Does a Battery Energy Storage System Save More Than Fuel?

5 Aug, 2026
Does a Battery Energy Storage System Save More Than Fuel?

Yes, battery energy storage systems can help you make significant savings on a wide range of operating costs above and beyond your savings in generator fuel. 

BESS solutions are a highly popular way for site operators to significantly reduce generator fuel costs. By storing efficiently generated energy for later use, they avoid the need to run generators constantly and inefficiently, cutting fuel costs by as much as 80%. However, these fuel efficiencies are just the start of the savings. 

Ways you will SAVE with a BESS 

From staff savings to extended equipment life, from less downtime to more attractive tenders, battery energy storage systems can make a big difference to your bottom line in ways you may never have considered. 

SAVE on equipment costs 

Battery energy storage systems not only make your whole local energy system more effective and more efficient, but they also protect connected equipment too.

  • SAVE on hire and transport costs – by using BESS solutions, you can meet the same energy demands with a smaller generator. This will be cheaper to hire and incur lower transport costs.

  • SAVE on generator maintenance – less generator runtime means less fuelling and maintenance and fewer consumables like oil and filters.

  • SAVE by extending equipment life – by delivering constant, reliable, even energy supplies, battery energy storage systems extend the lifespan of electrical equipment on site, without the strains of damaging power fluctuations like surges and sudden drops.

SAVE on energy

Instead of relying on costly diesel generators, battery energy storage systems give you access to off-peak grid energy and free renewable energy, all managed at peak efficiency.

  • SAVE by using cost-effective grid power – using a BESS to store mains energy means you can access the grid to charge the batteries at off-peak rates, and deliver that low-cost power at times when you would normally pay peak prices.

  • SAVE by integrating renewables – battery energy storage systems are ideal for levelling out the variable nature of sustainable energy, such as solar power from a Solartainer Versatile. BESS solutions can store this ‘free energy’ during the day for use overnight, making renewable energy more accessible and reliable. 

  • SAVE with state-of-the-art energy management – all Think Hire battery energy storage systems come with cutting-edge smart energy management to help you monitor and optimise your site power use.

SAVE on operating costs

A battery energy storage system can also help to reduce broader operating and business costs, helping you to work more efficiently and effectively and even win more business.

  • SAVE by reducing downtime – battery energy storage systems deliver dependable power without interruptions, so there’s less costly downtime on site. BESS protect you from grid failures and power cuts, the intermittent nature of renewables and even generator failures.

  • SAVE by extending your working hours – by avoiding the use of noisy generators during overnight works, BESS solutions allow you to extend working hours without disturbing neighbours or violating planning consent. This helps complete projects quicker and more cost-effectively.

  • SAVE on compliance costs – by reducing generator runtime, BESS solutions cut emissions. This can result in significant savings in areas where pollution is financially penalised through charges and fines. 

GROW by winning more business

Using a BESS to reduce the environmental impact of your working practices will make your tenders more attractive to climate-minded companies, helping you to compete more effectively for new business. It will also allow you to pitch for environmentally sensitive work without having to change the way you power your site.

Ready to make savings with BESS?

You can start making savings right now, right across the board, with battery energy storage systems from Think Hire. We are leading the way in BESS technology by manufacturing industry-leading BESS solutions that will make serious savings for sites large and small. From 45kVA / 45kWh to 500kVA / 564kWh, we have a wide range of battery energy storage systems to suit any power demands on any project.

Our experienced team will be happy to help you choose the right BESS solutions, with a full site energy audit and expert advice on your renewable options and the best BESS for your needs. To start saving on your site today, and every day, get in touch with the Think Hire team today.

Frequently Asked Questions

Between 50% and 80% is the typical fuel saving when using a battery energy storage system, although many Think Hire customers report even greater savings than this.

Yes. The right battery energy storage system will easily pay for itself in both generator fuel savings and the many other savings they bring. You can increase these savings by using renewable energy as part of your hybrid power generation set up.

Yes, Think Hire has a range of BESS units available, from 45kVA / 45kWh to 500kVA / 564kWh to suit all sizes of site and all levels of power demand. Units can be combined for larger sites of higher energy use.

The right BESS depends on your peak and average power demands, as well as the source of your energy generation. You should seek advice from an electrical expert to assess your power needs. Think Hire will perform a site energy audit to help you specify the correct BESS solutions for your needs.


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