This European Standard is intended to cover electrically power assisted cycles of a type which have amaximum continuous rated power of 0,25 kW, of which the output is progressively reduced and finally cut offas the vehicle reaches a speed of 25 km/h, or sooner, if the cyclist stops pedalling. This European Standard specifies safety requirements and test methods for the assessment of the design andassembly of electrically power assisted bicycles and sub-assemblies for systems using battery voltage up to 48 VDC or integrated a battery charger with a 230 V input.This European Standard specifies requirements and test methods for engine power management systems,electrical circuits including the charging system for the assessment of the design and assembly of electricallypower assisted cycles and sub-assemblies for systems having a voltage up to and including 48 VDC orintegrated a battery charger with a 230 V input.