrangements
• Operations: upcoming site changes, vehicle deployments and regulatory constraints

Build a Baseline

EVs generally need more capital upfront and then cost less to run and maintain. Judging that trade-off needs more than anecdote from front-line teams. Document:

• Current purchase or lease costs of fossil-fuelled vehicles
• Mileage and fuelling needs by vehicle or group, captured in a structured way
• The operational requirements each vehicle role has to meet

Use Real Duty-Cycle Data to Size Infrastructure

Infrastructure need is not fixed by fleet size. A site with many response vehicles that must turn around quickly has a different profile from one with mostly administrative pool vehicles, even if the fleets are the same size. Telematics data shows how vehicles are actually used, so chargers and connections can be sized to real demand.

The Midlands Net Zero Hub report finds that optimised scheduling, load management and duty cycle adjustment can materially reduce the chargers and grid upgrades needed, provided forces have the telematics and planning capability to support it. Earlier desktop modelling put police fleet infrastructure at £1.7 billion to £2.8 billion. The 2026 estimate of £1.4 billion was built from telematics-led analysis and force-level studies. Telematics coverage varies between forces, so improving it is an early priority.

Sequence by Feasibility and Impact

Requirements vary between services, fleets and roles, and site conditions such as power headroom and space change feasibility and cost. A simple analysis of vehicles and estates lets you group segments by feasibility and impact, and decide the order of work. Share the sequence with neighbouring services early. It is the quickest route to shared learning and shared infrastructure.

Our expert analysts and engineers help you build a data-led, costed EV transition plan for your estate and fleet.

• EV suitability assessment by vehicle role
• Cost comparison against your current fleet
• Site-level power and charger requirements
• Phased implementation plan

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Prioritise Using Total Cost of Ownership (TCO)

TCO analysis shows where transition will most affect capital and operating budgets.

• ICE vehicle TCO: operating years × (annual vehicle costs + annual operating costs)
• EV TCO: operating years × (annual vehicle costs + annual operating costs + annual infrastructure costs)

Vehicle costs include acquisition, residual value, fuel and electricity, servicing, insurance, tyres and grants. Operating costs capture the value of staff time. Infrastructure costs cover chargers, civil works, electrical and connection upgrades, and back-office and maintenance services. List prices and energy-use estimates are enough to start. Our Van TCO Calculator and HGV TCO Calculator can set the baseline.

Pilot: Test the Whole System

Early blue light pilots asked whether an EV could do the job. Vehicle specifications are now increasingly standardised, for example through the national ambulance specification, so a pilot has to test more than the vehicle: chargers, software, training, site design and the processes around them.

Pilots usually cost more per vehicle than business as usual, because of smaller volumes and first-of-a-kind costs such as training, user support and data collection. Properly designed, that investment pays back at scale.

Involve the Right People Early

A simple-looking charger installation can involve a lot of people. One ambulance service in the webinar series reported 20 to 30. Engage fleet, estates, operations, energy and building management from the start, and capture direct feedback from frontline teams as well as data. Many services also work with third-party specialists on pilot design.

Decide What Data You Need

The hypothesis you are testing determines the data you need. Most blue light pilots will need:

• Pre-deployment assessment: so modelling can be validated or refined
• Vehicle telemetry: state of charge, location and odometer readings
• Chargepoint back-office data: charging transactions, uptime and error codes
• Fuel card data: public charging behaviour and cost
• Site meter data: headroom and the wider energy context
• Operational rules: so vehicle performance constraints are clear

Know What the Analysis Must Answer

• Real-world range: which vehicle specifications are needed?
• Charging behaviour and utilisation: which charger capabilities and power levels are needed?
• Availability: how many chargepoints avoid under-provision while keeping flexibility?
• Software performance: can drivers simply arrive and charge?
• Deployment templates: what can be lifted and dropped onto other sites?
• Operational wins and challenges: which working practices and policies need to change?

Report results to the core team and the wider stakeholder base, and store them in your change management systems so lessons are accessible to everyone. Train before applying learning more widely, and use project champions to carry it beyond the core team.

Operate Core brings pilot vehicle and charger data into one cloud platform, so you can evaluate the pilot without stitching together separate systems.

