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Three benefits of battery energy storage systems


Battery energy storage is becoming an increasingly used component of the energy mix. But how does it actually work and what are the use cases? In this article we look at the three main benefits these innovative systems can deliver.

At Connected Energy, we like to categorise the benefits into three main categories: site optimisation, problem solving and revenue generation. In each of these use cases a stationary energy storage system adds value and delivers a return on investment whatever the customer’s objectives.

  1. Site optimisation

Currently the most common application for BESS is optimising a site’s power generation and/or energy usage. In plain English, this means using batteries and an intelligent management system to make the most of on-site renewables or helping reduce overall expenditure on energy.

A BESS controls the way a site uses power by integrating the battery with the existing energy system to flexibly store and discharge energy.

Connected Energy integrates with renewables like solar and wind to store excess energy at times of low demand so it can be used later. This optimises the energy used from renewables, reducing energy bills and a site’s carbon emissions from energy use. However, the BESS can go even further. By reacting to all the energy assets on site, the system can be programmed to react to the local situation – storing power when it’s available and discharging that power wherever on site it is needed. You can find out more about the benefits of this system by visiting our E-STOR page.

Furthermore, building owners can use BESS to reduce energy bills. Connected Energy’s smart systems can respond to changing electricity tariffs in real time, charging the batteries on low-cost, off-peak tariffs, then discharging that energy for use when tariffs are at their peak.

2. Solving a problem

Ultimately, battery energy storage systems are problem-solvers – essentially, they manage grid load demand by smoothing out energy use over the day and night.

Increasingly our battery energy storage systems are also used to support EV charging hubs. The battery can draw down power from the grid or from on-site renewables during periods of low demand, then provide that power to the charging points during peak periods. On sites with limited available power, this mitigates the need for an expensive grid infrastructure upgrade, while still providing the energy needed for effective EV charging during busy periods when lots of vehicles are plugged into the hub. Read more about how Connected Energy supports EV charging in our case studies.

Similarly, some buildings have spikes in load which require either a costly grid connection upgrade from your district network operator (DHO) or a BESS to provide that extra energy on demand. On a more micro level you can eliminate the use of diesel generators at peak periods, reducing carbon emissions.

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3. Generating revenue

In the UK, grid operators pay providers who can help it manage peak demand in specific areas – this is called grid balancing.

Battery energy storage systems are an ideal method of improving the resilience of the local grid. In essence, the battery works like a sump, as it is charging and discharging constantly to help keep the grid balanced. This capability is going to become increasingly important as we transition to more renewable energy generation.

However, National Grid does not buy grid balancing services from individual small suppliers. You have to join a demand response aggregator, which is a local collective of providers. We can introduce you to the right aggregator for you, and you can read more about aggregators here.

Free feasibility study

For all three use cases above, we offer prospective clients a free feasibility study to show you exactly how a battery energy storage system could work. We build a digital twin of your site or proposed application, in order to accurately demonstrate the BESS and what return on investment you can expect.


Connect with us today

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