The Future of Mobile Power: Are Battery Storage Units the Next Big Thing? 

As the UK and Ireland accelerate towards net-zero targets, the energy landscape is undergoing a seismic shift. Diesel generators have long been the backbone of mobile power, but a new contender is emerging: Battery Energy Storage Systems (BESS). With sustainability, efficiency, and innovation at the forefront, could battery storage be the future of mobile power? 

Battery storage units are no longer just a futuristic concept - they’re here, and they’re making waves. These systems store excess energy and release it when needed, offering a cleaner, quieter, and more efficient alternative to traditional generators. 

At Finning Power Rental, we’re proud to offer cutting-edge solutions powered by Cat® Battery Energy Storage Systems (BESS). These systems are designed to support a wide range of applications—from construction sites to remote infrastructure - by balancing large site loads and ensuring consistent power quality. 

The Cat BESS can store surplus energy from diesel, gas, solar, wind, or even hydrogen blends, making it a versatile option for hybrid setups. It’s not just about backup power; these systems enable grid stabilisation, energy time-shifting, and even participation in grid services markets, offering financial and operational benefits. 

Finning’s integration of Cat BESS into rental fleets means customers across the UK and Ireland can now access scalable, flexible, and sustainable power solutions tailored to their needs. Whether you're looking to reduce emissions, cut fuel costs, or improve energy resilience, battery storage is no longer a future concept - it’s a present-day solution. 

At Finning Power Rental, we understand that the transition to fully electric isn’t one-size-fits-all. That’s why hybrid solutions - combining diesel generators with battery storage - are gaining traction. Caterpillar’s recent innovations, such as the retrofitted Cat 972 wheel loader, demonstrate how hybrid systems can deliver zero-exhaust emissions for hours, then seamlessly switch to generator power when needed. 

This flexibility is crucial for industries like construction, events, and utilities, where power demands fluctuate and reliability is non-negotiable. 
The Benefits of Mobile Battery Storage. 

Here’s why battery storage is becoming a game-changer for mobile power: 

• Lower Emissions: Ideal for low-emission zones and sustainability-conscious projects. 
• Reduced Noise: Perfect for urban environments and events where noise pollution is a concern. 
• Fuel Savings: Batteries reduce generator runtime, slashing fuel costs. 
• Smart Integration: Modern BESS units come with intelligent controls, enabling remote monitoring and seamless integration with existing systems. 
• Mobility: Units are designed for easy transport and deployment, making them ideal for temporary or remote sites. 

While the benefits are clear, battery storage isn’t without its challenges. Initial costs can be higher, and energy density limitations mean batteries may not yet replace generators for high-load, long-duration applications. However, as technology advances and costs fall, these barriers are rapidly diminishing. 

With government incentives, tightening emissions regulations, and growing demand for sustainable solutions, the UK and Ireland are fertile ground for battery storage adoption. Whether it’s powering a festival in Dublin or a construction site in Birmingham, BESS offers a cleaner, smarter way to keep the lights on. 


At Finning Power Rental, we’re committed to helping our customers navigate the energy transition. Whether you're exploring hybrid systems or considering a full shift to battery storage, our team is here to guide you with expert advice and cutting-edge solutions.