• Control tower view of vehicles and charging infrastructure
• Charger management and performance analytics
• Automated alerts and reporting
• Integration with telematics, charger networks and fuel cards

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Scale: Prioritise Sites and Manage Grid Risk

Few blue light organisations have reached this stage. The new challenges are procuring the right charging infrastructure, engaging Distribution Network Operators (DNOs), phasing site delivery, securing funding and keeping operations resilient throughout.

Rank Sites by Urgency and Importance

Estates data is usually enough to start. Rank sites by urgency (which transition first, which have least resilience) and importance (which are strategically important, which need the most chargers or power). Together these show where the risk lies.

Match the Response to Power and Space

Next, assess each site's available power supply capacity and practical constraints such as dedicated parking bays and space for equipment. This gives an early strategic view you can refine as detailed requirements develop.

Plan for a Mix of Charger Speeds

Most sites will not need high-power charging everywhere. The national estimate, scaled up from analysis of 14 forces, puts the police estate at about 18,285 chargers:

• Standard, 7–22 kW: 13,830 chargers (75.6%), for overnight charging of routine vehicles with long dwell times at base
• Rapid, 50 kW: 3,922 chargers (21.4%), for resilience and turnaround, particularly response vehicles returning to service between shifts
• Ultra-rapid, 100–200 kW: 533 chargers (3.0%), used selectively for specialist or high-utilisation vehicles, and potentially at shared hubs

Know What a Typical Site Costs

The report gives indicative all-in costs for three typical sites. Charger-to-vehicle ratios of 0.2 to 0.5 apply, because not every vehicle is on site or charging at the same time.

• Small station, 15–25 vehicles: around 8 chargers at up to 22 kW, mostly overnight charging. £40,000 to £80,000
• Divisional headquarters, 50–80 vehicles: around 10 AC and 4 DC rapid chargers, with some electrical upgrade work. £220,000 to £430,000
• Large headquarters or custody suite, 150–250 vehicles: 30–50 AC, 15–40 rapid and 5–15 ultra-rapid chargers, which may need major grid reinforcement. £1.05 million to £2.2 million or more

Allow for Grid Lead Times

Grid connections set the pace. Indicative cost and lead time rise sharply with the capacity you need.

Of the 298 police sites analysed in detail, about 76% needed a 70–200 kVA low-voltage upgrade, 21% needed a new low-voltage or small high-voltage connection, and under 3% needed a new 11 kV connection. These results assume every site needs a new or upgraded connection, so some smaller sites may need less. Starting early also puts you earlier in the queue for upgrades, particularly at energy-intensive sites.

Understand the Size of the Grid Challenge

UK police forces operate around 39,000 vehicles across 48 forces and agencies, from more than 2,000 sites. A Midlands Net Zero Hub report, funded by the Department for Energy Security and Net Zero, estimates that electrifying them could require about 18,300 chargers and £1.41 billion of investment, within a range of £1.32 billion to £1.51 billion. Grid upgrades account for 83% of that, or £1.16 billion. The estimate covers charging infrastructure only. It excludes vehicles, energy costs and charging software, and it assumes every site needs a new or upgraded connection. Its cluster analysis in Nottinghamshire, South Yorkshire and West Yorkshire found grid upgrade savings of 17.6% to 25.2% at the sites suited to sharing a connection, but only 1% to 4.5% across each force's whole estate. Sharing helps where sites are close together and operations allow it. It will not remove most of the cost.

UK Power Networks has developed a Blue Light grid connection tool with Field Dynamics and 78 stakeholders from 29 ambulance trusts, fire and rescue services and police forces. It helps services understand available capacity, estimate future charging demand and get indicative costs and timescales for new or upgraded connections. The first version is due for release in 2026, free to emergency services in London, the South East and East of England.

Start With the Hardest Vehicles

The Metropolitan Police Service, with a fleet of around 5,500 vehicles, has moved its focus from easier general-purpose vehicles to electric response vehicles, which have the largest effect on emissions. At Stoke Newington it has transitioned an entire response team, showing that one DC charger can support seven response vehicles with no operational impact.

