Why smart businesses are turning to battery storage to cut energy costs

As electricity costs become increasingly volatile and more organisations generate their own renewable energy, battery energy storage systems (BESS) are transforming the way businesses buy, store and use electricity. Rather than relying entirely on the grid when demand and prices are at their highest, companies are beginning to take greater control over when they purchase electricity and how they consume it. The technology is not new, but the business case has never been stronger, writes Phil Wiltshire, contracts manager at Pensdown, the electrical people.

One of the biggest misconceptions about electricity is that it has a fixed price. In reality, wholesale electricity prices fluctuate throughout the day as demand rises and falls. Many commercial energy contracts now reflect these changes through time-of-use tariffs or flexible purchasing arrangements, allowing businesses to benefit from lower-cost electricity during periods of reduced demand, typically overnight.

Battery storage allows organisations to take advantage of these lower prices by charging batteries when electricity is cheapest and using that stored energy during the day, when demand and often prices, are significantly higher. It is a simple concept, but one that can have a meaningful impact on operating costs, particularly for businesses with high daytime electricity consumption.

Making Better Use of Solar Energy

For businesses that have already invested in solar photovoltaic (PV) systems, battery storage offers another significant advantage. Without storage, any surplus electricity generated during the day is typically exported back to the grid. While export tariffs provide some financial return, the value received is often considerably lower than the cost of purchasing electricity later in the day when solar generation has reduced or ceased.

Battery storage changes that equation. Instead of exporting surplus electricity, businesses can store it for use later, extending the value of their solar investment well beyond daylight hours.

For manufacturers, warehouses, offices, schools and many commercial premises where energy demand continues into the evening, this can significantly increase the proportion of electricity that is generated and consumed on site.

As the National Energy System Operator (NESO) continues its transition towards a cleaner electricity network, the ability to maximise locally generated renewable energy is becoming increasingly important. The organisation believes battery storage will need to expand by four- or five-times current levels by 2030 to support the UK's evolving electricity system.

This is because energy prices remain one of the most unpredictable operating costs facing UK businesses. While wholesale markets have stabilised compared with the extreme volatility experienced during the energy crisis, few analysts expect electricity prices to become entirely predictable in the years ahead.

Battery storage therefore, provides businesses with greater flexibility. Rather than purchasing all of their electricity at the moment it is required, organisations gain the ability to decide when they buy energy and when they use it.

This flexibility does not eliminate rising energy costs, but it can reduce exposure to peak pricing and improve budgeting by making electricity consumption more predictable. For energy-intensive businesses, even relatively modest reductions in peak electricity purchasing can generate meaningful savings over the lifetime of the system.

Improving Energy Resilience

Cost savings are often the primary driver behind battery storage projects, but resilience is becoming equally important. Many organisations rely on uninterrupted power to maintain operations. Manufacturing processes, IT infrastructure, refrigeration systems and critical business operations can all be affected by power interruptions or fluctuations.

Battery storage can provide an additional layer of resilience by supporting continuity during short-term outages or power disturbances. While the exact capability depends on the size and specification of the system, many organisations are now viewing battery storage as part of their wider business continuity strategy rather than simply an energy-saving measure.

Battery storage also plays an increasingly important role in helping businesses achieve their environmental objectives. By storing renewable electricity generated on site or charging batteries when the grid contains a greater proportion of renewable generation, organisations can reduce their dependence on electricity generated from fossil fuels.

As previously mentioned, the National Energy System Operator has identified battery storage as one of the critical technologies required to support Britain's transition towards a secure, affordable and low-carbon electricity system. As renewable generation continues to increase, storage provides the flexibility needed to balance supply and demand while making better use of clean energy that might otherwise be curtailed.

For businesses with net-zero commitments, battery storage can therefore contribute not only to financial performance, but also to wider sustainability targets.

Is Battery Storage Right for Every Business?

However, like any capital investment, battery storage is not a one-size-fits-all solution. The financial case depends on several factors, including energy consumption patterns, tariff structure, existing renewable generation, available space and future business requirements.

A manufacturing facility operating around the clock will have very different energy demands from an office building occupied only during business hours. Similarly, organisations with existing solar PV installations may achieve different returns compared with those relying entirely on imported electricity.

This is why understanding how a building uses energy is often the first step in assessing whether battery storage is likely to deliver value. Rather than asking, "Should we install battery storage?" the better question is, "How does our business consume electricity, and where are the opportunities to use it more intelligently?"

That said, across the UK and Europe, investment in battery storage is accelerating as governments, energy providers and businesses recognise the role it will play in supporting future electricity networks. SolarPower Europe forecasts substantial growth in battery deployment over the next five years as renewable energy becomes an increasingly dominant part of the energy mix.

For commercial organisations, the conversation is therefore becoming less about whether battery storage is part of the future and more about when it becomes commercially viable for their own operations.

As electricity markets evolve, businesses that can generate, store and manage their own energy are likely to be better positioned to control costs, improve resilience and reduce carbon emissions.

All this means that commercial battery storage is no longer simply an emerging technology. It is becoming an increasingly practical tool that allows businesses to use electricity more strategically.

At Pensdown, we work with commercial clients to assess their energy requirements and identify electrical solutions that support both operational efficiency and long-term sustainability. As battery technology continues to evolve, understanding how your business uses energy today could be the first step towards reducing costs tomorrow.

For more information visit: www.pensdown.co.uk