Swedish construction machinery manufacturer Dynapac, part of the Atlas Copco Group, is advancing the electrification of its compaction rollers. The company is responding to growing pressure to reduce CO2 emissions in the construction industry and positioning itself for upcoming tightening of emission standards in European city centers. The announcement raises the question: How advanced is electric technology really in heavy construction machinery – and where are the technical limits still?
Dynapac already has several battery-powered models in its portfolio, including compact tandem rollers for urban use. So far, electrification has focused primarily on smaller machine classes up to about 3 tons operating weight, which are used in road construction, sidewalks, and noise-sensitive areas. Advantage: emission-free operation, reduced noise pollution, and simple operation without diesel management. Disadvantage: limited operating time and dependence on charging infrastructure at the construction site.
The greatest challenge remains battery energy density. While vibratory plates and compact twin drum rollers already have proven lithium-ion batteries, heavy rollers from 10 tons operating weight hit physical limits. The required drive power for vibration and travel operation over multiple shifts requires battery capacities that significantly increase weight and space – and thus impair economic efficiency.
Another obstacle is charging infrastructure. While manufacturers like BOMAG and HAMM also offer electrified models, many construction sites lack the necessary charging capacity. Fast charging systems with 22 kW or more are rarely available, making it difficult to use electric rollers in multi-shift operations. Hybrid drives that combine diesel and electric are therefore considered a transitional solution – particularly for larger machines over 5 tons.
Technically, the requirements for compaction performance are also a hurdle. Rollers must generate high vibration frequencies and amplitudes, which continuously demands energy. In asphalt paving projects with long distances and tight time windows, machines must work for several hours without interruption. Here, diesel-powered compaction equipment still has a clear advantage.
Nevertheless, the market is showing first successes: on emission-free construction sites in Scandinavia and in German city centers with strict environmental zones, electric rollers are already in use. However, electrification of construction sites requires a comprehensive concept of machinery, charging infrastructure, and adapted workflows. Dynapac's electric offensive is therefore less a technical revolution than a strategic positioning in a market that is gradually changing – with an open outcome for heavy machine classes.
