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Calculating Your Yearly Operational Savings with Door Energy Mobile EV Fast Charger Versus Diesel

Calculating Your Yearly Operational Savings with Door Energy Mobile EV Fast Charger Versus Diesel

2026-01-26

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You can save real money each year by using Door Energy Limited’s Mobile EV Charging Station. Energy and maintenance costs are about 67% of what it costs to run engineering equipment. If you know about these costs, you can make better choices for your business. The Mobile EV Fast Charger charges vehicles quickly and is easy to move. Follow the steps in this guide to work out your own savings.

Key Takeaways

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If you use the Mobile EV Fast Charger, you can save up to £9,600 each year compared to diesel. The Mobile EV Fast Charger costs less for energy and maintenance, so it is a cheaper choice for your fleet. The Mobile EV Fast Charger has fewer moving parts, so it breaks down less and needs fewer repairs. You can move the Mobile EV Fast Charger to new places easily, which helps your work be more flexible. Electric charging means you do not need to worry about emissions checks or extra fees, so your work is simpler. If you check your fleet costs often, you can find ways to save money and work better over time. Choosing electric charging helps the environment and gets your business ready for future rules. Watching your energy use and costs can show you where you can save more money and help you make better choices.

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Cost Components

When you look at Door Energy Limited’s Mobile EV Charging Station and diesel, you must check all costs. Each one has its own features and costs. Door Energy’s charger is special because it is modular and very strong. You can use it for road rescue, building sites, and factories. It gives 180kW power and has two charging guns, so it is good for busy fleets.

Operational Costs

Energy and Fuel

  • Mobile EV Charging Station
    • You pay for electricity to charge your vehicles.
    • The charger has big batteries and does not need the grid.
    • You can charge two vehicles at once, which saves time and energy.

 

  • Diesel Solution
    • You have to buy diesel fuel often.
    • Diesel prices can go up and down quickly.
    • Diesel engines waste energy when they are not moving.

Logistics

  • Mobile EV Charging Station
    • You can easily move this device to different locations.
    • You do not need to carry fuel with you.
    • You can set up charging wherever your fleet needs it.
  • Diesel Solution
    • You must get fuel delivered to you.
    • You need to store and handle diesel safely.
    • Moving diesel generators is hard and takes a lot of time.

Maintenance Costs

Routine Service

  • Mobile EV Charging Station
    • You need to check the system often to keep it working well.
    • There are fewer moving parts, so you do not need to service it as much.
    • Good care stops breakdowns and keeps your fleet working.
  • Diesel Solution
    • You must change oil, filters, and fluids a lot.
    • Engines need more checks.
    • If you skip service, you might pay for big repairs and lose more time.

Repairs

  • Mobile EV Charging Station
  • Diesel Solution
    • Engine problems can cost a lot.
    • Parts wear out faster because of heat and shaking.

Other Factors

Downtime

Every day a vehicle is not working, you lose money. Regular checks and quick repairs help you stop losing time and money.

Factor Mobile EV Charging Station Diesel Solution
Downtime Risk Low (fewer breakdowns) High (more repairs)
Service Speed Fast Slower

Compliance Fees

  • Mobile EV Charging Station
    • You do not pay for emissions tests or extra fees.
    • It is easier to follow environmental rules.
  • Diesel Solution
    • You pay for emissions checks and permits.
    • New rules can make your costs go up over time.

When you look at all these costs, you can see that Door Energy Limited’s Mobile EV Charging Station gives your fleet many benefits. You save money on fuel, have less downtime, and make logistics easier, while also following new rules.

Annual Cost Calculation

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You can find out how much you save each year by using a simple method. This part shows you easy steps and formulas for both diesel and Mobile EV Fast Charger options. Follow these steps to get the right numbers for your fleet.

Diesel Solution

Fuel Formula

To work out your yearly diesel fuel cost, use this formula:

Annual Diesel Fuel Cost = (Average Fuel Consumption per Hour) × (Total Operating Hours per Year) × (Average Diesel Price per Litre)

  • First, check how much fuel your generator uses every hour.
  • Then, multiply that by the hours you use it in a year.
  • Use the average diesel price in your area. Prices can change, so look at new data from the UK Government’s fuel price reports or websites like Statista.

Tip: Diesel generators usually use between 2 and 4 litres each hour. This depends on the load and the model.

Maintenance Estimate

Diesel generators need regular checks and service. You must count the cost for oil changes, new filters, and engine checks. Use this formula:

Annual Diesel Maintenance Cost = (Number of Services per Year) × (Average Cost per Service) + (Estimated Repair Costs)

  • Most diesel units need service after 250 to 500 hours.
  • Repairs can cost more as the equipment gets older.

Mobile EV Fast Charger

Electricity Formula

To find your yearly electricity cost for the Mobile EV Fast Charger, do these steps:

 

  • Find the average price for each kilowatt-hour (kWh) in your area. Check your electricity bill or use government energy price data.
  • Work out how many kWh your charger uses in a year. Multiply the number of charging sessions by the average kWh for each session.
  • Multiply the total kWh by the price for each kWh.

