mattsccm wrote: ↑6 Aug 2021, 12:22pm "There’s a legal limit to the Wattage assistance, for a road legal eBike ( I think it’s 250 Watts ). That would equate to a very useful speed on the flat, but rubbish on a steep, long climb. Of course, YouTube and other video sharing type sites are very good at instructing people, in how to get around / hack legal motors. That’s up to the riders in question I guess."
Nope. Other way round surely?
15mph isn't much cop on a nice flat road but being able to keep that up on a nice long steep hill is.
Motor wattage is 250w nominal and is it's rating and not it's max output power. For instance if you ran a 250w motor at 48v with 20a current it can output 960w from the controller and approx. 750w at the motor. There are no max output nmbers for pedelecs only that the nominal rating of the hub is 250w. The rating is that which the maker so wishes to rate it at.
On the Pedelecforum.de a trike/tadpole user modded his basic Bafang SWXK 250w hub motor to produce some 1500w power from the motor. Simply providing oil cooling internally and supplying 40a the hub produced nearly 2kw from the controller and successfully ran without overheating.