Even though larger battery capacities are expected in the future due to increasing energy density, the problems of (purely) battery-operated buses are not solved. Rather, the recharging problem is growing more acute, since the transfer of more kWh requires more time.

Overhead wires offer the highest-performance recharging opportunity thanks to airstream cooling, with up to 500 kW – and that’s without any time limitations. So the LibroDuct technology combines the virtues of the trolleybus with those of the battery-operated bus. It enables battery-operated buses to recharge while on their journeys – even if only at bus stops. That means a drastic reduction in the needed battery capacity.

The power consumption peaks that occur when starting to drive and climbing uphill can be handled efficiently and elegantly by recharging while driving. This synergistic effect reduces the needed battery capacities further, or alternatively, extends travel ranges. Recuperated energy can be fed back into the overhead wires and used by other buses (or trams) without conversion loss.