Volvo Construction Equipment has begun customer testing in Norway of a pre-build EC500 Electric excavator, a 50-tonne-class machine designed to use onboard battery power, a grid connection through a 35-metre cable reel, or both.
The testing moves the machine from development into live quarrying, road-building and tunnel applications. Volvo says it expects the EC500 Electric to be available for sale from spring 2027, with serial deliveries targeted from the end of 2027. Those dates are manufacturer expectations, not confirmed production milestones.
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What changed
The EC500 Electric is a development-stage, or “pre-build”, machine rather than a fully specified production excavator. Volvo’s customer programme is intended to gather feedback before final product development is complete.
The main change is the combination of two power modes in a large excavator:
- Grid-connected operation: the machine can draw electricity through a 35-metre cable reel.
- Battery operation: the onboard battery can provide power when the excavator needs to move, relocate or work away from the grid connection.
- Combined operation: the battery and grid connection can be used together, according to Volvo.
This approach addresses a practical constraint in construction electrification. Large excavators may need substantial energy for sustained work, but a fixed cable can restrict movement around a site. A battery can provide short-duration mobility or allow work to continue during periods when the machine is not connected to the grid.
Volvo says the electric machine is designed to deliver the same performance as the conventional EC500. The supplied announcement does not include independent measurements showing how closely the pre-build machine matches that objective.
How the excavator can use battery and grid power
Volvo describes the EC500 Electric’s electrical system as being based on 400V operation and designed to adapt to different grid conditions. The machine also includes battery and grid-management systems intended to coordinate the two sources of power.
The company says the onboard battery can provide two to three hours of working, depending on the application and operating conditions. That figure is conditional: Volvo does not provide a standardised test cycle, battery capacity in kilowatt-hours or a detailed definition of the work performed during that period.
A grid-connected battery-electric machine can use the grid for longer-duration work while reserving battery power for movement, interruptions, changes in site position or short periods away from the cable. The specific performance of this implementation still has to be established through the customer testing programme.
Volvo also says the system can support peak shaving. Peak shaving means reducing or shifting short periods of high electricity demand so equipment places less peak load on the available electrical supply. In this case, the battery could help manage high-demand periods and potentially reduce the need for high-capacity grid infrastructure. The announcement does not provide measured results for peak demand, required connection capacity or infrastructure cost.
The dual-power design should not be interpreted as meaning that the excavator never needs energy replenishment. Battery operation is limited by the stated working time, and the source does not establish the charging rate, charging arrangement or whether a particular site can operate continuously without a suitable grid supply.
What Volvo is testing
The current programme covers customer operations in quarrying, road building and tunnel projects. These environments can expose the machine to different requirements for digging, loading, relocation, cable handling and site integration.
Volvo says it is collecting feedback on:
- machine behaviour and performance;
- battery working time and charging;
- grid connection and grid integration;
- operator experience; and
- practical integration into worksites.
Customer feedback will feed into the remaining product-development work. This means the production version may differ from the pre-build machine currently being tested.
The programme is a manufacturer-led real-world test of one development-stage machine. It is not a peer-reviewed study or an independent performance assessment, and the supplied evidence does not provide a sample size, standardised productivity results or a measured comparison with the conventional EC500.