Why V2G Is a Must-Have in Your Energy Strategy

Electric mobility is expanding fast, and EVs are now an integral part of the energy landscape. They draw power, store it, and can give it back when the grid needs support. This is the idea behind Vehicle-to-Grid (V2G). 

If you’re new to the concept, you should first check our previous article on What is V2G and Why Does it Matters, which explains how V2G works and why it connects mobility with energy. 

This article looks at why V2G belongs in every modern energy strategy. It explains how V2G strengthens grid resilience, reduces peak demand, and supports renewable integration. 

What challenges does the energy system face today? 

Energy systems are changing faster than ever. Electrification is expanding across transport, heating, and industry. At the same time, the share of renewables in generation continues to rise. 

This shift brings clear environmental benefits but also operational complexity. Solar and wind power fluctuate with weather and time of day. When generation dips, the grid must find energy elsewhere. When output spikes, supply can exceed demand. 

Traditional grid infrastructure was not built for this level of variability. Upgrading it with large-scale storage and new power plants is expensive and slow. The result is a growing need for flexible, distributed energy resources that can respond quickly. 

This is where V2G becomes a practical tool. 

How does V2G support grid resilience? 

V2G turns electric vehicles into distributed energy storage units. Each connected EV can store renewable energy when supply is high and send it back when demand rises. 

When aggregated, thousands of these vehicles act as a single, flexible energy resource that can stabilise voltage and frequency across the grid. This capacity directly contributes to V2G grid resilience by adding flexibility without requiring new large-scale infrastructure. 

Key benefits for the grid include: 

• Frequency regulation. Vehicles can respond within seconds to maintain balance between supply and demand. 

  
  

• Voltage support. Local networks can stabilise power quality through controlled charging and discharging. 

  
  

• Peak shaving. During high-demand periods, connected EVs can discharge stored energy to reduce stress on the grid. 

  
  

• Backup capacity. Aggregated vehicles can provide reserve power for short-term interruptions. 

This makes V2G valuable not only to utilities but also to transmission system operators, distribution network companies, and regulators designing flexibility markets. 

What are real-world examples of V2G in grid application? 

V2G is no longer a theoretical concept. Across different markets, utilities and technology partners are showing how bidirectional charging can strengthen grids and make renewable energy more reliable. These examples illustrate how V2G is being applied in real energy systems today. 

1. Denmark: stabilising local networks 

The Parker Project in Denmark was one of the first to prove that aggregated EVs could provide frequency regulation services to the national grid. It showed that V2G fleets can deliver grid services comparable to traditional assets. 

2. The Netherlands: city-scale flexibility 

In Utrecht, a program involving Renault and We Drive Solar uses hundreds of bidirectional chargers connected to renewable energy. The vehicles store solar power during the day and release it during evening demand peaks. This reduces strain on the local network and supports city-wide renewable integration. 

3. United Kingdom: V2G in flexibility markets 

UK utilities and aggregators have integrated V2G fleets into flexibility markets. Trials have demonstrated how households and fleets can participate in grid services, reducing system costs and helping balance renewable variability. 

4. Japan: energy security and disaster readiness 

After years of V2G pilots, Japanese utilities are using bidirectional charging to support local grids during outages. The approach provides additional resilience in a region where natural disasters regularly disrupt power. 

Together, these projects show how V2G is evolving into a practical part of modern energy systems. They prove that flexibility can come from distributed assets rather than central infrastructure, and that connected vehicles can enhance both reliability and sustainability at scale. 

Why should utilities and regulators prioritise V2G? 

For utilities, V2G offers a path to build flexibility without costly new infrastructure. Distributed storage from vehicles complements existing assets and can defer grid reinforcement investments. 

For regulators, V2G offers a practical way to improve how energy systems use existing assets. Clear market rules can let EVs trade flexibility, reduce congestion, and support national energy targets. 

For transmission and distribution operators, V2G reduces congestion and provides tools to manage voltage and frequency locally. As electrification grows, these capabilities become essential to prevent overloads and maintain reliability. 

All in all, V2G grid resilience is a measurable outcome that supports security of supply and economic efficiency. 

Why is V2G flexibility cheaper than grid expansion? 

Traditional approaches to grid expansion focus on adding capacity: new substations, larger transformers, or grid-scale batteries. While necessary in some areas, these investments are capital-intensive. 

V2G introduces a complementary approach. The batteries already exist inside vehicles; they simply need to be connected and coordinated. This distributed model turns idle storage into active capacity, reducing the need for physical upgrades. 

For example, a fleet of 1,000 EVs with 60 kWh batteries represents 60 MWh of potential energy storage, enough to cover short-term demand fluctuations for a medium-sized town. Using V2G as part of a flexibility strategy helps grid operators meet peak demand at a fraction of the cost of new infrastructure. 

How does V2G help integrate renewables? 

V2G also plays a direct role in renewable integration. When renewable generation exceeds demand, EVs can absorb surplus electricity. When generation falls, they can release stored energy. 

This helps smooth the variability of renewables and reduces curtailment. It also improves utilisation of renewable assets, which increases the economic return on investment for both utilities and developers. 

Countries such as Germany, France, and the UK are now integrating V2G into renewable balancing programs, recognising it as a valuable component of flexible energy systems. 

What needs to happen for large-scale V2G? 

Bringing V2G into mainstream energy use depends on progress in three key areas: 

1. Standardised communication protocols. Open standards like ISO 15118-20 and OCPP 2.0.1 must be widely adopted so that vehicles, chargers, and grid systems can communicate efficiently. 
    

2. Market access. Regulators should guarantee that aggregated V2G capacity can participate in flexibility and ancillary service markets. 
    

3. Scalable software infrastructure. Utilities and charge point operators need data platforms that can handle large-scale integration and settlement with full transparency. 

Progress in these areas will decide how quickly V2G becomes a core part of the energy system. 

What is the outlook for V2G beyond 2025? 

Between 2025 and 2030, V2G will move from pilot scale to commercial deployment. Automakers are embedding V2G capability into new models. Utilities are running long-term flexibility programs, and grid operators are defining value streams for distributed storage. 

Growth will depend on interoperability and openness across the ecosystem. Systems must connect easily so that vehicles, chargers, and markets can exchange both energy and data. The result will be an integrated environment where mobility actively supports the grid, instead of adding load pressure.   

Conclusion 

V2G has moved beyond testing. It now supports grid stability, helps integrate renewables, and adds flexibility that improves energy reliability. 

At eMabler, we help organisations turn this potential into real capability. Our open EV charging platform connects vehicles, chargers, and energy systems through simple, standardised integration. 

If you want to explore how V2G can enhance your energy strategy or strengthen grid flexibility, get in touch with us. Together we can build an energy system where every connected vehicle contributes to stability and progress.