Eight gantry cranes. No grid access. A project running on diesel around the clock. We replaced eight generators with one Infinity Cube L hybrid BESS system and cut annual diesel consumption by over 288,000 litres.
LTA (Land Transport Authority)
February 2024
Singapore
PROJECT SNAPSHOT
In February 2024, Wai Fong Construction began an LTA project at a precast yard that had no access to grid power. The site needed continuous, reliable power for eight gantry cranes of varying capacities and a site office, running across full production hours.
THE CHALLENGE
Without grid access, the conventional response was a bank of eight diesel generators, one per crane, each sized for peak load. That arrangement meant constant fuelling runs, staggered maintenance schedules across eight separate units, and generators running below capacity for most of the operating day. Gantry cranes draw their heaviest current at startup then settle to lower average loads between lifts, which means generators sized for peak demand spend most of their runtime at inefficient partial loads.
Establishing a grid connection at a remote site typically takes 6 to 12 months for approval and construction. That timeline made temporary power the only viable path for project continuity.
x5 90kVA Diesel Generators
x1 250kVA Diesel Generator
x2 300kVA Diesel Generators
SITE CONSTRAINT
No grid connection available at mobilisation. Eight separate generators required, each dedicated to a single crane, with individual fuel schedules and maintenance intervals.
THE SOLUTION
By replacing the eight-generator bank with a single Infinity Cube L hybrid BESS system paired with one 250kVA synchronising generator, the site achieved the same coverage with a fraction of the equipment footprint and significantly lower fuel consumption.
x1 Infinity Cube L
x1 Synchronising Generator 250kVA
HOW IT WORKS
The Infinity Cube L operates as the primary power source. During normal operations, the battery system supplies power directly to all eight cranes and the site office. When the battery reaches a defined threshold, the synchronising generator starts automatically, supplies load, and recharges the Infinity Cube. Once recharged, the generator shuts down again.
The Infinity Cube L supplies all site power under normal loads. It handles the surge current drawn by each crane at startup, which prevents the demand spikes that force oversized generator selection.
When battery charge drops to a set threshold, the synchronising generator starts automatically. It supplies load in parallel and recharges the battery. When charge is restored, the generator shuts down without manual intervention.
Rather than eight generators idling at partial load through quiet periods, one generator runs in shorter, higher-efficiency bursts. Average generator runtime dropped by approximately 50% compared to an all-generator configuration.
RUNTIME REDUCTION
The hybrid configuration reduced average generator runtime by approximately 50%, which directly produced the fuel, cost, and emissions savings recorded over the project year.
OUR DELIVERY
As the authorised Infinity Cube distributor in Singapore, we handled the full deployment from mobilisation to ongoing servicing. Getting a hybrid BESS system running correctly on an active construction site requires more than equipment delivery. Commissioning, load synchronisation settings, and site team training all need to happen before the project goes live.
Supply of one Infinity Cube L unit and one 250kVA synchronising generator, delivered to site within the project mobilisation timeline.
On-site configuration of the energy management system to match the load profile of the eight gantry cranes and site office. Synchronisation settings between the Infinity Cube L and the generator were established and tested before the site went live.
Hands-on training for the site crew covering daily operation, monitoring, and basic fault recognition. The Infinity Cube system is designed for straightforward operation and the team was confident within the first session.
Scheduled servicing for both the Infinity Cube L and the synchronising generator throughout the project. Our 12-service-team network covers the site with a breakdown response commitment of under 3 hours.
We can assess whether a hybrid BESS setup makes sense for your load profile and project timeline. Talk to our team.
