DIN33958

All I know is that this 'standard' has been used to approve some 1.5 W dynamos in StVZO, which is possible by virtue of the possibility to deviate from the requirements in TA, as described in TA.1.3.

There have been some dynamos released for this standard and recently some taillamps and headlamps. The Herrmans H-black pro for example. But what is the f-ing point? We need more power, esp. from the dynamo, for e.g. USB power and better lighting. With high efficiency dynamos it also doesn't matter much if you put out 3W or 5W at a given speed, any cyclist can supply the required power (at say 66% efficiency (a nice round number if you get my point, and most good dynamos perform not far from that, some a bit better others slightly less), this would mean 1.5x 3W or 1.5 x 5W, so 4.5 or 7.5W. You will not notice a speed drop from 3W extra... The argument that the dynamos can be made cheaper doesn't make sense, Shimano has very cheap 3W dynamos and the 1.5 W dynamos that I've seen are not cheap at all. Lower weight is also not really an argument as the 1.5W dynamos that I've seen by Shimano are actually heavier than e.g. SP 3W dynamos...

If anyone has a copy for me to examine, send me an email...

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