There is no specialised ordonance for bicycles, so rules for general product safety apply.
There are requirements for use on public roads, laid down in the
A bike must comprise two spearate brakes, a bell as well as lighting equipment and several reflectors. The lighting equipment needs a type approval by Kraftfahrtbundesamts.
A Pedelec may comprise an electric motor of up to 250W power and may supprot up to a speed of 25 km/h.
Faster S-Pedelecs or electric small motorcycles need a type approval by the Kraftfahrt-Bundesamt.
Competent Federal Organisations
prodcut safety: ICSMS authority search