Powering Innovation at WOLFFKRAN Ltd

WOLFFKRAN is one of the world’s top tower crane manufacturers. Thanks to HDM Energies, WOLFFKRAN's crane rental facility in Sheffield, UK, is now powered by 70.8 kW of clean energy. With WOLFFKRAN’s commitment to sustainability, this project is a perfect example of how companies in the construction industry can lead the way toward a greener future while enjoying long-term savings through a Power Purchase Agreement (PPA).

This project has been made possible through the collaboration of our HDM Energies team and the staff at WOLFFKRAN, who ensured the project ran smoothly with no disruptions to the site’s operations. The entire installation was completed in just two weeks, during which we equipped WOLFFKRAN’s facility with 120 high-efficiency 590W solar panels. To optimise performance, we included a SolaX inverter, renowned for its efficiency and reliability in managing energy output.

The system went live in October 2024. Since then, HDM Engeries have provided WOLFFKRAN with over 69MWh of clean, green, cheaper electric covering 24% of total load overall but over 40% in summer months.

This has reduced carbon emissions by over 12T* and reduced grid import costs by more than £18,000** giving the site an overall savings of almost £8,000 to date, once the PPA is considered.

*Based on 0.177kg/CO2/kWh
** Based on £0.26/kWh electric cost.

By switching to solar, WOLFFKRAN has reduced its carbon footprint and enhanced its sustainability credentials in an industry where every step toward greener practices counts. This incredible system generates a significant saving, at no cost to them. That’s money that can be reinvested into their business and employees, helping them maintain their position as a leader within the construction industry. This solar installation powers their facility with clean, renewable energy, reducing their dependence on the national grid and protecting them against rising electricity prices.

Niall Conroy, WOLFFKRAN Sustainability Programme Manager, commented:

I'm very excited about the impact our new solar system will have on our sustainability goals. It’s projected to cover around 19% of our top yard’s electricity needs, peaking at up to 36% in July, which translates to an annual savings of approximately £20,000 and a reduction of 19 tons of CO2 emissions. By generating our own power, we’re decreasing our reliance on grid electricity, which includes carbon-emitting sources like gas and biomass, and moving closer to a sustainable future.

At HDM Energies, we’re seeing more companies like WOLFFKRAN making the move to solar, not just to reduce their carbon footprint but to ensure long-term financial savings and stability. Our business is built around a mission to make solar energy accessible to businesses of all sizes, at zero capital expenditure (capex). By entering into a Power Purchase Agreement (PPA), businesses are enjoying the benefits of clean energy while paying a fixed, low-cost rate for the electricity they use. It’s a win-win for businesses, especially those in sectors like construction, where energy costs are a major factor.