Dumpers

A prototype of Thwaites' first electric site dumper.

It is powered by four lithium-ion (dry-cell) batteries, operating at 48V. Each battery is rated at 5.75kWh, driving one motor for traction and another for hydraulic tipping.

The electric drive 3-tonne dumper has a similar unladen weight to the diesel/hydrostatic version but with the main battery pack and driveline components now sitting lower in the rear chassis, it has a lower centre of gravity and thus better stability.

The standard on-board 3.4kW battery charger can charge the pack from 0-100% in eight hours. Optional off-board chargers rated at 7kW (single-phase) and 22kW (three-phase) have charge times of four hours and two hours respectively.

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