Temporary power on infrastructure projects is rarely simple. Road and rail corridors, bridge construction, pipeline installations, and tunnelling operations all have power loads that change week to week as work progresses across a site. Getting the power strategy right from the outset saves money on fuel, reduces downtime, and keeps your crew and equipment moving. Getting it wrong means oversized generators idling at low load, undersized units tripping under peak demand, or costly emergency hires mid-project.
Why infrastructure projects present unique power challenges
Unlike a fixed building site with a well-defined footprint, infrastructure projects are linear. Power loads move along the corridor as gangs advance, which means a fixed connection point quickly becomes impractical. You may be running multiple active zones simultaneously: a dewatering pump at one end, a concrete batching plant in the middle, and temporary lighting and welfare facilities across the full length. Each zone has its own load profile, and those profiles shift as the project matures. Planning temporary power means accounting for that mobility from day one, not retrofitting solutions as problems arise.
Matching your power source to the load
The first step in any temporary power plan is understanding what you're actually powering. Resistive loads like lighting and heating are straightforward, but motor-driven equipment such as pumps, compressors, and cranes draw significant surge current at start-up, sometimes three to six times their running load. If your generator is sized only for running loads, motor start events will trip the unit or damage sensitive equipment downstream. A proper load assessment is essential before you specify a generator, and on infrastructure projects that assessment needs to reflect the peak demand at each work zone, not just the average across the whole project.
Once you know your loads, the next question is whether a conventional diesel generator, a hybrid generator-battery system, or a standalone battery energy storage system (BESS) is the right fit. Each has a place on an infrastructure project, and many projects use a combination depending on the zone.
Diesel generators: still the backbone of remote power
For high-load zones, extended runtimes, and locations where grid access is genuinely out of reach, diesel generators remain the most practical primary power source. Modern units from reputable manufacturers are quieter, more fuel-efficient, and better suited to load-management than older equipment. The key is choosing the right size. A generator running consistently below 30 percent of its rated load is wet-stacking, accumulating unburned carbon deposits that will shorten service life and increase maintenance costs. Conversely, a unit running above 80 percent load continuously will accumulate heat and wear faster than its service schedule accounts for.
For projects where load varies significantly across the day, a paralleled generator setup allows you to run one unit at optimal load during off-peak periods and bring a second online during peak demand. This approach is more fuel-efficient than running a single oversized unit at low load around the clock.
Hybrid and BESS solutions for infrastructure sites
Battery energy storage systems are increasingly common on infrastructure projects, particularly where noise restrictions apply near residential areas, where fuel logistics are expensive, or where projects have sustainability commitments to meet. A hybrid system pairs a diesel generator with a battery bank. The generator charges the battery and handles peak top-up, while the battery carries the load during quieter periods, overnight, or during brief peaks that would otherwise require a larger generator.
The practical result is fewer generator running hours, lower fuel consumption, and reduced maintenance intervals. On a long-duration infrastructure project, those savings compound substantially. If you're weighing up the options, our comparison of generators vs battery storage for site power walks through the decision in more detail.
Welfare facilities and auxiliary loads
Temporary offices, crib rooms, first-aid facilities, and communications equipment are often treated as an afterthought in power planning, but they add up. A well-equipped site welfare block running heating, cooling, lighting, computers, and communications can draw anywhere from 10 to 30 kVA depending on occupancy and climate. On remote infrastructure projects in northern Australia, air conditioning load alone can be significant. Plan these loads into your overall site power budget and consider whether a smaller dedicated generator or a BESS unit is more appropriate for welfare facilities than drawing from the same supply as heavy plant.
Fuel logistics and runtime planning
On linear infrastructure projects, fuel delivery can be one of the biggest hidden costs. A generator running at full load in a remote location may burn 20 to 40 litres of diesel per hour. Multiply that by multiple units across a corridor project and fuel logistics become a major planning item. Specifying generators with large integrated fuel tanks, or arranging bulk fuel storage at key points along the route, reduces the frequency of fuel deliveries and the associated cost and risk of running a site dry. Hybrid and BESS systems help here too, since reducing generator runtime directly reduces fuel consumption and delivery frequency.
Reliability and servicing on remote projects
An infrastructure project in a remote corridor is not somewhere you want an unplanned generator failure. The nearest service technician may be hours away, and a shutdown means idle crews, delayed schedules, and potentially cascading programme impacts. Specifying equipment from suppliers with genuine spare parts availability and responsive field service is not a procurement luxury on remote work; it is a risk management necessity. Regular preventive servicing on a defined schedule keeps equipment in good condition and surfaces potential issues before they become failures. The value of proper servicing and genuine parts on remote infrastructure projects cannot be overstated.
Planning for project phases
Temporary power on a multi-year infrastructure project should be planned in phases. Early civil works, including earthworks, drainage, and structural foundations, tend to have different load profiles from later fitout and systems installation phases. Equipment that is right for the civil phase may be over-specified and expensive to run during fitout, or under-specified when major plant is concentrated at a particular point. Build a phased power plan at the start of the project, revisit it at each major milestone, and retain enough flexibility in your hire agreements to adjust equipment as the project evolves.
Getting temporary power right on an infrastructure project takes planning, the right equipment mix, and a supply partner who understands the realities of working in remote and demanding conditions. Start with a thorough load assessment, think about how your power needs will shift as the project progresses, and choose solutions that balance reliability, fuel efficiency, and total cost over the project's life.