Mobile BESS offers a way to deliver stored electricity to sites where demand exists but grid supply is limited, delayed, or too expensive to extend. This case study asks whether mobile battery energy storage can grow from an interim workaround into a standalone energy infrastructure business. The protagonist, a newly appointed head of energy solutions at an established mobility and construction equipment company, is tasked with studying the market and building a strategy for an Energy Storage as a Service model.
The Problem: Electrification Faster Than the Grid Can Follow
Electrification is accelerating across mobility, construction, and heavy industry, but the supporting power infrastructure is not keeping pace. Grid upgrades can take years, leaving a persistent gap for operators who want to run electrified fleets and machines. The company at the centre of the case has spent 50 years in automotive and construction equipment and has recently diversified into electric mobility. It now sees that selling electrified equipment is not enough if customers cannot power it. Diesel remains the default fallback, and its cost and availability weigh heavily on operating budgets. The global diesel generator market was worth around 19.7 billion dollars in 2024 and is projected to reach 30.32 billion dollars by 2030, growing at about 7.45 percent a year. That dependence is precisely the gap mobile BESS is designed to close.
The Approach: Modular Batteries That Travel to the Load
The concept deploys modular battery systems mounted on trailers, trucks, or containerised platforms that can transport stored electricity to the point of need. Mobility is achieved three ways: trailer-mounted units with a charger, swappable containerised units, and truck-mounted units with a charger. The systems use lithium iron phosphate (LFP) chemistry, chosen for better thermal stability, longer cycle life, and falling cost. A power conversion system allows the stored DC energy to serve both AC and DC applications, while air or liquid cooling and a battery management system protect performance and safety. Remote telemetry supports real-time monitoring where coverage allows. The product portfolio spans small units of 300 to 500 kWh, medium units of 1 to 3 MWh, and large units of 5 to 20 MWh, so the same platform can serve very different loads.
The Findings: A Beachhead in Construction and Mining
The recommended entry strategy is a focused beachhead targeting construction and heavy industry, and mining in particular, in regions where the grid is weak or unreliable. These sectors depend heavily on diesel, operate in remote locations, and often need temporary power, which creates immediate cost-saving opportunities and strong product-market fit. A worked example comparing a mobile BESS rental against a diesel genset showed a monthly saving of roughly 32 percent, alongside lower carbon emissions and reduced noise. On the mobility side, the case notes that vehicle sales are constrained by thin charging coverage: the world averages around 11 electric light-duty vehicles per public charging point, rising to nearly 82 in New Zealand, while the light EV market is projected to grow at more than 32.5 percent a year. Mobile charging units can help EV fleets and dealerships bridge that shortfall.
What It Means for the Industry
The case treats mobile storage as a services business rather than a hardware sale. Success depends on operations and logistics: charging hubs, off-peak scheduling to lower energy costs, centralised depots, and integration with on-site renewables. Revenue can come from monthly rental, ESaS charging fees per kWh, or long-term contracts that mix both, and the case recommends piloting several models before committing. Scaling requires partnerships across three fronts: industry agreements with construction and mining firms, energy and infrastructure partners for grid access and charging hubs, and logistics partners for moving and redeploying units. A phased rollout from a small pilot to a regional network keeps capital exposure controlled while the operating data matures.
Key Takeaways
Mobile BESS delivers power to sites where the grid is unavailable, delayed, or too costly to extend, filling a gap that grid upgrades cannot close quickly.
Construction and mining are the strongest initial segments because of high diesel dependency, remote operations, and temporary power needs.
A worked example showed roughly 32 percent monthly savings versus a diesel genset, plus lower emissions and noise.
LFP chemistry is selected for thermal stability, longer cycle life, and falling cost, supporting a modular and scalable design.
Operations and logistics govern profitability, so charging hubs, off-peak scheduling, and renewable integration are central to the model.
Revenue can blend equipment rental, Energy Storage as a Service fees, and long-term service contracts, with pilots used to test each.
Thin EV charging coverage, around 11 vehicles per public charge point globally, creates a secondary opportunity for mobile charging.
Disclaimer: This case study was developed and presented by BatteryMBA participants as part of the Case Study Track. Views, analysis and recommendations are the authors' own. BatteryMBA does not take responsibility for the accuracy or completeness of the content and it should not be relied upon as investment, engineering or legal advice.
This is the public summary, the full case study lives inside the programme
Every BatteryMBA cohort runs the Case Study Track: small teams build the full recommendation, backed by a written document and a live presentation, supported by the BatteryMBA team. Full case study documents are not shared outside the programme. programme.
mobile BESSEnergy Storage as a Servicemobile battery energy storagediesel generator replacementEV fleet chargingLFP batteryconstruction site powermining electrification
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