Calculating savings with ev.energy

Our calculations are based on the average miles driven by a UK driver, national energy pricing statistics, and data averages from the 4 million+ charging sessions that have taken place through the ev.energy app between 01 January 2020 and 01 May 2023. See a full breakdown of the data that makes up this saving calculation below. All usage statistics are based on an average UK EV driver who drives 9,400 miles a year at an efficiency of 3 miles per kWh.

If you have any questions or would like to understand in more detail, please contact us here.

We calculate Smart Charging Savings by showing how much money you save on your energy consumption when you use ev.energy’s technology to shift your charging from ‘Peak’ energy pricing windows to ‘Off-peak’ pricing windows.

‍Energy Pricing
‍As of 20th October, 2023, national domestic energy pricing is at an average of £0.28 per kWh (up from £0.28 kWh in October 2022). Peak and Off-Peak charging rates are based on the national average across a rang of energy providers in the UK (£0.33 Peak rate and £0.09 Off-Peak rate). Please note: Our calculations do not account for the daily standing charge that users may pay in addition to their energy costs.

‍Peak and Off-Peak Times
‍The most frequent peak times tend to be weekdays between 6pm-9pm, however there is no fixed rule. Off-peak can be at any time, depending on the weather and renewable generation on the grid. Often in the UK, this is overnight when there is an abundance of wind, or around lunchtime at the weekend when the sun is shining. At ev.energy, we take care of tracking this complexity for you, ensuring you always charge at the cheapest and greenest time.

ev.energy Technology Capabilities
Through multiple trials and ev.energy app data, we have shown that ev.energy has the capability to shift energy from the average peak service window up to 100% (6pm-9pm). The above calculations are based on a 97% shift in energy from peak to off-peak pricing (Bloomberg ‘A review of real-world data from ev.energy’s smart charging platform’, October 2021).

In our Solar Beta Trial (N=356), the top 10% of participants carried out an average of 40% of their annual charging using the energy generated from their home solar with an average array size of 4.5kW between 01 June 2022 and 30 June 2022. Our data shows that Solar Smart Charging is most effective from March to November based on the average UK solar array. This has been accounted for in our annual savings calculation.

ev.energy is paid by energy networks to shift energy consumption from peak to off-peak windows. We give this back to our customers in the form of reward points to spend on their energy bills or through retailers.

‍Generating Points
‍ev.energy users generate 1 reward point for every charge over 7kWh.

‍Redeeming Rewards
‍You will need 30 points to earn £5 in rewards as a regular ev.energy user.

‍Average Earnings
‍Using the average UK EV driver, we have taken the average consumption of our 3 million charging sessions.

Carbon savings are measured in kg C02 per kWH. To calculate this statistic we first measured the difference between the carbon intensity of managed and unmanaged charging (Smart and non-smart). This was followed by calculating the total C02 kg saved divided by kWh of energy delivered to result in kg C02 per kWH.
Using real driver data, collected from the 12mths prior to November 06 2023, we reached the following:
299,818 / 22,518,600 = 0.01331 Kg of C02 per kWh (13 grams)

‍Our solar charging feature enables drivers to have a virtually zero carbon charge on their EV when using Solar Only mode in our app. Each solar + EV setup is slightly different but to reach an average we have measured the carbon intensity between solar charging and unmanaged charging.
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These statistics are based on UK energy market data collected in October 2023.