Open menu

Industry Insights

The benefits of battery energy storage on EV charging sites

The convergence of increasing energy requirements; renewable energy generation and EV charging require a different way of thinking.

Battery energy storage systems (BESS) will play a vital role in supporting this energy shift.


The UK’s energy demands are growing. By 2050, energy requirements will have doubled from a 2018 baseline. At the same time, the way we generate and use energy is undergoing radical change. As soon as 2025, Britain could be experiencing periods when 100% of its energy is generated from renewable sources, as we move towards net zero power generation by 2050.

Meanwhile, electric vehicles (EVs) will place new and different demands on the grid. By 2030, the UK Government expects there to be 300,000 public EV charge points – equivalent to almost five times the number of fuel pumps on our roads today.

The convergence of increasing energy requirements; renewable energy generation and EV charging require a different way of thinking. Battery energy storage systems (BESS) play a vital role in supporting this energy shift and are becoming more commonplace on EV charging infrastructure sites. But what are the key benefits that they can bring when deployed together with EV charging:

  1. Overcoming power constraints

 As more vehicles need recharging, depots and workplaces require more power. Many commercial premises do not have the headroom required to add more chargers without a DNO upgrade. Similarly, public EV charging hubs are already drawing down significant amounts of power and may not be able to either add more chargers or increase the number of rapid chargers without upgrading their grid connection. Batteries provide the guarantee of charging supply and support high-power charging to a site that does not have the power that chargers require.

When a site is constrained and requires additional power at certain times of the day, a battery energy storage system can act as a reservoir to supplement the power drawn from the grid. This is especially useful for charging hubs which can experience significant peaks and troughs in demand. Energy storage enables the required functionality whilst ensuring that a business does not breach its supply and connection conditions and incur additional charges.

Download our free e-guide today.

Packed full of information to help drive your business into the future, download our guide to EV charging and battery energy storage today.

  1. Deferring infrastructure upgrades

With many EV charging facilities still to achieve maximum use, the short-term business case may not justify major investments in infrastructure upgrades. In instances like this battery energy storage can provide a short to mid-term grid load management solution until the long-term business case can justify the major upgrade.  Even when a connection upgrade is required the cost may be significantly reduced by using storage to manage any extreme load spikes.

  1. Decarbonising EV charging

With the growing popularity of PV, we are already seeing the integration of renewable generation with EV charging infrastructure, helping to decarbonise mobility. BESS can help optimise the value of on-site renewables by storing surplus ‘green’ energy to make it available as and when it is required. This also boosts the return on investment from renewables.

  1. Reducing costs

Maximising on-site renewable energy can also bring financial benefits by increasing the revenue potential of the site and reducing the cost of supplying electricity to the chargers.  This can make a substantial improvement to the business case.

For organisations that are providing charging for a fee, the introduction of battery energy storage over a DNO upgrade can also help to reduce the payback period of infrastructure investment.

BESS can be a cost-effective solution with modelled payback periods, making it easy to build the business case. Learn more about how we can support you in financing your system.

Connect with us

Get in touch with our team to discuss whether battery energy storage can work for your business.