Annual Electricity Cost = (Total kWh Used per Year) × (Average Electricity Price per kWh)

Note: Electricity prices can go up or down during the year. Use an average from the last year for the best guess.

Service Estimate

The Mobile EV Fast Charger has fewer moving parts than diesel units. This means you pay less for service. Use this formula:

Annual Service Cost = (Number of Routine Checks per Year) × (Average Cost per Check) + (Estimated Minor Repairs)

  • Most checks are just software updates and looking over the charger.
  • Repairs do not happen often, but you should save a little money for small problems.

Data Collection

You need good information to make your numbers right. Follow these tips:

Tip: Keeping good records helps you spot hidden costs and make better choices for your fleet.

By using these steps and formulas, you can compare both options side by side. This helps you see where you can save the most money each year.

Example Savings Calculation

You can see how much you might save each year by looking at a real example. This section shows you how to work out the costs for both diesel and electric charging. Use these steps to compare the two options for your own fleet.

Diesel Example

Let’s say you use a diesel generator to charge your vehicles. Here is how you can calculate your yearly costs:

  • Fuel Costs
  • Your generator uses 3 litres of diesel each hour.
  • You run it for 2,000 hours in one year.
  • The average price for diesel is £1.60 per litre.

Annual Diesel Fuel Cost = 3 litres/hour × 2,000 hours × £1.60/litre = £9,600

  • Maintenance Costs
  • You service the generator 4 times a year.
  • Each service costs £250.
  • You spend about £500 on repairs each year.

Annual Diesel Maintenance Cost = (4 × £250) + £500 = £1,500

  • Other Costs
  • You pay £300 for emissions checks and permits.

Total Diesel Annual Cost = £9,600 + £1,500 + £300 = £11,400

Diesel generators can cost you more if fuel prices rise or if you need extra repairs.

Mobile EV Fast Charger Example

Now, look at the costs for using a Mobile EV Fast Charger from Door Energy Limited:

  • Electricity Costs
  • Your charger uses 5,000 kWh each year.
  • The average electricity price is £0.30 per kWh.

Annual Electricity Cost = 5,000 kWh × £0.30 = £1,500

  • Service Costs
  • You do 2 routine checks each year.
  • Each check costs £100.
  • You set aside £100 for minor repairs.

Annual Service Cost = (2 × £100) + £100 = £300

  • Other Costs
  • You do not pay for emissions checks or permits.

Total Mobile EV Fast Charger Annual Cost = £1,500 + £300 = £1,800

You can see that the Mobile EV Fast Charger keeps your yearly costs much lower.

Results Summary

Here is a table to help you compare the two options:

Cost Type Diesel Solution Mobile EV Fast Charger
Fuel/Electricity £9,600 £1,500
Maintenance £1,500 £300
Compliance Fees £300 £0
Total Annual £11,400 £1,800

 

  • You save £9,600 each year by switching to the Mobile EV Fast Charger.
  • Lower costs mean you can invest more in your business.
  • You also avoid extra fees and reduce your downtime.

Use your own numbers to see how much you can save. The more you use your fleet, the bigger your savings will be.

Cost Comparison Table

Annual Costs Table

You need a clear view of your yearly costs before you make a decision. The table below shows a side-by-side comparison of the main expenses for both diesel and electric charging solutions. This makes it easy for you to see where your money goes each year.

Cost Category Diesel Solution Mobile EV Fast Charger
Fuel/Electricity £9,600 £1,500
Maintenance £1,500 £300
Compliance Fees £300 £0
Total Annual £11,400 £1,800

This table helps you spot the biggest differences in cost. You can see that fuel and maintenance make up most of the diesel expenses.

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Total Savings

When you switch to the Mobile EV Fast Charger, you keep more money in your business each year. The savings add up quickly. Here is how you work out your total annual savings:

Total Annual Savings = Total Diesel Annual Cost - Total Mobile EV Fast Charger Annual Cost

So, with the numbers above:

Total Annual Savings = £11,400 - £1,800 = £9,600

You save £9,600 every year. This money can help you grow your business, buy new equipment, or improve your fleet.

  • You avoid high fuel bills.
  • You spend less on repairs and service.
  • You do not pay for emissions checks or permits.

Every pound you save on running costs gives you more freedom to invest in other areas.

Visual Difference

You can understand your savings better when you see them. The chart below shows the yearly costs for both options. The difference stands out.

Solution Annual Cost (£)
Diesel Solution 11,400
Mobile EV Fast Charger 1,800

 

  • The diesel bar is much higher than the electric bar.
  • The gap between the two bars shows your yearly savings.

If you want to make a smart choice for your fleet, look at these numbers. The Mobile EV Fast Charger helps you cut costs and run your operations more efficiently.

Seeing the numbers side by side makes your decision easier. Lower costs mean a stronger business.

Further Benefits

Reduced Downtime

You want your vehicles to keep moving and not stop. The Mobile EV Fast Charger helps you avoid breakdowns. It has fewer moving parts, so less can go wrong. You do not wait long for repairs or checks. Fast charging means your vehicles get back to work quickly. You do not need to wait for fuel to arrive. You also do not worry about engine problems. Your team can move the charger to any place needed. This keeps your work going without big stops.

