The Peak Power 200 flywheel enabled a WOLFF tower crane at Dubai Harbour to run on a downsized 200kVA generator instead of a 500kVA diesel unit – delivering significant fuel and emissions savings even in extreme heat conditions where battery systems struggle.
Clients:
McLaren Construction
Dubai Harbour Multi-storey car park
Industries:
Applications:
The PP200 saved over 5,700 litres of diesel and 15.3 tonnes of CO₂, which resulted in approximately 15,300 AED in reduced fuel costs, alongside lower generator rental fees and fewer fuel deliveries.
Dubai Harbour’s multi-storey car park project, led by McLaren Construction, required continuous operation of a WOLFF 8060.25 Cross in one of the harshest environments on earth. With summer temperatures soaring to nearly 50°C and dust storms common, traditional diesel generators struggled to deliver reliable peak power. In such conditions, generators lose capacity (known as “de-rating”), and battery-based systems demand heavy cooling through HVAC, leading to parasitic energy losses and frequent maintenance issues.
Normally, the WOLFF 8060.25 Cross would require a 500kVA diesel generator running 24/7 to support both lifting operations and critical aviation lighting. This setup meant high fuel consumption, significant emissions, a large system footprint, and costly logistics for continuous fuel delivery.
The introduction of the PP200 delivered impressive savings in just the first month:
Over the planned 8-month project duration, the system is expected to:
The Dumarey Peak Power 200 proved its value by enabling a smaller generator to power heavy crane operations around the clock in Dubai’s extreme climate. With 100% uptime on this application and significant economic and environmental benefits, the system showcased its suitability for demanding construction environments worldwide.
Dumarey Green Power extends thanks to the project collaborators who made this success possible: Wolffkran for crane expertise and installation support, Byrne Rental for providing temporary power, and the McLaren Construction team, led by Paul O’Rourke, for their leadership in adopting innovative technology.
To address these challenges, Dumarey Green Power deployed the Peak Power 200 (PP200) flywheel energy storage system. The PP200 stores energy kinetically and instantly releases short bursts of power when demand peaks. This innovation allows cranes and other dynamic equipment to be powered by a much smaller generator without compromising performance.
Unlike batteries, the PP200:
On-site at Dubai Harbour, the WOLFF 8060.25 Cross was paired with a downsized 200kVA generator supported by the PP200. This reduced generator capacity by 60% compared to the standard 500kVA setup. The system footprint was also significantly reduced, saving valuable space on this busy site.
The system operated continuously without fault. Despite the long operational hours typical of Middle Eastern sites, the PP200 remained stable, efficient, and maintenance-free throughout the summer trial period.
High power low energy flywheel energy storage system, ideal for tower cranes
The system enabled a generator downsizing from 500kVA to 200kVA
Lower operating cost guarantees better ROI for project partners
The downsized generator in conjunction with the flywheel guaranteed a stable power supply, also over night for parasitic loads
litres of diesel saved first month
>
tonnes of CO₂ avoided each month
AED in reduce fuel costs in first month
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