In a recent Fluid Power World webinar discussing the benefits and ideal applications for hybrid systems, Barun Acharya, System Applications Engineering Manager at Parker Hannifin, shared valuable insights. “One way to determine if electrification is the best fit for a piece of equipment is to look at the power consumption versus the duty cycle,” Acharya explained. “If the duty cycle is low and the power requirement is modest, electrification makes perfect sense—like with golf carts or small forklifts, where electrification is already a reality. However, for applications with high power demands and long duty cycles, such as large excavators, electrification doesn’t quite add up.”

Acharya did highlight an exception, noting that mining operations, which often run continuously and are maintained for decades, typically have the necessary electrical transmission infrastructure in place. This makes electrification a viable option for mining machines.

Despite Acharya's cautious words, there’s a growing trend of electrifying large excavators and similar heavy machinery. This shift raises the question: even with access to charging stations, will these massive machines be able to meet the required runtimes? At MinExpo last month, Liebherr showcased three electric machines, which was impressive given their size and the fact that they were powered by battery solutions. Liebherr also announced a partnership with Fortescue Zero for its T 264 autonomous truck, featuring Fortescue’s stationary fast-charging solution. This system can deliver up to 6 MW of power in just 30 minutes via robotic connections.

However, a potential drawback to all the excitement is that companies have yet to reveal the truck’s runtime. If it’s similar to what Acharya mentioned—3 to 4 hours of operation—then you’re still losing about 3 hours of productivity per 24-hour period to charging. Furthermore, Acharya pointed out the high costs associated with electric machines, especially the expensive batteries. Additionally, these battery-powered machines are significantly heavier, which results in a 25-30% reduction in payload capacity.

In Acharya’s discussion, he emphasized the best use cases for hybrid machines, noting that government incentives and rebates could play a crucial role in their adoption, especially as most incentives are currently focused on fully electric, battery-powered designs.

Finding the right balance is key. To effectively reduce emissions and maintain productive fleets, it's important to continue developing and studying the opportunities for the four types of electrified machines and hybrid designs in the off-highway sector. These solutions need to be matched with the appropriate applications to ensure they provide real value. Electrifying just for the sake of electrification could lead to a waste of R&D resources and time.