Reliable Power for the Modern Port
Onsite gas‑engine microgrids designed to secure operations, enable electrification, and manage energy costs at ports.
About Modern Ports
Ports are electrifying fast — from shore power and electric equipment to EV fleets — but grid capacity and resilience often lag behind. Onsite power generation and microgrids based on high‑efficiency gas engines provide a reliable, flexible foundation for today’s operations and tomorrow’s decarbonisation goals.
By generating power where it’s needed, ports can reduce exposure to outages and price volatility, unlock capacity faster than grid upgrades, and confidently support shore power and EV charging. Integrated with battery storage, renewables and the grid, gas‑engine microgrids offer a proven, bankable energy backbone for round‑the‑clock port performance.
Key Benefits for Ports
Resilience for 24/7 Port Operations
Ports cannot afford downtime. Onsite generation provides reliable, dispatchable power that supports continuous operations, even during grid outages or disruptions. Microgrids are designed to protect critical loads and keep terminals, cranes and cold ironing systems running when it matters most.
Enabling Port Electrification
Shore power, electric cargo handling equipment and EV charging all increase demand on already constrained grids. Onsite power acts as the backbone that enables electrification to scale, supporting high‑load applications while maintaining power quality and stability across the port.
Cost Control and Smarter Grid Use
By generating power locally, ports can optimise when and how they use grid electricity. Gas‑engine microgrids can help to reduce peak demand charges, manage energy costs, and create flexibility to respond to price volatility and evolving tariff structures.
How It Works: Gas‑Engine Microgrids for Ports
A port microgrid is a locally managed energy system that combines onsite power generation with storage, renewables and the existing utility grid. It is designed to supply electricity reliably to port operations — either working in parallel with the grid or independently in island mode.
At the heart of the system are high‑efficiency gas engines. Unlike intermittent energy sources, gas engines provide flexible, dispatchable power that can ramp up and down quickly to match port demand. This makes them well suited to dynamic environments such as terminals, where loads change throughout the day as vessels arrive, cranes operate and shore power connections are activated.
Battery energy storage can be integrated to smooth peaks, store excess energy and provide fast‑response power for short‑duration loads. Solar PV and other renewables can be added to further reduce emissions and grid dependence. Advanced control systems coordinate all assets — gas engines, batteries, renewables and grid connection — to ensure the lowest‑cost, most reliable power at any given time.
Together, this microgrid architecture underpins critical port functions, from shore power and EV charging to navigation, security and IT infrastructure, while creating a scalable platform for future electrification.
Use Cases & Scenarios
Container Terminals and Cranes
Cruise and Ferry Terminals with Shore Power
Logistics Parks and Warehouses
Backup and Island Mode Operation
Container Terminals and Cranes
Reliable, onsite power supports energy‑intensive cranes and handling equipment, reducing exposure to grid outages and capacity limitations during peak operational periods.
Cruise and Ferry Terminals with Shore Power
Microgrids provide the high, stable loads required for cold ironing, allowing vessels to plug in without overwhelming local grid infrastructure.
Logistics Parks and Warehouses
Onsite generation supports electrified fleets, warehouses and cold storage facilities in and around the port, ensuring consistent power for time‑critical logistics operations.
Backup and Island Mode Operation
During grid failures, the microgrid can operate independently, maintaining power to essential systems and protecting port operations from unexpected disruption.
Decarbonisation & Future‑Ready Pathway
Gas‑engine‑based microgrids offer a practical and immediately deployable pathway to lower‑carbon port operations. By replacing diesel backup generation and reducing reliance on high‑carbon grid electricity during peak periods, onsite generation can help to reduce emissions today while supporting electrification initiatives.
Where available, gas engines can operate on lower‑carbon fuels such as biogas or biomethane, further improving the environmental profile of the port’s energy system. Many modern engines are also designed with future fuel flexibility in mind, enabling gradual evolution toward hydrogen blends or other low‑carbon fuels as infrastructure and regulation mature.
Rather than waiting for large‑scale grid reinforcements or future technologies, microgrids allow ports to act now — building an energy system that meets current operational needs while remaining adaptable as decarbonisation pathways become clearer and more commercially viable.
