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New report identifies detailed opportunities and costs from Vehicle-to-Grid charging of EVs

Fri 10 May 2019 | Back to news list

A new report from Cenex finds that bidirectional Vehicle-to-Grid (V2G) charging, which sees vehicles provide energy from their batteries to the grid when plugged in, can deliver greater value and revenues than even unidirectional Smart Charging.
The Cenex report provides a detailed analysis of the costs and opportunities of V2G charging of electric vehicles (EVs). It indicates that the potential value which can be earned by V2G is highly dependent on the customer, with certain customer types seeing much greater value than others.
However, it finds that the average V2G chargepoint could generate £186 of additional value per year compared to unmanaged charging, through a combination of energy bill savings and additional revenue from grid services. When compared to unmanaged charging, Smart Charging captures between 40% to 80% of the potential value of V2G. If V2G is unable to access grid services, then Smart Charging gives you the upper range of that value.
However, one of the findings shows that these revenues increase the longer vehicles spend plugged in. This means that V2G chargepoints where EVs are connected for 75% or more of the time could generate £436 per annum of savings, compared to unidirectional Smart Charging.
Based on an assumed one million EVs in the UK with this plug-in behaviour, this group alone has the potential to generate an annual revenue of £436m.
The largest percentage of V2G revenues come from providing grid services, such as Firm Frequency Response (FFR). However, there is significant risk to grid service revenue for V2G, with at least half of the revenue at risk from falling FFR prices.
Commenting on the report, Robert Evans, CEO of Cenex said: “While there has been an increasing focus on Vehicle-to-Grid charging, until now there has been a lack of clear data on its costs and opportunities, holding back the ability of organisations to build effective business cases.
"This report is the first step to bridging this information gap, and it shows multiple use cases where V2G delivers additional revenues and value above Smart Charging, especially around grid services. By making this information available Cenex aims to support the increased uptake of low emission vehicles and thus accelerate the move to a zero-carbon future.”
The report is part of Cenex’s work with Innovate UK. Further analysis and reports from related projects will be published shortly.
Note: The LowCVP is convenor of the Electric Vehicle Energy Taskforce (EVET) has been formed at the request of Government to make recommendaions to Government and industry to ensure that the UK energy system is ready for and able to facilitate and exploit the mass take up of electric vehicles. More information here.

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