Fast charging and fewer problems mean your vehicles work more and spend less time in the garage.

Environmental Impact

Switching to electric charging is good for the planet. Many governments want companies to use EV charging stations. You might get rewards for meeting green goals. You also skip emissions checks and extra costs. Clean energy lowers your carbon footprint and helps green projects.

  • You are ready for new environmental rules.
  • You show customers and partners you care about the planet.
  • You help make the air cleaner in your area.

Picking electric charging is a smart way to follow future rules and show you lead in green actions.

Long-Term Value

You save money over time with electric charging. Electric vehicles and chargers can cost more at first. But you pay less for repairs and checks. You do not need oil, filters, or engine fixes. Government grants and tax cuts can help you save even more. You spend less as you avoid high fuel prices and big repairs.

Benefit Diesel Solution Mobile EV Fast Charger
Maintenance Costs High Low
Fuel/Energy Costs Unpredictable Stable
Compliance Fees Rising None
Long-Term Savings Limited Significant

Over the years, you keep more money and can grow your business instead of spending it on running costs.

Door Energy Limited keeps making better battery energy storage systems and charging technology. You get strong equipment and support that helps your fleet stay ready for the future.

Applying the Method

Customising for Your Fleet

You can change the savings calculation to match your own fleet. First, write down all your vehicles and what charging they need. Keep track of how many hours each vehicle works every week. Write down what kind of charging station or generator you use. Collect information about how much fuel or electricity each vehicle uses. You should also count how many times you check or fix each vehicle every year.

  • Make a table with columns for vehicle type, hours used, energy used, and service costs.
  • Use the formulas from before to find out yearly costs for each vehicle.
  • Add up all the numbers to see how much your whole fleet costs.

Tip: You can use a spreadsheet to keep track of costs and see patterns. This helps you find ways to save more money.

Avoiding Pitfalls

You need to be careful about common mistakes when working out costs. Some people forget to add hidden fees or time when vehicles are not working. Others use old fuel prices or miss new service charges. Always use the newest numbers for fuel and electricity prices. Check if government rules or fees have changed.

  • Look at your records every month.
  • Change your calculations if prices go up or down.
  • Add every cost, even small things like little repairs or software updates.
Common Pitfall How to Avoid
Using old price data Check prices every quarter
Missing downtime Track hours lost each month
Ignoring small fees Add every cost to your list

You can stop mistakes by keeping good records and checking your numbers often.

Reviewing Costs

You should look at your fleet costs often. Set a reminder to check your spending every three months. Compare what you really spend with what you thought you would spend. Watch for big changes in fuel, electricity, or service costs. If you see costs going up, find out why. You might need to change when you charge or how often you do checks.

  • Use charts to show how costs change over time.
  • Share what you find with your team to help them do better.
  • Plan for new equipment or upgrades if you save more money.

Checking your costs often helps you stay on track and make good choices for your fleet.

By doing these steps, you can keep your fleet working well and save more money every year. You will also be ready if prices or rules change.

You can see how much you save each year by following the steps in this guide. Use your own numbers to check your yearly costs. The Mobile EV Fast Charger helps you cut costs and improve efficiency. To make your savings clear and actionable:

Switching to electric charging supports sustainability and keeps your business ready for the future. Start by reviewing your current costs and see how much you could save.

FAQ

How do you calculate your yearly savings with the Mobile EV Fast Charger?

First, add up all your diesel costs. This means fuel, maintenance, and compliance fees. Next, add your electricity and service costs for the Mobile EV Fast Charger. Take away the electric costs from the diesel costs. The answer is your yearly savings.

Can you use the Mobile EV Charging Station anywhere?

You can move the Mobile EV Charging Station to many places. Its design lets you set it up on highways, building sites, or in busy areas. You do not need a fixed power supply to use it.

What maintenance does the Mobile EV Fast Charger need?

You need to check the system often. Most jobs are just software updates and looking over the charger. You do not need to change oil or filters. There are fewer moving parts, so you spend less time fixing things.

Do you need special permits for the Mobile EV Charging Station?

You do not need emissions permits for the Mobile EV Charging Station. You must follow local safety and electrical rules. This is easier than getting permits for diesel generators.

How does downtime compare between diesel and electric charging?

You have less downtime with the Mobile EV Fast Charger. There are fewer breakdowns and charging is faster. This keeps your vehicles working more. Diesel generators break down more and take longer to fix.

Is the Mobile EV Fast Charger suitable for large fleets?

You can use the Mobile EV Fast Charger for big fleets. It has two charging guns, so you can charge two vehicles at once. High power means busy fleets wait less to charge.

What is the environmental benefit of switching to electric charging?

You help the planet by using electric charging. You do not need emissions checks and you help meet green goals. Cleaner energy makes the air better for everyone.

How often should you review your operational costs?

You should check your costs every three months. Regular checks help you see changes in fuel, electricity, or service costs. This keeps your fleet running well.