Why Do I Need a Battery Energy Storage System for My Site?

Date: 21/07/26

We have written a lot about BESS in this blog recently, and you may be wondering ‘why do I need a battery energy storage system for my site?’ 

It’s a question we get asked a lot here at Think Hire, but by the time we’ve finished explaining all the benefits, we find that the question usually changes completely to ‘how have I managed without a BESS until now?’

Battery energy storage systems cut fuel and hire costs, improve environmental performance, reduce noise and help you manage the peaks and troughs of your site power better than ever before. That’s why you need a BESS for your site.

Let’s take a look, in detail, at eight reasons why you need a BESS on your site:

  1. Saving fuel

Battery energy storage systems help you to run your diesel generators more efficiently. Instead of working flat out all day, generators run at a more efficient level, and only when required to top up the battery. This means they use less fuel when they’re running and they run for less time.

  1. Integrating renewables

BESS can help you save even more on fuel costs by integrating renewable energy, such as the Solartainer Versatile, giving you all the benefits of free, sustainable energy, with none of the drawbacks.

  1. Saving on operating costs

By running your generators less, you’ll also save on a range of associated costs, such as servicing, oil and filters, maintenance and refuelling costs. Individually, these may seem insignificant; over the course of your project, they soon add up.

  1. Saving on hire costs

Because a battery energy storage system runs your generator more efficiently and effectively, you won’t need to hire such a large unit. By storing energy for when it is needed, BESS can meet bigger peak demands using smaller generators. This saves you money on hire costs and transport.

  1. Cutting emissions

By cutting generator run time and facilitating renewable energy, battery energy storage systems significantly reduce emissions and particulate matter. This not only helps you to comply with strict environmental standards, but it also helps you achieve your own net zero goals, improving your company’s image and attracting more work from clients that value this commitment.

  1. Improving power distribution

Most sites vary in their power demands through the day, with peaks during start-up and when large machinery or cranes are in use. By storing energy during quiet periods, battery energy storage systems take sudden load surges in their stride, ensuring constant, reliable power, without voltage fluctuations, and reducing strain on your equipment.

  1. Eliminating overnight noise

Once charged, battery energy storage systems operate silently, so they can be used to power sites overnight without disturbing neighbouring properties. This helps your project comply with noise regulations and planning conditions, and keeps the local population onside during the build. BESS also reduce noise levels during the day, creating a better working environment on site.

  1. Improving efficiency

Think Hire battery energy storage systems come with state-of-the-art energy monitoring and telemetry. This gives you access to real-time data on your energy use, costs and emissions from anywhere on site, or anywhere else in the world, helping you to monitor and improve your energy use, saving even more.

How have you managed without?

If you’re now wondering how you’ve managed without a BESS, don’t worry, Think Hire are here to help. We manufacture our own units, in a range of sizes from 45kVA / 45kWh to 540kVA / 676kWh, with a 1000kVA BESS in development. All BESS can be linked to create exactly the power and capacity your site requires.

To enjoy all the benefits of BESS today, call Think Hire on 0330 133 2222, or complete our contact form online, and we’ll show you the BESS solution you need to save money, cut emissions and noise, and make your site power more reliable and efficient than ever before.

Frequently asked questions about battery energy storage systems

Yes. A BESS can be run entirely on renewable energy. However, in most practical applications, the energy system includes a diesel generator as a back-up power supply to the BESS to ensure dependable energy 24/7.

A BESS can cut diesel fuel costs by as much as 80%, as well as reducing generator hire costs and the cost of generator servicing, maintenance and consumables.

The size of BESS required depends on the peak and overall energy demands of your site. The expert team at Think Hire will perform an energy audit on site to work out exactly what you need for efficient, cost-effective power.

Yes. Modern commercial BESS units come with built-in temperature controls to avoid overheating; they have fire detection and suppression systems, and they constantly monitor energy distribution, with failsafe features to cut power if there is a fault.


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