Hotel Nomad France

This project demonstrates how a tower crane can operate on a limited grid connection (32A–63A) through the intelligent use of battery buffering.

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The challenge

During the construction of the new Hotel Nomad, near Dijon station, Eiffage was confronted with a severely limited grid connection.

Only a "tarif bleu" grid connection was available at the site.
A heavier "tarif jaune" connection was not possible within the project planning.

This limited connection was insufficient to directly power the site and the tower crane (Liebherr 132 EC-H 8).
A traditional solution using diesel generators would have entailed additional costs, noise pollution, and operational complexity, which are undesirable in an urban environment.

The challenge was clear:
reliable power for the tower crane, without a heavy grid connection and without downtime.

The goal

Eiffage sought a solution that:

• The tower crane could be supplied with power continuously and safely.
• Could operate on the basis of a limited grid connection
• Plug & play ready to use, without complex installation
• Quiet and low-emission operation, suitable for an urban construction site
• Complete operational certainty provided for yard planning

The solution

Sodemat opted for the Neargrid Boost 80.

The Neargrid Boost served as a local microgrid solution on the construction site:

• The limited power connection was used to continuously recharge the battery.
• The Neargrid Boost supplied the necessary peak power to the tower crane.
• Voltage quality and power peaks were fully buffered and stabilized.
• The tower crane could rotate as if it had a heavy power connection.

Technical configuration:

• Product: Neargrid Boost 80
• Incoming power supply: limited grid connection (“tarif bleu”)
• Application: Liebherr 132 EC-H 8 tower crane

The installation was completely plug & play and quickly operational, without impacting the site schedule.

The result

Thanks to the efforts of Neargrid:

• Could the tower crane continue to operate fully electrically and reliably?
• Was there no need for a heavier grid connection?
• Was diesel completely avoided for this application?
• Did the shipyard remain quiet, low-emission, and operational?
• Did Eiffage not face a risk of downtime due to capacity constraints?

The Neargrid Boost proved once again that even with limited grid capacity, a construction project can continue to run smoothly without compromising reliability.

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