You shouldn't get confused between watts from the battery and watts from the motor. There is no direct relationship. When you bring the word "continuous" into the requirement, it means in all normal riding circumstances, including going up steep hills. In other words, the motor needs to be able to output 250w when going up a steep hill with efficiency as low as 30% without overheating. Actually, there are not many motors that can do that. When they test a motor to see if it meets its rating, they run it at its maximum efficiency rpm. You would therefore need a safety factor of 3 or 4 if that motor were to be used in an ebike that might have to go up hills.
Touche, mon ami
Exactly why we have troubled with “corrected” horsepower limits on ice vehicles for so long. Dynos calibrate to sea level, 20*C, atmospheric pressure etc. Your moped or class A2 horsepower restricted motorbike will make it’s maximum power ONLY on a level playing field.
Consistent, nominal or other vague terms make much more sense. Getting up my favourite hill at 15.6 mph on my epac needs way more than 250w from my controller but am I putting 250watts (about 1/3 of one brake horsepower) into the back wheel ? Totally irrelevant when one man’s mountain is another man‘s hill. Fortune smiles when I return,
The European standard is of course, Mt Blanc, from the lake (Geneva) to the tunnel. All certified 250watt pedelecs MUST be able to maintain 25kmph all the way, for geriatrics we allow starting at Chamonix. A nice average speed UP that road IMHO
On the way back there is no speed limit, just fun.,
Totally fair and just, vive la France and f#ck the Dutch, no downhill for them , 25kmph is their lot.
Keyboard warriors should have a go, 250 nominal watt proving, you need SFA watts (or horsepower) to go very fast indeed.
Foldies self restrict, of course, as do hubbies, just proving Darwin was correct. All as it should be.