Commercial & Business Value
- Predictable energy costs through optimised CAPEX and long‑term O&M structures
- Faster access to additional power capacity compared to grid upgrade timelines
- Reduced exposure to outages, energy price volatility and operational interruptions
- Ability to optimise peak demand and manage energy more intelligently
- Optional participation in grid services or demand response markets, where applicable
- Long‑term performance guarantees and lifecycle support from a single partner
Frequently Asked Questions about Ports
Technical and Engineering
What is a microgrid and how does it work in a port environment?
A port microgrid is a locally controlled energy system that combines onsite generation, energy storage, and grid connection. It supplies power to port operations while balancing demand, costs, and resilience. Microgrids can operate alongside the grid or independently during outages, which is critical for ports with 24/7 operations.
Why are gas engines well suited for port microgrids?
Gas engines provide reliable, dispatchable power that can respond quickly to changing port loads such as cranes, shore power, and EV charging. Unlike intermittent generation alone, gas engines can deliver consistent output while integrating with batteries and renewables. They are a proven, bankable technology for industrial-scale energy systems.
Can onsite power support shore power (cold ironing) at ports?
Yes. Shore power requires high, stable electrical loads that can strain local grids. Onsite gas-engine-based generation can supply or supplement this demand, ensuring vessels can connect reliably without overloading grid infrastructure.
How does a microgrid integrate with batteries and solar PV?
Gas engines provide the backbone of power, while batteries handle fast-response peaks and short-duration loads. Solar PV can be added to reduce grid consumption and emissions. An energy management system coordinates all assets to optimize performance, cost, and reliability.
Financial and Commercial
Is onsite power cheaper than buying electricity from the grid?
Onsite power can significantly improve cost predictability compared to relying solely on grid electricity. By reducing peak demand charges and exposure to price volatility, microgrids often lower total energy costs over time. The exact economics depend on load profiles, fuel pricing, and local tariffs.
Can onsite generation unlock capacity faster than grid upgrades?
Yes. Grid upgrades can take years and depend on permitting and utility investment. Onsite generation can often be deployed faster, allowing ports to add capacity to support electrification without waiting for grid reinforcement.
How are microgrid projects typically financed?
Projects can be delivered through various commercial models, including capital purchase, energy‑as‑a‑service, or long‑term power and maintenance agreements. Clarke Energy structures solutions to align capital spend with operational budgets and long‑term performance guarantees.
Can ports earn revenue from grid services using a microgrid?
In some markets, microgrids can participate in grid services such as demand response or ancillary services. Gas engines are particularly well suited due to their controllability and availability. This can create additional revenue streams while supporting grid stability.
Environmental and Sustainability
How do gas-engine microgrids support port decarbonisation?
Gas engines emit less carbon and local air pollutants than diesel-based generation and can reduce reliance on high‑carbon peak grid power. When combined with electrification initiatives like shore power and EV charging, they help ports lower overall emissions today.
Can gas engines run on low carbon or renewable fuels?
Where available, gas engines can operate on biogas or biomethane, significantly reducing lifecycle emissions. Many modern engines are also designed to accommodate future fuel blends, offering a pathway toward lower‑carbon operation as fuel infrastructure evolves.
Are gas-engine solutions compatible with long-term net zero goals?
Yes, when deployed as part of a phased energy strategy. Gas-engine microgrids provide a near‑term solution that enables electrification now while remaining adaptable to future fuels, technologies, and regulatory requirements.
Operational and Implementation
How reliable is onsite power compared to grid supply?
Onsite power improves reliability by reducing dependence on a single external grid connection. Microgrids are designed with redundancy and can isolate from the grid during outages, maintaining power to critical port operations.
How complex is it to operate and maintain a port microgrid?
From the operator’s perspective, complexity is managed by the solution provider. Clarke Energy delivers long‑term operation and maintenance services, remote monitoring, and performance guarantees, allowing port teams to focus on core operations.
Can a microgrid be expanded as port electrification grows?
Yes. Microgrids are modular by design, allowing additional generation, batteries, or renewables to be added over time. This makes them well suited for ports with phased electrification plans and evolving power requirements.
Looking for a resilient onsite power generation solution for ports?
Every port has unique operational, electrical and regulatory constraints. Our team works with port authorities and operators to assess onsite power and microgrid opportunities tailored to your specific infrastructure, electrification plans and sustainability goals. Start with a feasibility study to understand how onsite generation can support shore power, EV charging and resilient port operations.