Share Charging Infrastructure

On-site charging is the most reliable option and has the lowest running costs, but it needs the most capital and takes the longest. Home charging and the public network add complications in policy, cost and time. Sharing charging between nearby organisations can fill part of the gap, and improves return on investment for hosts with spare capacity.

Services in the series describe a clear order of preference: charge on the estate by default, use a partner site as overflow, and use public charging only when you have to, because the energy cost and operational impact are higher.

• Metropolitan Police Service: trialling charging at trusted partner sites with the Greater London Authority and Islington Council. It estimates that its funding requirement for on-site infrastructure could fall by up to 33% through sharing
• Essex Police: a fleet of just under 800 vehicles, with 50 expected to be electric by the end of 2026. It uses shared high-power chargepoints at a commercial partner's depot, on 30-minute windows with guaranteed site access, use of on-site facilities and affordable rates. Shared charging complements estate charging and does not replace it

In both cases, getting fleet and operational colleagues on site to see shared charging working was key to securing buy-in.

Plan the Practicalities of Sharing

Operational continuity is the main concern blue light services raise. The cluster analysis therefore shared only the grid connection and left chargers where each service planned them. The most realistic model is a blend: lower-power overnight charging stays on site for routine use, and higher-power charging is shared for faster turnaround or demanding duty cycles. Allow for:

• Vehicle identification: shared sites need ways to identify vehicles, control access and track usage, so allocation is fair and costs can be recovered
• Dwell times: where turnaround is short and unpredictable, shared rapid charging must be sized for peak concurrent demand
• Security: police premises may restrict access by other organisations' staff, which limits co-location at sensitive sites
• Distance: charging should not sit so far from where crews are based that it affects response times

Questions to Answer Before You Share

• Hosts: Who oversees and controls shared charging? What are the challenges in accessing our sites? Who do we partner with for charging and software systems?
• Visitor fleets: What are our charging and operational requirements? Which charger types are our vehicles compatible with? What payment types, pricing models and liabilities are involved?

What to Put in Place

• Memorandum of Understanding: a formal statement of mutual understanding and intended course of action. It is not legally binding
• Legal agreements: as the partnership matures, agreements on non-disclosure, liability and site access
• e-Mobility Service Providers (eMSPs): agreements are increasingly made through an eMSP or other trusted broker, not directly between host and visitor

Operate Book is the charger-sharing and booking module in the FPS Operate platform.

• Open spare charging capacity to partner fleets
• Manage access and booking

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In Practice: West Mercia Police

West Mercia Police (WMP) runs 769 vehicles across 2,868 square miles, covering more than 8.8 million miles a year from around 54 locations and 56 different vehicle functions. Fuel use accounts for nearly half of its scope 1 and 2 emissions. Its target is to halve 2023 emissions by 2030.

FPS combined its EV Transition Planning Tools with a tailored stakeholder consultation programme to model 371,000 individual vehicle movements and the charging demand they create at every location in the estate, including the higher energy demands of high-performance response vehicles. The result:

• Feasible pathway: replace 49% of vehicles with current technology, and up to 97% with advances expected in the next five years
• Roll-out sequence: vehicles and infrastructure phased together to balance utilisation and future-proofing
• Infrastructure savings: more than £1m in potential savings by removing low-utilisation charging infrastructure
• DNO evidence: half-hourly charging load profiles for each site to support connection discussions

Read the West Mercia Police Case Study

Common Challenges

Next Steps

1. Gather baseline data: start collecting vehicle, site and operational data now
2. Check grid capacity: begin the conversation with your DNO for priority sites
3. Prioritise with TCO: rank fleets and sites by likely impact on budgets
4. Talk to neighbouring services: share plans and look for shared charging opportunities
5. Design your pilot: test the whole system, with monitoring and evaluation built in from the start

This guide draws on the Cenex and FPS report Turning Blue Lights Green, which sets out national, regional and local recommendations for blue light fleet electrification. Read the Turning Blue Lights Green report (PDF).

Sources: Emergency Services Times, Blue lights, green fleet; SMMT; Midlands Net Zero Hub, UK Police Fleet Electrification: Understanding the Scale of the Challenge; UK Power Networks, Blue Light innovation project; Cenex and Flexible Power Systems, Turning Blue Lights Green (2026).