Mobile Energy Storage Powers Electric Operations

in Norwegian Tunnel Construction

Electrifying tunnel construction involves more than putting electric machines to work.

It also requires a reliable power supply in an environment where space is limited, access can be difficult and several types of equipment must operate side by side.

In a Norwegian tunnel project, our mobile energy storage system is being used to support electric construction operations, providing DC fast charging for electric trucks and excavators, alongside 400V three-phase AC power for tunnel machines.

Supporting Electric Equipment Underground

Air quality and noise are persistent challenges in tunnel construction.

Diesel-powered machinery adds exhaust emissions to an environment where ventilation is already critical, while engine noise contributes to demanding working conditions.

Electric equipment offers a practical way to reduce these impacts at the source. With no exhaust emissions during operation and lower operating noise, electric trucks and excavators can help create a more comfortable working environment underground.

However, putting electric machinery into service also changes how energy must be supplied on site. High-power vehicle charging and the electricity demands of construction equipment must be accommodated within the same working environment.

One Mobile System for Different Power Demands

At the project site, the mobile energy storage system provides DC fast charging for electric trucks and excavators.

lts 400V three-phase ACoutput powering to the tunnel machine, supporting applications beyond vehicle charging.

Bringing these functions together allows the system to serve different operational requirements without depending entirely on separate power installations for each application.

Its mobile design also offers flexibility as work progresses through the tunnel. With a plug-and-play setup, the unit can be deployed where power is required, helping reduce the complexity of establishing temporary electrical infrastructure in a confined construction environment.

Bringing Power Closer to the Work

For contractors, electrification is not only a matter of choosing electric machinery. Charging access, available power capacity and the practicalities of moving equipment around the site all influence how effectively electric machines can be integrated into daily operations.

Mobile energy storage addresses part of this challenge by acting as a local power hub. It combines substantial energy capacity with high-power output, supporting rapid vehicle charging and the operation of power-intensive equipment. Where grid capacity is restricted or permanent connections are impractical, it can provide an additional layer of flexibility within the site's overall energy setup.

The Norwegian tunnel project illustrates the role mobile energy storage can play in this transition: connecting electric machinery with the power infrastructure needed to put it to work.