A battery that costs over a million pounds might sound like something fit for a NASA spacecraft—but at HG Construction, it’s powering something much more down to earth: tower cranes.
The UK-based construction firm has invested £1.2 million in a Revolution Battery from Dumarey Green Power. It's a decision that may seem bold at first glance, but one that’s already proving smart, sustainable, and cost-effective. After successful trials earlier this year, HG is now using this cutting-edge energy system to replace diesel generators on sites across London.
Here’s what makes it so game-changing: on two of their projects, a single Revolution Battery powered a pair of Moritsch RTL 195 luffing cranes using just a 32A three-phase mains connection. Previously, the same cranes needed two 200 kVA diesel generators running 50 to 60 hours a week.
The difference? Startling. Weekly energy costs dropped from £1,400 per crane to just £80. That’s a 94% reduction. Carbon emissions fell just as dramatically—from 3,000 kg to under 200 kg per crane per week. On top of that, the battery system was smaller, quieter, and more reliable than diesel-powered alternatives.
HG’s CEO Adam Quinn put it simply: “The results speak for themselves.” He praised not only the efficiency and environmental gains but also the fact that the technology was developed locally, aligning with the company’s commitment to supporting British innovation and supply chains.
But this isn’t your average battery. Unlike traditional battery systems designed to store massive amounts of energy for high peak power, the Revolution Battery takes a different approach. It separates energy storage from power output, which allows it to deliver high output with minimal stored energy. The result? A compact, efficient system with fewer battery cells—and lower embedded emissions.
For site managers like Ben Harris, who oversees operations in North London, the practical benefits are obvious. “We’ve got residential homes just down the road. When we were using diesel, the noise was constant. Now, when I leave site in the evening, the loudest thing I hear is the scaffolding creaking in the wind.”
The system also offers flexibility. On sites without access to mains power, the battery can be topped up with a 40 kVA generator—one that only needs to run for about three hours a day. According to trial data, even this backup setup drastically reduces both emissions and fuel use compared to full-time diesel generators.
Dumarey Green Power’s Sales Director, Alex Keys, believes this type of technology is the future of the industry. “The construction sector faces big challenges ahead to meet emissions targets. Efficient battery systems like this can make a huge impact. HG Construction is setting a new standard for what sustainable construction should look like.”
And they’re not alone. In southern England, architect Emma Collins recently started using battery-powered systems on a housing development. “We used to lose hours waiting for the diesel generators to cool or get serviced. With the new setup, everything’s smoother—and the team’s morale is better too.”
What this story shows is that going green doesn’t always require sweeping policy changes or billion-dollar infrastructure. Sometimes, it’s one crane at a time. One project manager noticing the quiet. One architect seeing the gains in real-time.
For HG Construction, the Revolution Battery isn’t just a gadget—it’s a step forward on their path to low-carbon building. As Adam Quinn put it, “We’re serious about decarbonizing our operations. This investment helps us get there—while saving money and improving how we work.”