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Greener Upgrades blog series #2

The benefits of Stage V generators

The route to Stage V compliance and beyond

The adoption of Stage V certified generators is not limited to specific industries . Regardless of whether you are in manufacturing, petrochemicals, utilities, or construction, these generators offer a universal solution for reducing emissions, ensuring compliance with environmental regulations, improving fuel efficiency, enhancing engine performance, and enabling the use of greener fuels .

Aggreko's significant investment in Stage V equipment is a demonstration of the impact the technology can have on business operations in terms of emission reduction and reduced fuel expenditure. In this blog we explore Stage V technology, its benefits and common terminology. 

What is Stage V?

Stage V is part of a 25-year emissions reduction programme set by the European Commission. The programme targets the reduction of harmful elements within exhaust gases which benefits both the wider environment and local air quality. Its primary objectives include curbing detrimental emissions, with a specific emphasis on NOx (nitrogen oxides), PM (particulate matter), and PN (particle number). 

The set of air pollutants that are vastly minimised when using Stage V technology is: 

  • Nitrogen Oxides (NOx)
  • Particulate Matter (PM)
  • Carbon Monoxide (CO)
  • Unburnt Hydrocarbons (HC)

The advantages of Stage V generators

Reduced emissions

Stage V engines are designed to emit significantly lower levels of harmful pollutants such as particulate matter (PM), hydrocarbons (HC) and nitrogen oxides (NOx), leading to improved air quality and reduced environmental impact. In some instances, these harmful emissions can be reduced by up to 90%. Take a look at the table below to see some comparisons:


Stage V engines are compliant with the latest environmental regulations, ensuring that machinery and equipment meet the legal emission standards, particularly important when operating in low or ultra-low emission zones. Not complying with the required standards for a project can lead to fines, legal issues and reputational damage. 

Larger power projects

For large power projects, emission regulations can be even more stringent so considering technologies like Stage V is even more essential. This is why Aggreko have developed exclusive 1MW+ containerised sets to suit our customers’ needs. 

Fuel efficiency

Stage V engines are fuel efficient, resulting in long-term cost savings from decreased fuel consumption and therefore reduced expenditure. This financial advantage is attractive to customers looking to reduce overall project costs while minimising environmental footprint.

Engine performance

Quality components and advance features ensure maximum efficiency.

Greener fuel compatibility

Stage V engines are designed to be compatible with various greener fuels such as HVO. Making it easier for our customers to reduce their carbon footprint and further minimise environmental impact. 

Noise reduction

Our Stage V canopies and containerised products incorporate the latest noise reduction technology. Ensuring minimal disruption, particularly important in urban or noise-sensitive environments.

What are the key components of a Stage V generator?

Stage V generators at Swindon depot

An engine designed to meet emission requirements of Stage V regulations. The engine is equipped with advanced technology to reduce emissions and improve fuel efficiency.

Our Stage V canopy and containerised packages include noise reduction features, making them ideal for low-noise requirements. 

Stage V engines include exhaust aftertreatment to reduce particulate matter and NOx emissions. Including diesel particulate filters (DPF) and selective catalytic reduction (SCR) systems. 

Air intake and exhaust systems aid the combustion process and reduce emissions.

These Stage V components work together to result in reduced emissions of particulate matter and harmful gases like nitrogen oxides (NOx).

How to get the most out of Stage V generators

Stage V engines face challenges when operating at very low loads for extended periods. However, when specifying a project, we use strategies to align power supply with project demands and ensure when the generator runs, it does so at optimal capacity. In order to do this, we use insights and data to understand the power profile and deliver the most efficient solution.

We can implement several measures to ensure Stage V generators perform optimally, such as:

  • Integrating Battery Energy Storage Systems (BESS): Utilising BESS to take over low loads or support spikes in demand.
  • Rightsizing the generator: Ensuring we are not over-sizing the generator for the specific power requirement.
  • Load on demand: Deploying multiple generators that can switch on or off to scale power up or down according to varying demand.
  • Working collaboratively: Stage V engines may not always be the ideal solution, but we work with you to determine the most suitable approach for your project.

You can rely on our sales experts to define your project needs and ensure the optimal power package is provided to cater to your needs.


There is no doubt that Stage V generators have a multitude of benefits. Moving from less efficient engines to Stage V is the right choice for a wide range of projects. Regardless of your industry, from data centres and construction to manufacturing or utilities, a simple switch to Stage V can have a hugely positive impact. Our experts work with you to ensure the right power package is provided, ensuring maximum efficiency, minimal emissions and reduced fuel expenditure.
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